1989 ford 460 compression test specs|Compression ratio on 460 question : dealer I have a ford 460 that was re-built by a machine shop before I bought it here are the specs: 460 .030 over all stock bottom end, D3VE heads stock, 9-1 compression, unknown . Resultado da 10 de ago. de 2023 · 在 iPhone、iPad 和 iPod touch 上下载“nPerf 互联网网速测试”，尽享 App 丰富功能。 nPerf 不仅仅是一个简单的网速测试，它为您提供最佳和最全面的移动连接质量测量工具，速度高达 1 Gb/s！
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What is the compression supposed to be in the 86' 460ci cylinders? I tested mine today with all eight cylinders and got readings between 125lbs to 145lbs. Reply LikeBig Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - 460 issues - I have a '91 F . I have a ford 460 that was re-built by a machine shop before I bought it here are the specs: 460 .030 over all stock bottom end, D3VE heads stock, 9-1 compression, unknown . squirt a little oil in #7 and see if compression comes up. Also make sure you have throttle wide open during compression test, and battery is charged up. You have a 10% .
I suggest rerunning the compression test with all plugs removed and at wide open throttle with ignition disabled. Any deviation of more than 10% is usually a sign of a worn . I don't think the oil control ring plays that big of a role in the compression test, but putting the light oil in each cylinder will tell you if the compression rings are bad if the pressure . Warm up the engine, shut it off, then take all the spark plugs out at once and block the throttle wide open. Put the tester in one spark plug hole and crank the engine over 4 . The compression was low in one hole (20psi ! ) due to a burnt valve, others were 50, 70, 115, 120. all over the map really. When I tested the compression after I installed the .
Using your numbers I get a effective compression ratio of 7.88:1 which will run on unleaded although you might need premium. I ran the KB 137 in my 460, with 92cc heads they .
Would anyone know the approximate compression of a 460 using a replacement 460 pistons (1973-1979) with a set of DOVE heads? The engine now has D3VE heads and is . Procedure: Engine at operating temp. All plugs removed. Throttle held wide open. Turned each over x7, as per Haynes. Two numbers are listed below; the first number is what . Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - Double-checking Compression Numbers on my 1989 460 - Hello, everyone. Thanks in advance for double-checking this before I have to take the loaner gauge back to O'Reilly's. Problem: This 89 F250 I bought is fouling plugs 1, 5, 7, and 4, though only a tad, tad bit. I'd invest in a leak down compression tester, you also need a good air compressor. The system is, put piston at tdc compression/power stroke and pump 100 psi air into the cylinder and gauge will show how much .
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Fitted with a new camshaft and a lower compression ratio, Ford's biggest mistake was a head design for that year that would virtually eliminate the quench area, which lead to numerous problems with reliability and detonation .
Here’s a breakdown of the Ford 460 engine’s specs, focusing on key details that made it a favorite among truck owners and performance enthusiasts: 1. Displacement. Cubic Inches: 460; . The compression ratio of the Ford 460 engine varied depending on the year and application. Early versions of the engine, especially those used in cars, had . Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - '88 351w Compression test results, specs? - Hi, I went to look at an '88 van with a 351w, we did a compression test and got: 1 - 180 2 - 185 3 - 190 4 - 170 5 - 168 6 - 170 7 - 170 8 - 173 We think this is pretty good, number 3 seems a little high compared to the. The compression ratio flat sucked in the smogger era for the 460. . I just entered the specs given from that book for a '72 460 and came up with 8.06:1. I even used the high end of the chamber size range (92.9cc) .I'm assuming they used the same pistons as '73-'87 (-22cc) . 460 Ford Forum. 674.8K posts 37.8K members Since 2006 A forum . Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - 1989 460 compression - Hi, I have been having a problem with misfiring. By pulling the wires off the distributer, we found the second cylinder back on the drivers side wasn't firing. After testing that cylinder, we found to have between 110 and 115 compression..
The Ford truck and car shop manuals say ".compression pressures are considered normal if the lowest reading cylinder is within 75% of the highest". When I did my 460 with 60K miles on it I got 4 cylinders @ 150, 1 cylinder @ 145, two cylinders @ 125, and one cylinder @ 118. The engine was at normal operating temperature. No oil was added.
I have a question on E7TE compression height and CC vs F3TE. A little background here. What I have is a 93 F350 w/ EFI 460, runs on both gasoline and propane. I did a compression test to the engine not that long ago, and I was getting in the range of 130-140 PSI, to me that sounds low (I am an automotive service technician). Would anyone know the approximate compression of a 460 using a replacement 460 pistons (1973-1979) with a set of DOVE heads? The engine now has D3VE heads and is probably in the range of 7.5:1--8.0:1 compression. I figure losing almost 20cc in the combustion chamber should maybe bump compression into the 9.0:1+ range. Any thoughts?Repeat test on each cylinder. Indicated compression pressures are within specification if the lowest reading cylinder is within 25% of the highest reading. . I have a 1989 Ford F250, 4WD, with a 460 EFI and factory dual gas tanks. My mechanic says he needs a wiring diagram for. 8.3.2023. Allen Taddicken.
