Bore 60 over. Feb 17, 2012 · i found a few old threads using google.

• Bore 60 over Sep 12, 2003 · Big Block V8 - 385 Series (6. The other consideration is the block casting. A ounce of prevention. 30 over and . What is the insulating value of . . there is a reason so many hotrodders look towards the 350 chevy when they are Jan 4, 2002 · If you bore it too thin it will just crack. With aftermarket blocks you can get over 700ci. the block is bored at . Appears to be a free-be so take it and get it sonic checked to see if . If it was unsafe to go . The late 60`s 327 large journal which was only made 2 production years of 1968 and 1969 are also okay to go . You may need to uses a . 060 Sep 12, 2023 · Safe to bore a 383 60 over? Thread starter 4fortyDemon; Start date Sep 12, 2023 - 1; 2; 3; Next. I will quote a couple of the books I have. 1 of 3 Go to page. If you can have the block sonic tested, it would be a good idea. For sake of discussion, is . 060 etc. 100 Jan 3, 2010 · I had my motor for maybe a half a year. 060 inches. 76. 30, just my opinion Apr 21, 2002 · I have bought a 94 stang with a 302. 60 over? It is easy with the 327, 302 and 350 it is 4. Most become heaters. 8K views 17 replies 11 participants last post by JRouche Mar 12, 2009. 75 inches – actual displacement is just over 400. 60 over then stroked it would have been larger than a 496. 875 Pi x (2. 73 gears w/ 03-04 cobra track-lok clutch kit MAF Conversion etc Jun 15, 2007 · the Radiator is stock as well as the clutch fan the fan shroud is missing though, would that have much of an impact on the water temp? im looking for the best way to keep it running cool. One of the most common domestic undersquare engines is Chrysler’s Slant Six with a 3. The bore diameter is enlarged from 4. To build a Chevy 350 bored 60 over displacement engine, you’ll need a range of tools and Jan 25, 2005 · . Jun 25, 2012 · I have a 351 that I just had done at 60 over and the engine builder laughed when I asked him if that was too much. I've built 2 that were . The guy at the machine shop said it would be fine but was willing to go . and will the 60 over bore make me have to use a higher grade of gas and or will the flat topped piston do that also thanks in advance chevy 350 Oct 23, 2020 · 383's have thicker cylinder walls than 440's so you should be safe at 60 over (more 60 over pistons available) but if it is a 383 2bbl block or a really early casting I wouldn't trust it. 060" over in 1985 and it is still running just fine. During my search today, I came across 2 blocks. I looked at it and agreed that it posed no problem. It ran fine here in Tennessee. This is achieved by boring the cylinders out . It's been sitting in garage since 2005. It has some decent flattops and one sleeved cyl (chipped bore). With the Chevy 350 bored 60 over displacement engine, drivers can expect an impressive performance upgrade. There seems to be debate about if that is safe to do on a 351. its the original block and its bored 60 over. So the formula would be pi are squared times stroke times number of cylinders. Nov 10, 2023 · These longer stroke engines benefit from higher torque. 60 over going to effect a stoker motor 2) what is the largest ci stroker kit would you recommend I can't run this motor on pump gas so I don't drive it much (100oct min $6. 060 over 396 will be 408, whereas a . i had used a mic on the block and the peistons were stamped . That is . 125" over) after checking cyl wall thickness with no problems, but Im not recommending it. Plans are oil cooler, new radiator, electric fan and water pump. 060 over means the bore becomes 4. 935"?) with no overheating troubles. 090 over 396. Mar 23, 2008 · As many have stated previously there's nothing wrong with a . 100 between the cylinders. 1” stroke. Dec 10, 2022 · Ok. To say you can go . 50 inch stroke making it a 522. The 2 bolt block will be fine but maybe stud the mains. 060" over and one cylinder had rust. 60 over ported and polished 6x-4 heads, edelbrock performer rpm intake and cam, 1. To be safe I would have one sonic checked for minimum thickness when considering a . Feb 24, 2011 · I have a Pontiac 400 bored . 060" over, if the core shift is minimal. 078 inches (one half the diameter). Mar 12, 2004 · It means that the cylindar has been bored 0. 062 3. 060" is just fine for any of the 360 engines. 060 over size in inches. Machinists don't like going over . 060" over. i have read conflicting info online, some people say you can take a bbc to . Sonic checking of course is a must, but the earlier 360 castings have a lot more meat in the core. What you did is bore the 383 . Ill try to rebuild stock 455 motor I have but almost seems easier to go buy another motor and just freshen up and put set of supermarket heads on. 060 over bore you remove . 060" over pistons, you better believe the engines will go that far safely. It includes tips and performance suggustions. Well the engine is already 0. Never had any over heating problems. As for thickness, I would not use one if the finished thickness was less than . To get a 400 crank into a 350 block would require the main journals of the crank be turned down by . 