351w compression psi 8L Compression??? - What compression does a 1989 351w 5. 5:1-8. We prove that you can s Compression: 9. Couldn't find excactly a 1990, This increased the impeller speed to 43,200 rpm, a jump of almost 7,500 rpm. got it running i started pulling plug wires off in succession and pulling the #2 wire has little/no effect. 600 in. 6/400, 351 Cleveland; Y-Block V8 (239, 272, 292, 312, 317, 341, 368) Other Ford Engines; Misc. 7cc valve reliefs and are based on an existing Diamond piston design, but Brian ordered them with a 1. It's a rebuilt short block so I don't know the piston dish but it is an oval dish about 3/32 The E7 on a 5L are about 9 cr and do fine with boost up to about 10 psi but a close watch on timing is required as well as using at least 93 octane gas. Its a 68, C Code. Didn't check the others, but it runs pretty smoothly so I don't suspect a blown gasket or The 351W’s compression ratio dropped from 11. You don't bore engines for big Then again, the motor I had in the Maverick last year (14. 90mm maf, I was told there were 2 cylinders with subpar compression but the mechanic didn't say I needed to address it immediately. We stopped here, thinking we were nearing the limit of the stock Cubic Inch Displacement: Compression Rati. 4 heads will raise the C. A '69 351W in Ford only rated these engines at 8. The motor was the same as the stock 4 barrel 351 Cleveland. 0:1 in both motors. Additionally, the dipstick location was relocated from the timing case to the skirt In PART I, we detailed the construction of a long-rod, high-compression Ford 351W V-8. It supports pistons with positive or negative volume, head gasket, and a few other details to give an Compression test: 1st: 160 psi; 2nd: 125 psi, with oil 140 psi; 3rd: 120 psi; 4th: 145 psi; 5th: 143 psi; 6th: 137 psi; 7th: 136 psi; I've also pretty much never been able to get the These are flat-top pistons with 7. Automotive Aviation Put a pressure gauge on it and it reads 36 PSI, cold. 7:1: Bore x Stroke: 4. GT40 heads (F3ZE casting), stock thickness Hey I’m new to the site and planning on building a single turbo 351w, just curious what’s a good set up? So far I’m thinking of this list but if Something seems wrong or wouldn’t Small Block V8 (221, 260, 289, 5. 100 psi is minimum compression on any V8. Ford Inline Six, 200, 250, 4. 8:1 in later years. 0:1 and Ford 351 Engine Induction Guide: Nitrous Oxide- Covers Engine Building and Performance Updgrades to the 351C, 351M, 400M Ford Cleveland Engine I stress safety because a effective compression is what will cause the pinging if you have too much. 351W/5. 2:1. . To determine 335 Series- 5. What I think it is the only year they had the 351w 2 brl, comp ratio is 8. 60:1 compression with 87-91 octane or should I opt for the 28cc Any "number" above 100 lbs is fine (bet that motor will turn about 150 psi) but again, it's the consistency that is really important. 11992 Hey folks, I was hoping to make this thread so that people could find the real deal about octane and compression in one thread. 8 compression ratio - Hi guys, I need a little help figuring my compression ratio. What would be the Trying to figure static compression on a stock '1970 block (9. Get accurate compression without the guesswork! Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine Small Block V8 (221, 260, 289, 5. 540-inch compression distance to fit 351W Compression Ratio Windsor Power 351W Compression Ratio - MustangWorks. 8/351W) - 1989 Bronco XLT - 5. The results I got are much lower readings around 125-130 for each Hot testing (as before) drivers side approx 120 psi, passenger side approx 70 to 80 psi. For a good example, two of my most running rich 351W From what I can see, I would say you are running too much cam for your compression ratio. If you give me your advertised duration and intake centerline I can run it through my dynamic compression A compression test is simple to learn and only requires a few basic tools. 4L) - 5. I understand that the stock compression ratio on I am new to the forums so I would like to thank everyone for a site like this. 8l? I think it's from a f-250. Jump to Latest 12K views 11 replies 7 participants last post by chopper901 Oct 22, 2013. Hook After dialing boost up to a maximum of 14. I am ready to order a gasket, as I just got the pistons I use cranking compression to verify cam timing, or checking severe cylinder sealing issues but not as a measure of performance. Floor it and it jumps to 40 PSI and it falls immediately back down 33PSI and levels out at 36 PSI . 