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - 1989 Bronco XLT - 5.8L Cylinder Compression Test Results - Good evening everyone, I am having a devil of a time in finding what the correct cylinder PSI range is for my full size Bronco. I have owned the Bronco for approx 1 year and have 0 power under load issues,. Checked compression on this 1975 460, all cylinders good (125), however, #4 has hardly any compression. . then maybe a leak down test. Anyone have any other recommendations? Also, all the plugs looked good, except #4 looked darker, like oil. Save Share . Ford Muscle Cars Tech Forum. 955.3K posts 75.3K members
Repeat test steps 3 - 5 on the remaining cylinders.. Let's examine your test results: CASE 1: One or two cylinders had a much lower compression value than the others.Up to a certain range, this could be normal. To further interpret these test results go to: Interpreting The Compression Test Results. CASE 2: Three or more cylinders had almost no compression or 0 PSI compression. I bought a nice run around 1978 F250 with a 521 stroker with supposedly 6000 miles on the engine (mileage seems legit) The receipts say it is a scat 4.150 crank, kb318 .030 hypereutectic pistons, 60679 edelbrock 75cc performer rpm heads, comp cams 268 camshaft, hedman headers, edelbrock rpm air gap manifold, gm style HEI distributor, it had a 625 .
Imma trying to find the compression specs for my 83 302 block, I did know them but forgot, anyways if anyone has a link , answer, or the specs, that would help out for a routine maintance on my motor. BTW I did a search and found everything but the compression specs in here and that google thing, lol Thanks Steve Might do a cranking compression test. Along with those #s and your cam duration, someone could know about what static comp you have. . 460 Ford Forum. 674.8K posts 37.8K members Since 2006 A forum community dedicated to Ford big block owners and enthusiasts. Come join the discussion about performance, modifications, horsepower, tuning, build . In 1972 Ford reduced the compression ratio in an effort to get better fuel economy out of the engine. This resulted in the 1972 through 1984 460s producing 212 horsepower and 342 pound-feet of torque. . The Ford 460 is capable of making over 500 horsepower and over 500 pound-feet of torque if they are built right. These are massive 7.5L V8 .
Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - compression numbers?? for a 7.3 IDI - I have a 89 7.3 IDI that has QUITE a few miles on it in a F-superduty rollback tow truck. It is smoking slighty and I'm wondering just how close it is to needing a refreshening. I know I have to buy the tester for a diesel, but what kind. Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - 460 compression ratios - I am building a 460 (possibly a stroker) for my truck. It will be used for mud bogging but I want to put 87 octane in it. What compression ratio and bore size is best for this application?? I found a stroker kit that says 4.300 stroker.The Ford 460-cubic-inch, V8 engine has a cylinder bore of 4.36 inches and a crankshaft stroke of 3.85 inches. The output for 460 engines built before 1972 is 365 horsepower at 4,600 rpm and 485 pound-feet of torque at 2,800 rpm. The compression ratio is 10.5:1, and fuel delivery is by an Autolite four-barrel carburetor.
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - 460 EFI Compression ratio - After a lot of reading about trying to get better with a 460 is kind of not worth it you spend to much money on mods an get low effects right? If that was true i thought about lowering the compression ratio so i can run 87 octane gas.. What are the stock specs for a 1973-1979 & 1980 and later 460 ford truck engine. Also what do you think of these possible rules. . Get a Katech "whistle" for compression ratio, a P & G meter for cubic inches or simply don't have any rules about them. A "paper rule" is absolutely only a suggestion when there is no consistant enforcement .
My name is Rob, I just bought a 1989 Ford F-350 with a carbureted 460. The truck is in really good shape, the engine was rebuilt and has about 1,000 miles on it according to the last owner. . First order of business is to do a hot cranking compression test on the combo. This will help establish whether or not the static c/r is sky high. A low . 1987 - 1996 F150 & Larger F-Series Trucks - 1989 F250 7.5L 460 Overhaul/Compression Issues - I actually posted the cut and paste below in the big block forum, but did not have too many replies. So, I thought I would repost here, hoping for a little sage advice. The main thing: I understand I won't know the whole story.
Hi guys does anyone here know what the stock compression ratio for the 1988 460 EFI motor is. there are no mods at all Thanks . 460 Ford Forum. 674.8K posts . big block owners and enthusiasts. Come join the discussion about performance, modifications, horsepower, tuning, build specifications, and more! Show Less . Full Forum Listing.
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Another option would be to replace the heads with some 1968 - 1970 heads. They were close chambered and higher compression. I just had my 68 460 rebuilt, had dished pistons installed and the compression ratio was calculated by the machine shop to be 9.3:1. Damn thing runs like a stripe-assed ape. Great torque. Good for pulling over tree stumps.
compression reading for a 460
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1989 ford 460 compression test specs|Compression ratio on 460 question