318 inches (radius times radius). 04 Mar 25, 2009 · I probably wouldn't bore one . Jun 12, 2023 · When an engine is bored 60 over, it means the cylinder has been widened by 0. May '64 built, Poppy Red Cvt. Sep 29, 2004 · The early blocks are supposed to take a larger overbore, and . Identifying a 327 bored 60 over involves inspecting the engine for signs of boring, reading the stampings, and codes on the engine block. The engine is going in my '66 Chevy Suburban. Feb 29, 2008 · I really was not satisfied with . Steps To Build A Chevy 350 Bored 60 Over Displacement Engine. Core shift during casting is a real thing and there is no sure way to tell how thick a cyl wall is unless you have it tested. 060 over could be done, but you need to have the block sonic checked first, as most W's (302 especially) suffer ill effects over . Oct 1, 2008 · From what i under stand it would come out to a 400. Feb 16, 2004 · E-gads no on the . (I didn't know what the numbers should be, but the rebuilder was very happy with them). 60 over would have been the end of that block and I really wanted to save it if possible. My 351 has to be bored 60 over i have no choice. 60 . During the winter the temp does fine, but in the summer when it reaches 90 degrees outside, it starts to run hot if I'm in traffic. PONTIAC ENGINE CHART ENGINE BORE STROKE MAIN DIA. ford racing valve covers blue radiator hoses. 0 bored . 9 cubic inches. Sent from my SGH-T849 using AutoGuide. 14159 X stoke x #of cyl. Stock Bore 3. Don't let this scare you away from "M" block engines. Pi x (4. 045! Don't ask me? So they said that had to go to . It runs great. 22 x 8 = 297. Sep 14, 2010 · For stock truck applications, you can add cubic inches with a longer stroke and keep your bore close to stock. Oct 8, 2009 · Hi guys, BOTE stands for Beast of The East! Slayer for the Dragon on the side of my 22ft offshore Mirage Intruder 217 (same as baja 220)! Okay I had a 66 BBC Corvette stingray bored 60 over with cast iron Marine heads. 08 over a stock 4. Mar 13, 2014 · A 427 Ford had a standard bore of 4. 060 over 390 = 4. The “60 over” refers to the fact that the cylinders have been bored out . The process results in more horsepower and torque due to enhanced combustion. 060. 233, at 4. Jun 9, 2016 · A . 8L/5. 75" stroke, correct? If so then it is a 388. 30/. You just had your terms mixed up. Mar 2, 2010 · 335 Series- 5. Has a mild cam in it too. Not trying to say yes it is or isn't safe, I've never heard of anything flexing. 060 over too much on a 460 block? - I have a question, probably been asked before. 060 make more HP than . 0625. Next Last. 000" bore and a 3. 420 . K. Also any machine shop you take a block like this too and ask about going 60 over they will sonic test the block first to even make sure there is enough meat there. 30 over. A typical engine displacement calculator will not tell you if an engine is over or under square, but determining the bore to stroke ratio will. I agree get a custom piston. 070" over is possible. , just depends on the core shift it the specific block. 090 over safely. 060 sure - if a sonic check showed sufficient wall thickness. 00 30 over 4. It is possible that it is perfectly O. of this car,and I have to have it ready to race in a superchevy event in April ,is it possible because I am on a budget,and just a little progress has been made ,but the engine is pushing over 500 horses,and I went through the trans with a tci master race overhaul kit. 400 Mar 6, 2003 · actually its 1/2 bore X 1/2 bore X 3. What is a Chevy 350 engine bored 030 over called? A 350 starts out with a 4. Feb 28, 2003 · My 390 is bored 60 over. 30 = . 060 over is 4. 060 over they wouldn't sell the rings, head gaskets and pistons for a . block indicates that it is a 70's ish block. 40 over. Mar 22, 2004 · To answer the original question, most 327 blocks, being pre-lightweight castings, can be bored . 90 with no problems? and are flat top pistons in that size availible readily? I have not driven the car in 15 years, and have 12 1/2 to one compression right nowno good. 1/370, 7. 030" over by the factory. Its possible to see the squared relationship between bore and displacement and simplify to remove the need to know your stroke: new bore/old bore = ratio Feb 23, 2012 · ok my engine is gettin bored over 60 not by choice though, lol im trying to decide if i should get domed or flat topped pistons. xxx 60 over 3. 750 3. I would also note that if you're looking for a bigger bore you can probably get a 350 core for much less than it will cost you to bore the 305, and you'll end up with more more than the 0. 030″ over the standard 400 SBC bore size of 4. 030" is that the bores may not be able to hold their shape (I've seen one where you could light between the rings, and cylinder wall). 60 over. 98 1. aluminum underdrive pullys i mite of forgot some things Apr 27, 2011 · Hello guys I just bought a 350 from this guy that built it for a circle track car. 100" over and some have difficulty going . If you are investing hard earned money into an engine, I would go with a sonic check. 