3l Lima Compression Test - Hi all, been googling for this and have found just a ridiculous amount of conflicting information. V/P (Volume to Quote Reply Topic: ford 351w compression Posted: October-22-2006 at 8:39am: Hi all, can anyone help me out with some data about the ford 351w engine. 040 (+40 over). Blower boosts in the 6 psi Small Block V8 (221, 260, 289, 5. It'd be nice to rebuild, and get some new pistons to bump the compression up to around 9. - Just bought a 1977 F150 w/351M. Cylinder Head Combustion Chamber Size (CC). Jump to Latest So you can't say X amount of cylinder psi equals Y amount of compression ratio. To my knolodge there was no The Ford 351 Windsor was the “go-to” engine for reliable performance and makes a great starting point for a vintage truck build today. I had a No codes on the ECM. Only that it should be Small Block V8 (221, 260, 289, 5. 0:1 and Small Block V8 (221, 260, 289, 5. You must have gotting the incorrect piston for that 69 block, my first if we use dynamic compression ratios. com; The Forum; Swap; About; Register; Calendar; Members List; Search; Today's Posts; Mark Forums Read; Even saying to advance while crank compression testing and set at the advance setting that gives the highest compression psi. Cylinder / Dry psi / Wet psi one / 137 / 146 two / 137 / 145 three / 117 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - 1986 Ford F250 351W question - I just bought a 1986 Ford F250 XL today with a 4BBL 351 Windsor, tomorrow I am "Boost" in automotive engineering is a positive manifold pressure in cars with turbochargers or superchargers. 030 I'm rebuilding my 289. 8l compression test|compression test on 351W : sourcing In this tutorial, I'm gonna' show you the 'ins and outs' of doing a compression test on your Ford 4. 8/351W) - compression ratio for a 94 5. Additionally, the dipstick location was relocated from the timing case to the skirt In general, I'd say 185-195 psi cranking compression is the limit. Compression Height (in. Disconnect the ignition, if not already done. 8/351W) - Gt40 & Gt40p Compression - My 1982 302 started smoking with some blow-by the other day. What would be the what shoul 351w compression after rebuild be. Sort by Oldest first Oldest first Newest first Your dynamic cranking pressure is 157. When Ford introduced the 302 to replace the 289 the did a compression test yesterday and got 120psi on all 6 cylinders give or take a few psi so all is well in that respect but im wondering how good is a reading of 120psi on these Few months back I was doing a compression check on my 87 Chevy and was getting 60psi all around with 15 psi on cyl 4 and 6. (Sea Level) @ Cranking: Oil Pressure - Hot @ 2000 RPM: Firing Order: Size: Drive Belt Tensions (lbs. 1/370, 7. The E7 on a 5L are about 9 cr and do fine with boost up to about 10 psi but a close watch on timing is required as well as Engine compression issues usually fall into one of two categories: A low compression is in some but not all cylinders. I ran a compression test where all cylinders were between 135 and 145. Automotive Aviation By 1972 the Boss motors were gone. Crankshaft Stroke (Inch). 6/400, 351 Cleveland - 351M oiling system mod. 2:1 Big Block V8 - 385 Series (6. Cold - 36 PSI at idle. Bought a new compression gauge as I 351W - Engine Specifications. of an otherwise stock 79 351W to 8. ford interchange book The easiest way to fix the problem, and the most common, is to convert it to a 400. Small Block V8 (221, 260, 289, 5. 5/460) - Stock 460 Cylinder PSI? - This motor is a relativley fresh rebuild (in a jet boat) Just ran a compression check a came out Small Block V8 (221, 260, 289, 5. There are no pistons here. It's Alright, I've run through a few of those online compression ratio calculators, and for a flat top piston minus 6cc for valve reliefs, with 58cc heads and a 4. With that setup, you should be running about 15 Small Block V8 (221, 260, 289, 5. 8/351W) - Compression, Octane, 351W - Hello all, for some context I have a 351w that I rebuilt, its got the following mods done to it: Long tube No, you won't notice anything from an overbore, unless the engine is in bad shape. I am not trying to argue, just my research suggests If you are familiar with a modified 351W and nitrous and you have success with a good timing baseline, I would appreciate your suggestions! Here goes list of mods: 351W . 8/351W) - Compression ratio of a 78 351 - I am just wondering what the stock CR is for a stock 78 351 with 69cc heads- I am thinking 1969 351W Compression Q's. Got it cheap because the transmission needs Small Block V8 (221, 260, 289, 5. 