060" over, and I was driving it everyday to work. Thanks. 79 stroke in her and she shifts at 6900, 6900 and goes out the gate at 7100. Chevy 350 bored 60 over is a process of increasing the engine’s displacement by sixty thousandths of an inch. For the people that actually have a motor similar or know people who have a 60 overbore 351w will i have issues with it over heating or not. Oct 26, 2023 · This depends on the model of the car. 0035 ( which would be . 156 inches diameter. cheers A standard bore 4. An "M" block engine is good for one or two complete rebuilds before you have to What is the Bore Size of a 400 Sbc 30 Over? The bore size of a 400 SBC 30 over is 4. 440. But there is no way I'd ever feel comfortable with my engine if it were twice the factory recommended overbore. If you want a big bore, long stroke combo you would be better off with an aftermarket block. 060 over 289 to begin with. (only numbers i can find are 90e-6015-e3a and 9a31 then off to one side is a 79. 1 alum venolia pistons and rods alum D port heads w/ oversized valves roller cam/lifters & rockers/stud girdle tunnel ram w/ 2 750 holleys Never had it on a dyno but the car runs high 9's in the 1/4 mile in street trim : ) About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright This website is used for info on 70-81 Trans Am's and Pontiacs. I have even bored a few to 4. . It already has been bored . 60 overbore, so I went looking today at a local engine core shop close by. 060 over bore can cause over heating. 00 inches for a total displacement of 350 cubic inches. 110 bore so I am going to order pistons and keep her going. 030 cast iron? Feb 1, 2004 · The 400 cannot be bored to (. The first is "HOW TO BUILD MAX PERFORMANCE CHEVY RAT MOTORS" Thios is the quote "Many of the 402 engines were called "396's" or "400 4 barrel" motors and this caused some confusion, but all were 396 engines bored . 75 crank. 060) over. Would I bore it to 60 if I didnt have to, No but run what you've got, at least youll be driving the bronco and not saving for another motor wishing your driving Apr 22, 2014 · Been bored 60 over; Weiand stealth; Truck avenger carb; DOVE C heads; Comp Xtreme 4x4 cam ; Stock manifolds; Stock bottom end; It has some other odds ends MSD ignition etc. 73 Gears,Steeda LCA's,FRPP UCA's,Mickey Thompson ET Drag Radials. 75 inch Apr 28, 2012 · 60 thou over is too close to the walls and you can inherit major over heating problems. Am 800 marine cfm holley dbl pmpr and no idea about anything else because I bought the boat with this. 60. My 390 is bored 60 over, so that makes Mar 15, 2009 · I calculate the result of a 60 over 327 to be 336ci - The bore over the 327 and 350 were both 4" Generally, you'll find that quick rev of the 327 to be due to it's short 3. 5 to 1 pop up Jahns cast pistons ,,. 03)^2 x 2. so i took the heads off to make sure he wasnt monkeyshining me. Any input? Here's the background: Sep 4, 2005 · I think the cost has gone up since I had the last block done, that was around $50. But I did have it sonic checked first and it checked out OK. The 396 bore was 4. I use it all the time in my 1 ton crawler build. It also has a street dominator and a 750 cfm carb on it. 05 bore 390. 092 60 over 4. Would I "buy" a . volumue of a cylinder is: r X r X pie X L then multiply by # of cyl's 5th 5th_Ave_Sleeper View Public Profile May 19, 2010 · I had an engine built for my 68 Chevelle. 60 over and I need to know if the stock cooling set up with a new radiator specified from a 1970 Plymouth Satellite with a 318 and a flex fan is going to be enough for keeping the engine at a decent temperature? Sep 21, 2006 · Also, as mentioned several times above, a . 60 because then you run into piston availability and with the newer blocks and their thinner walls, heating problems. 40 over should I still use this block and bore it 0. Nov 21, 2007 · my 66 fairlane 390 has been bored 80 over and has a 428 crank. KenA. Any Aug 8, 2008 · Ended up going . If you are going to drive with the tires in smoke most of the time then you will need to go to a 9" unit. Feb 6, 2005 · C4 General Discussion - Does boring . 280 (just . Nov 30, 2006 · 460 cubic inches is the DISPLACEMENT (size) of the engine. 030" over, its 4. ; Resto-Mod OEM 5 bolt 333 w/DCOE Webers Jan 23, 2000 · Generally speaking, it is borderline. 31" Displacent = displacement per cylinder x 8 Jul 6, 2018 · By increasing the bore 0. It has the stock rectangular port heads with a decent valve job and aftermarket valve springs. 0-inch bore size. i have had no problems running hot. 60 over and was thinking of stroking it. 22 cubic inches per cylinder 37. Go. Oct 12, 2006 · horsepower limit ive gotten 575 out of a 60 over 350 without reliability problemshell there are guys out there running twin turbos with insane boost and getting 1,000+ so its really got to come down to what you really plan on doing with the motorcruising,street/strip,or abusing the snot out of that mouse. 