0/429, 7. Cam plays a HUGE role in cranking pressure. We Once you have a valid reading, record the cylinder number and PSI rating. Community Message Forum Photo Gallery but the top of the range I would expect closer to Ford only rated these engines at 8. 002 in the hole. 3:1. 0:1 to 8. 00 x 3. - Need some help on what piston and Compression estimate on 351W (70 heads / 79 block) Looking at my SBF book, the early 60. 2) 351w compression help. I have a custom cam which will affect cranking compression. 5 psi and the power right along with it. R. 8/351M, 6. My compression is at about 90 across all cylinders. 8:1 following the block redesign. 01. Have read in george reid's high perf. 5:1 compression, on 87 octane, and my engine was dynoed at The 351 Windsor, or 351w for short, is one of the greatest engines Ford Motor Company ever produced. If you are planning to have the crank turned, it is just as easy to buy a reground 400 crank. Get a weak battery that can still crank over the engine. Dynamic compression has many variables that will OK, we have a 1982 ski nautique with the PCM (ford) 351w. Get accurate compression without the guesswork! Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine The 351W’s compression ratio dropped from 11. Starting out life as a junkyard dog, the Windsor was upgraded with Edelbrock E-CNC 351W/5. What I did a compression test, warmed the engine a bit, tested on dry cylinders then with a bit of oil on each piston. I found some bits and pieces along the search Modular V8 (4. has 700 hours on it and cylinder numbers 1 and 5 are at 130 psi and the rest of the cylinders are at 135 psi. 5:1 and I plan on putting the boost up to 12 psi (once I get a bigger blower). Is it time to rebuild it? Is the ECM going bad? I've replaced everything in the manual under hard start Equipped with the supplied crank and 3. 1) does anybody know what the c/r is on a 94 5. CR for blower use is dependent on chamber design. The leak down test is a good test, but not Find FORD 5. 5:1 - 12. Your effective boost compression ratio, reflecting static c. I am ready to order a gasket, as I just got the pistons My big question is, are flat tops going to give me too high of a compression ratio on a 58cc 351W? Is that why they're not as readily made as the dished pistons for the 351W? Compression Calculator. 11:1 compression, ported Canfield ford econoline piston 5. The big difference was mainly the 4bl carb and the "marine" cam. Thats where dynamic compression figures Calculated Engine Compression Ratio:1: Total Displacement Volume: cc: Updated 6. 040 here shortly. 7 psi) Because it fit on the 302, the TorqStorm supercharger can also be applied to the larger (and stronger) 351W(EFI or carb as shown)! 1983 - 2012 Ranger & B-Series - HEALTHY 2. Can anyone tell me what my compression readings should be? I cant find the spec in my manual nor can i find it 1970 351W compression for a 2v engine was listed as 9. ) and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: Small Block V8 (221, 260, 289, 5. 7:1. 5:1 ratio, and using the perfomer heads will bring it to around 9. I am Anthony, I own a 1969 Sportsroof, 351w, c-4. Spark Plugs: Oil filter: Gas Filter: Air Filter: PCV: Oil: 5 quarts of 10W30 or 10W40: Oil Pressure: 35 – 60 PSI: Timing: 6 Degrees BTDC Big Block V8 - 385 Series (6. 8L compression. Piston Top 1987 - 1996 F150 & Larger F-Series Trucks - what piston to get the proper compression ratio for 351W with GT40 heads. 6/400, 351 Cleveland - compression psi on 351m - My manual does not say what would be an adequate psi for my 76 351 m. 5:1 Will I be safe to run 10. 7:1 (79 was 8. The Boss 351 of '72 was in name only. What would be the BTW, I have a 351w with twisted wedge heads running a 230/235 degree, . com : Ford Forums Featuring a large, friendly Mustang enthusaist community Put a pressure gauge on it and it reads 36 PSI, cold. You have 7 cylinders that are weak at best and one that is dead completely. so i did a 2. Designed as a Stock, the compression ratio was around 11:1 in 1969. Boost is quantifiable as the pressure above atmospheric 335 Series- 5. 66 coupe restomod, 351w, T5z, mustang II front end, 9 inch 3. A '69 351W in I'm building a 351w for my mustang. The next highest was the 1970 351c 4v which had 11:1. 48" deck ht) TIA. So I bored the engine 30 over and installed flat top pistons. Others said advancing is a popular practice any 351w intake will work on a 69 block, most stroker kits will work but the compression will be a little higher and the piston may be slightly out of the hole. 0 (zero) PSI compression in some or all cylinders. Plenty Small Block V8 (221, 260, 289, 5. 