60 is that ok or will it over heat? thanks, Jul 7, 2011 · Worked fine and never had any problems with any of them. 10 on top of the . 060 over block - not likely. In response to the displacement questions from back in January: Displacement Calculation for a 360 Engine cylinder volume = Pi x radius squared x height of cylinder stroke 3. Thanks Jan 18, 2012 · C3 Tech/Performance - 400 Bored . 1/2 bore is also called the radius. They preserve them somewhat well. 060 over bore, I'm guessing they are not stock. 030? - I have a block that one cylinder has been bored . can I go to . 60 over right now, and needs an overbore. 780 350 CU. The car makes about 625hp and around 580tq. I ask some of my buddys and some say its bored too much and the walls are thin and i should take it easy on it. Racing , Mar 18, 2014 SHARE POST #23 Sep 2, 2020 · I am overhauling my 351W this winter. 100" over with another. 5/460) - Is . i run twin 11 in electric fans from spal with out the original clutch fan. May 27, 2005 · My 388ci is . Very slim odd that your in danger of a bore being too thin but the sonic tester is the only way to know May 21, 2005 · ~Jim 1990 LX Supercharged 349 Dart Sportsman Block,CHP Pro-Street Forged Stroker Kit,Canfield Cylinder Heads,Jay Allen Blower Cam,Holley Systemax Intake,75mm TB,Paxton Novi 1K Blower,80mm Pro-M MAF,Spec Stage 3 Clutch,3. I myself would have absolutly no problem buying a car with a 350SBC Bored . 905 60 over 3. Any suggestions or previous experience with . 10/. Jan 20, 2005 · mines bored 30thou with 408 cubes and 11. Ford did this to save weight. 060 pistons and they fit in the hole. 120 on the thrust side and he said the core shift was good but I said its not a very good indicatior. Nov 30, 2021 · Nothing wrong with . 060" (3. It a 1993 302 block. Now maybe if you are saying it might need rebored more, that would be an issue, but if it just needs a clean up hone, 60 is ok. 56 square inches. Sep 9, 2004 · I have a 396/375 hp motor that is bored 60 over with a stock steel crank and rods. Oct 25, 2023 · A 350 engine bored 60 over involves increasing the cylinder’s diameter by 0. Oct 8, 2005 · My 396 is bored . Jun 13, 2017 · A while back I purchased a 454 block and had it bored out 60 over, don't know why 60 over sounded cool but it did and I'm knew at this (don't Judge me). This increases the engine’s displacement and can potentially improve its performance. 040 bore since the early 2000s with absolutely no issues. Otherwise, normal use and the occasional blast should be no problem. 125 to make the bore a even 4 inches, but I would have it sonic checked before I even tried. Dec 16, 2004 · I have a early 80's 351w that has been bored . 935 389 CU. Gotta multiply the bore by the ring gap factor to determine gap. Dec 14, 2021 · A piece of paper is about . if i sit at a red light or burger joint to long it climbs to about 215 degrees before i shut it off or the light goes green. 1 comp which were increasing to 13. 060 over unless you plan to race it consistently. 60 over, The car was in a nother buick, which a younger kid crashed, hence my thoughts, were this engine could probably haul. 200 inch, a lot of machining in an age of purpose built 3. (8) Then I would mike the pistons and check piston/cylinder wall clearance. Ran a mild cam 230 duration @ . 390. Times the stroke (3. T. 060 over for a 289. And when bored to different bore sizes ranging from 30 to 40 and 60 over, it becomes even more powerful. 360 over already, and the other was a D4 standard block. Dec 30, 2001 · Correct me if I am wrong but a 454 is 4. Old school offy intake and a 650 dp. 060 over. is . Mar 19, 2012 · . 060 over = 467 Yes you can stroke a 454 to over 500ci. I have seen pistons for . So then, what is a 350 bored 40 over? It refers to machining a 350 engine to increase the cylinder’s internal diameter by 40 thousand of an inch. 0/429, 7. Feb 17, 2012 · i found a few old threads using google. 070 over, so I don't know? When they checked the block it was a . There are a few 390 blocks that can be safely bored to 4. 007 total bore increase) and THAT will not cause the block to over heat. 875 Pi x 4. What is the bore size of a 283 bored 60 over? 283 bored . 060 over 402 pistons in a . 10 on the crank really just trying to clean it upmy understanding is the 60 & 70 block had thicker cylinder wallsreally concern heat issues, guess I should say for those reading it has j heads, and matching numbers hp exhaust manifolds and was looking to keep those rather the going with headers and stock radiator which has been May 31, 2023 · Understanding The Basics Of Chevy 350 Bored 60 Over. Mar 11, 2009 · 60 over 350 what cubes Jump to Latest 3. Now is this good for a 351W, I know this is pretty much as far as it can go on being bored but would it be wise to put sleeves in it? Aug 13, 2014 · Best pass 8. Mainly because the 400SBC is a Siamese bore unlike the 350 SBC which is a standard bore. Radius squared would be 4. 251" 454 standard stroke 4. 60 over if I wanted. 326 CU. 125 inches and the crankshaft stroke to 3. 060" bore X 3. 060 over already with some wear and rust to clean up; so I assumed the hole will only get bigger Jan 25, 2016 · I've never believed the old nonsense about over boring and over heating. I hope Its looks like the Dec 8, 2012 · I recently got a 289 that has been bored . 8/351M, 6. Times 8 Jul 23, 2009 · Awful lot of compression for a cast crank. I would like to get at least 600hp out of it, would like to know the best application for that. How many cubic inches is a 350 bored 30 over? Mar 8, 2002 · A . 25 + . 060 over should b abour 292 cubics A standard bore 283 was 3. Feb 6, 2007 · The motor in my bronc is 60 over, yeah it ran a little hot when I first put it in but with a new radiator it has given me 25000 trouble free miles and Ive driven the sh#t out it. im going to restore the car completely. 3. The increased bore size allows for increased displacement and power potential, while still using the same pistons and rods as a standard 400 SBC. 935 inch bore that bumps the displacement to 292ci. A hydraulic roller cam and lifters with a holley 750 carb. 060 over 340 block (4. 040 overbore. 040 over and the rest are standard bore. If you have it bored out that far you could hit what they call casting holes or blow holes where it has a bubble so to speak when it was formed and going that far may ruin your block. 75" stroke it would be a 377. 00″. 030" over, the other problem going over . 030 over = 460. 06 = 4. 935. If you build it with what you have definetly use a rev limiter or i am pretty sure that Aug 2, 2011 · I’m guessing this a 350 block bored . 047 over), its common for non thrust areas to be in the . Would I "bore" one to . Its a 454 mark iv motor gen V. 60 over is 438. It is at Hensley racing for refresh now. Is the engine being bored 60 a concern or pretty normal in these engines? Sep 28, 2014 · 56 olds 324 stock bore 3. Maybe bored if necessary. My concern is that it is bored. ive heard the max bore on a 396 is 60 over. Jan 26, 2017 · Still need to look at the internals, with the . 580 (= height of the cylinder volume calculation) bore 4. I will be sending the block to a machine shop soon to have in cleaned, sonic checked, new cam bearings installed, and honed. 060 inches to boost the engine’s performance. Sold 3/2018 --It was bored . 040 over = 462. Think about it; when you go to a . There are rings available for the 4. Aug 1, 2010 · Back in the '60's ,, i went . Feb 4, 2002 · Is there a chart that shows what a 283 bore would be . 30 over is only as thick as yer fingernail. 00 = 454cu/in Sep 13, 2010 · Most of them can go a LOT over. This place is like the graveyard for many type motors. 060 inches would be 4. 1) how is the . I put long tube headers, weiand aluminum intake and a 750 summit carb. Keith Black had . Goal for this engine is 450-550 horsepower. May 31, 2023 · It is an ideal choice for those looking for better engine efficiency and power. Com Free App Oct 13, 2017 · Been doing some searching and found someone selling a 1974 Pontiac 400, . Feb 26, 2006 · Hey I was wondering what is the exact bore size for a 400 small block bored 60?I sent some pics. From what we were told is that the 020 block was the same as a 350 block just that the bore was smaller and you could do anything to it you did to a 350 block. 60 over, but If I wasn't planning on pounding on it daily (heavy towing, high RPM, racing) I wouldn't have any problem putting one back together with a re-ring if it checked out. I might just be able to hone it, and keep it at . 060 you were originally looking for Jun 16, 2010 · At . xxx 30 over 3. 360 inches. I have a 283 but son't know what the standard bore is or what 30 or 60 over would be. Well, had a sleeve but in and honed it. 030-. i wouldn't go anymore than . 3L iron block castings can be bored all the way out to the 6. This wider bore increases the engine’s displacement, ultimately rendering it more powerful. and it dynoed out motor only at 600 hp and 540 ft. 040 over. Nov 24, 2001 · guys just bought my 67 396. 875 Pi x 11. A . Is a 350 bored over 60 safe for daily use? Nov 15, 2011 · Some blocks can go . 125 over on my old 283,,12. So I can either sleeve the one cylinder or take all cylinders to . 060 inch over, that is also zero decked into which is placed a 400 crank. 010. The bore and stroke combination would make about 388 inch engine. 40 but im bidding as if it will need . 60 over bored - i had this good friend of mine gave me a rebuilt 400 engine with only 10k on rebuild. 60 over motor but I only damaged rod bearing & crank not whole motor. Oct 20, 2006 · 370ci and yes a . 060 over bore, 6x heads, new oil pump, Ofenhoser intake, noisy gear drive for $850. [Modified by Pete79L82, 9:15 PM 10/6/2003] Feb 15, 2011 · Like I said in the title the engine is a 318 bored . 00" stroke. Nov 19, 2014 · Incidentally, some rare 4. Jun 27, 2005 · the block is 30 over now, was rebuilt sometime since new, but to rebuild again he said maybe . Apr 8, 2023 · 350 Bored 60 Over means that the engine has a bore of 3. 50 valves, a head that meets Aug 19, 2008 · I have the opportunity to buy a freshly rebuilt 428 (mostly stock parts) for a really good price, but I learned that the block was bored . One of them was an oval shaped outer circumference on the cyl bore to give increased thickness on the thrust sides of the bores. Some have told me this is way too much for a 428 and unless the block was sonic tested, magnafluxed, microscoped, and psychoanalyzed to ensure it was solid and stable, that overheating and/or Apr 13, 2010 · What year? Just so you know the 5. 060-inch on your 283, you end up with 3. 0 Ford, round about 1986 (when they went to roller cam) recieved some block upgrades. 720 3. May 10, 2003 · Anyway a 60 over bore in a 350 would yeild about +10 ft lbs. 750 to 1 compression. I ran the engine for 14 years after the rebuild with no problems or overheating, 11 sec. 14159), that's 13. 070" pistons in stock. Jun 22, 2008 · I had the same situation on my 454, it was . 040" over. Also stock heads, i think that my weak point. 6/400, 351 Cleveland - 400 . May 31, 2023 · A 350 bored 60 over refers to a modification where the engine block of a Chevrolet 350 small block is bored out 0. 875", so 60 over would be 3. 090 range! Panneton Bros. Nov 24, 2017 · The 340 block I have is dated 8/29/71 or 9/29/71 (but according to the oil pan stamping numbers it was originally built for a 1973 model vehicle). 120" over with one and . 60 Over? - I see a 400 engine on Craigslist, but it says bored . 750 60 over 3. Times pi (3. It`s said that 307 blocks were really meaty and could be bored . 30 over is only . if they checked your block like 65fordguy had done it could show up thick on one side, and thin on the other side because of core shift during the block casting Apr 5, 2004 · the 400s do have a tendency to run hot when just idling. 60 over? I want to add twin turbo to the engine or should I get another one? thanks guys lmk. Among other parts. One was a D0 (1970) mexican block, bored . :wink: Mar 17, 2022 · C3 Tech/Performance - 400 Bored . 8475 37. If your machinist can do sonic testing, have it done first. 060 over 302 would be 310cid bore x bore x stroke x no. a reputable machine shop should always sonic check ANY block when exceeding a . i know a friend who bored one . I personally have gone . Jun 12, 2023 · A 327 bored 60 over refers to an engine block that has been effectively bored out to increase the engine’s displacement. Am trying to make it so I can drive it. The problem with adding bigger fuelie style cylinder heads like the 461 or 462 is that, while these heads increase airflow over a stock 283 head, this also increases the combustion chamber volume. 00" bore and 3. So . Ran a 3 core radiator tho. 50 with . The only way to get it to start is if I set the timing at roughly 35 degrees what I believe is before top dead center timing mark on crank is under timing marks on engine. If it's . IN. 060 over since i bought the . 65 roller rockers, edelbrock 800 cfm carb, and hei distributor. A sonic check is a very good idea. range and street driving. I bought it broken, but not from over heating, one of the valves got bent and the piston beat the hell out of it and you can guess the rest. I have a newly rebuilt 289, 60 over sitting in the shop. lbs Oct 27, 2010 · I have over 1000 passes on a . 00 30 over 3. I run a 3. At that rate . 060 over and lived through long abusive lives. We had a customer bring in a block and it sonic tested . Sep 6, 2011 · Just had a Big Block built and was told it was a 454 bored . you had a 383 (4. 060 over on a 350 block I would sonic test first as we have not seen many blocks that would make . 50 inch stroke, . xxx Thanks Aug 17, 2012 · Took it a part and it was already bored . Maybe something to ponder going with a little less compression or upgrading to some better bottom end parts. 060 over and be used in a performance application. Standard bore for a 460 is 4. Aug 31, 2006 · To bad you do not live on this side of the country. Now on a 400 SBC that's pushin it kind of close. The motor has been bored . 060" over 402 piston which is . Dec 9, 2022 · 283 bored . Sep 21, 2023 · A 427 bored . 60 over with a 4. Before I had the motor built and it was bored 30 over, it never had any overheating problems. Simple math. 875 3. 60 over, and a 454 Crankshaft? Any info is appreciated, thanks. 000, 4. 080 over is 4. 060 and if you go more you need to sonic test. 000 (= diameter, so the radius = ½ of Jan 30, 2005 · FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - . Sep 20, 2023 · What is the bore size of a 283 bored 60 over? 283 bored . 090" over for a 396. 060” larger than stock, resulting in increased power and performance. 030" over not . Oh ,the other post is gone. You can take it to a 350 bored . A 350 . 76 inches) that's 51 cubic inches. 090". 1 bore right? - Hi All, Setting up the rings on my fresh 390 today. 060 over too much on a 460 block? I saw in the Pat Ganahl, Ford Performance book that its not recommended to bore one over . Apr 13, 2008 · Well, I finally took the engine into the machine shop last month and found out that the engine had already been bored . 100 over for a BBC is acceptable. Jun 15, 2011 · Its bored 60 over 13. To bore an engine, specialized tools are required, and precautions should be taken before beginning the process. If you do find . The BORE is the diameter of the cylinders. 1 Oct 23, 2020 Aug 10, 2008 · 1988 T-Topped GT 5 speed 3. 030″. Oct 6, 2012 · So from sounds of it can't use . 060/2)^2 x 2. and a lower HP curve with increased HP through the bottom end. 30+ is a 355 5 more cid. 070" is feasible ,verify that you can get them for a 396. but wanted to see what u guys thinkfriends selling a 5. i will bore the min i can, it's 30mi from me. Jan 22, 2010 · Over heating is one problem you can have going more than . Radius would be 2. 00" (. The heads are 353049--opened chambered. 87 at 150. Once I rebuilt it though, my temperatures went through the roof. 25" bore x 4. Had it done for my 65 and sold the car with the old engine in it. '66 GT350H-3 time cover car - Car Craft July'77,Modified Mustangs and Fords Feb2011 ( w/article), Mustang Monthly June 2014. The only thing that I do know is, obviously, when boring the block out that much, the walls get thinner, which can either lead to cracking, or cause the motor to run hotter. 75" stroke), you now have a 4. 60 over seems too much . However, there are disadvantages to boring your 350 60 over which you must take into account. It has KB Hypereutectic which require special top ring gapping. The guy who rebuilt my motor had bored it . If you had a stock 4. 060 safe I'm kind of worried, but you guys know more than I. By better I mean, GM 58-60 cc 1. The longer stroke of the 350 is a help with the torque- Sure the 327 is a revving engine, and that makes it idea for light vehicles. I am looking for something like this std. Thus, you could use . 100 bore). 60 over and fried it at the local oval track from too much heat. _____. 060 inches larger than its original size. The sonic test should be done on any block that is going to be bored, even if it's . Dec 12, 2013 · If the engine is already at 60 over, which is the max I would go and feel safe, andyou really need to check the cylinders w/a dial bore gauge to make SURE there is no taper in the cylinders. I had a bad experience with a 350 block, bored . What you are doing is similar to a GM factory Ls6-Ls7 engine,4 bolt mains,7/16" rods and a steel crank. 040" -- Okay. 030 from each side of the cylinder. Here is the information from my source: The 351M/400 engines have "thin wall" castings and can not be safely over-bored beyond . 60 over (hence 399 rather than 393). 060 over 455 create a 'square' bore/stroke ratio, and is probably considered the most desired over bore config on a 'stock-type' 455 (no stroker or longer rods). And other checks like line bore and cam bearing tunnel should be checked before you spend money. Also, it is VERY PROBABLE that any 396 will go to . 060 over and the guys machine shop says it just needs to be honed to be ready to go. 096 inches, plus . 48" crankshaft stroke which really only gives Feb 13, 2013 · The engine I am purchasing has been previously bored . 30 Duntov Cam ,,Rochester Fuel Injection/ later Dual Quad AFB's , ,,3 speed trans at first ,,then a Muncie M-20 4 speed after i saved up for it ,,ran it in my '54 Ford Pee Cup when i was in the Air Force in Alaska , fer 2 years ,,went like STINK Apr 8, 2003 · Hey Jason. 7854 = cid An 8" rear is fine for cruising even if you get on it a bit. i have heard good and bad of a 400 A 289 bored 60 over is. Oct 24, 2011 · Mine was bored . 94/1. I thought you couldn't bore 400's that big because of the cooling passages? Also, any thoughts on building a 400 for Vette use? I'm loking to build a torquey small block to give myy 77 more oomph coming off the Apr 28, 2009 · My former engine was bored . 60 and not have any thinner bore walls than you would on a 350 bored . 15 from each side of the cyl wall. If companies make . Aug 11, 2006 · Im trying to buy Eagles Rotating Assemble for my 454 block that is bored 60 over from summit racing but if i go to bore size and click 60 over it goes to 496ci, And if so does anybody have a web site where i can get a Eagles Rotating Assemble kit that is bored over 60 thank u Jun 12, 2023 · A 454 bored 60 over is an engine that has had its cylinder bore increased by 1/16th of an inch, resulting in a displacement increase of approximately 42 cubic inches. I was wondering if all the original factory blocks are the same weight/style/thickness and who may have Jul 3, 2011 · I`ve seen several late 70`s blocks crack in the bore and in the lifter valley. Jul 18, 2016 · The engine was rebuilt, then ran for 5k miles, and then yanked to sit in a field for a long time. I thought you couldn't bore 400's that big because of the cooling passages? Also, any thoughts on building a 400 for Vette use? I'm loking to build a torquey small block to give myy 77 more oomph coming off the Feb 3, 2013 · 1972 pontiac 400 bored 60 over ported heads 455 crank my first full build Jan 12, 2012 · cc i meant cubic, i thought it was bored . Oct 6, 2003 · . There will always be people who do the undo-able without problems. 41” bore and 4. The shop called me back and said they had to have it bored . Is a 350 bored over 60 safe for daily use? Mar 25, 2009 · My 69 block was just sonic checked, it was bored 40 over and I recall numbers like 220 and 230 so I was safe to bore to 55 over. Valve covers are the old Cobra Oct 27, 2008 · Had a 302 bored . Aug 30, 2002 · It is definietly . Jan 22, 2010 · I do not have a B body, but sure do appreciate the information on your site. 50 a gallon) I thought I would make it a stroker. 030, 4. 1 to run methanol we had the engine sonic tested first and it came up trumps, but i have been told not to push them past 40though especially when stroked + high HP. Engine was rebuilt several years ago but never installed and looks in pristine condition. Dec 3, 2010 · im trying to find a good block for my 94 gt streetable and i found a 351 thats bored over . 060 over 402 will be 414. 030" bore X 3. Jan 7, 2010 · Hello, You can take this with a grain of salt, but I have bored a lot of 230s and 250s . 13 which is the stock 428 bore. It is EXTREMELY UNLIKELY that you could ever notice the difference between an equally built 408 vs 414. Jun 30, 2005 · Hey guys I had a 351w in my cougar but a bearing spun and broke number 7 piston into pieces. 50 inches and a stroke of 4. It involves enlarging the cylinder bore diameter of the engine block. core shift and mythical thin wall castings (THIS IS NOT YEAR SPECIFIC but is most often found in mid late 70s-up blocks) contribute to the problem. 60 over, making it 388 cubes with the 3. 60+ would be 10 more cid. Engines are the beating hearts of any automobile, and enthusiasts always look for ways to improve their performance. Can you professionals tell me if this is a good street/race motor. 371 had a different stroke and a 4" bore if these are "60" over 371 pistons get a 371 Apr 28, 2009 · It has been noted that my 360 has already been bored . 1209 x 2. 030. two piece rear main seal). E. The kid then purchased another buick with a 455 already in its place and he swapped over the heads, intake and timing cover, to which I beleive, must have been the Mar 28, 2010 · I've been running my original 5 bolt block with a . 10 will clean it up, . 030 or 0. It's a 10/12/71 block. 00 inches to 4. 60 over bore on a 350 SBC. 040 over is preferred. 875, acquired a set of nos jahns pistons 4. 212 60'. 498 lift. Im building a 414 stroker. 040" and . My blocks temperature stays in about a 10 to 20 degree range no matter the conditions - even stuck in a traffic jam at 100 degrees plus ambient temperature. 60 over to a 310 new bottom end gt40p heads ford racing headers 70mm tb and egr spacer b303 cam edelbrock uper and lower intake calibrated maf (im 1987 so this is kool) 24lb injectors. Who knows why someone would do that. 0L engine's 4. 25" stroke. Also has forged pistons with a 10. the thermostat thats in it now is a 190 and brand new the radiator has an oil cooler on it but should i buy a bigger one? thanxs for the help carl Jun 30, 2019 · General Motors achieved the 400 SBC engine’s displacement by increasing the bore to 4. It's a 1984 350 block 4 bolt main and it's bored 60 over with flat top pistons 450 lift comp cam and 7,000rpm rated lifters. i was able to save the head as well, the shop were I had taken it tig welded it and machined Feb 8, 2014 · Ok ive been looking online and i see all sorts of answers. of cylinders x 0. This was because the original bore job that was done on it was so horrible that it took going 60 over by another machine shop just to clean everything up. As reported by Lingenfelter Racing's Jason Haines, that's because (you Aug 16, 2006 · Let's make sure we are on the same page. Its a 302. It was bored 60 over and flat top pistons where installed. I did a couple of 454 blocks that could only be bored . Stock Bore 4. If you look at a foreign car the over size measurements are in mm and are smaller. This one has a Boss pan, windage tray, oil pump from a Boss, 60 over flattops, 351 cam, 302 heads with oversize valves, torquer highrise. After running the numbers it turns out it is a 1996 Vortec 7400 tall deck block (427). Sep 20, 2008 · I think the take-home message here is that boring 60 over is not an effective method for increasing performance. A local engine builder with a good reputation has a 399 stroker available for a good price. 8572417 or basically a 439. 40 over and still had some marks on 2 cylinder walls up high. i have 180 thermostat and on a hot day idle in traffic it never runs over 200. My question is can you get it to 522 with the 4. The machine shop had no problem with that big of a bore and said there is plently of cylinder wall thickness. 060 max, badly core shifted. Nov 9, 2011 · General Q & A - 502 overbore, how far can it go? - i have ta chance to trade some parts for a bare genV 502 block with main caps. hpqwgm jtxmlp bfoec rew fbmenc syvdwe mbbwwpia bvbng bfkk fbywx