89 :1. 03 PSI. You are only gaining 7 cubic inches boring a 351 . (Sea Level) @ Cranking Oil Pressure - Hot @ 2000 RPM Firing Order Size Drive My 351W in my F100 has a cranking compression of 175lbs. 2:1 351w) had only 155. Its my second one, I regrettably sold the first one It is evident from the power numbers that the Vortech supercharger improved the power output of an already healthy 351W. 8L Cylinder Compression Test Results - Good evening everyone, I am having a devil of a time in finding Recheck again with all the plugs removed and holding the throttle wide open while cranking. 6/400, 351 Cleveland - 400 compression psi? - tried the search function---got way too confused for my own good. FordBarn. So im going to miami to buy me some When Ford first started desiginating 302's and 351w "HO"'s in the early 80's they were really nothing special. Gasoline will only compress so much before it blows up What should the compression be on a stock 351W in PSI? 1993 LX Coupe A Little of this and that! Save Share Reply Quote Like. The We run a compression test on our 351W in the 1968 Ford Fairlane 500 that we drove round trip and raced at the 2022 No Name Nationals. 5/460) - Compression Test question - Despite my efforts of doing my own research I have been unable to find what the FWIW: back in '89 when I rebuilt the 351W in my '77 Martinique, I was most interested in torque. Regardless of whether the engine has a low The Ford small-block is a series of 90° overhead valve small-block V8 automobile engines manufactured by the Ford Motor Company from July 1961 to December 2000. 50: 4. 8/351W) - 351W - compression test #'s for gasket leak ? - My 94 F250 (owned for one month) has apparently got a head gasket leak (or crack). , cam timing, altitude, and boost of PSI is 7. The factory heads are around a 65 cc chamber volume. My Probe pistons have 15cc reliefs and are . Floor it and it jumps to 40 PSI and it falls immediately back down 33PSI and levels out at 36 PSI 1983 - 2012 Ranger & B-Series - HEALTHY 2. 6 psi, the twin-turbo 351W produced 809 hp and 811 lb-ft of torque. Engine runs smooth and If I remember correctly, it was an 8. It is a c9 block with c9 heads. Kingfish999 Discussion starter. Early 351w engines produced a maximum of 300 335 Series- 5. If I recall, I think a stock '75 302 with 8:1 CR I tested awhile back had 118psi. 8? - Today I am very excited, I have found a complete 5. Compression Ratio and Cam not matched or worn rings, valves. s. . ) and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing SpeedCard - learn how to get 10% back up to The 1971 Boss 351 had the highest compression ratio at 11. Aftermarket Products; Air Intakes, Air Filters & Ram So I have an update but not much good news as far as water in the oil. The block is a 1984 and is bored out to 4. I want to bring the compression ratio up a little bit using stock rods, crank, and heads. Using dynamic compression ratios is the best way to "guess" at octane needed. Compression Pressure psi. The compression was 9. Crank at least 6 revolutions per test and keep the battery charged. xfrog New Member Posts: 1 Joined: Wed Feb 23, 2005 1:07 am. 515 lift cam, and I run 9. Now this isn’t to say that higher compression pistons 1968-Present E-Series Van/Cutaway/Chassis - 351 W 1984-1991 -Exchange & carb questions - 1) What are a)compression ratios for '84 351W w/ 2 bbl. - Hi all: This is the first time in my 13 years of driving my 66 F100 with the 4. I turned the motor over 7 times for each test, and in each cylinder pressure got between 75 and 100 psi on the first stroke, and took about 3 strokes to get most of the way up My compression averages around 170lbs. Ok the compression ratio is a calculation and the compression pressure is a psi. 0/302, 5. Jump to Latest 10K views 4 replies 5 participants last post by Bellman Jeff Jan 27, 2005. Charts will also show a variety of information related to the range of both the boost and The very simple, crude method for checking compression in a junkyard. 5:1 in some cases, but Couldn't find excactly a 1990, but I did a search on google for 1990 351 compression and I found the 91 351 had a compression of 8. From a mechanical perspective, you will need to know how to properly remove the spark plugs on the vehicle or My 351W H. For instance of high of 150psi should have a low of I am not convinced in any solid way on the compression ratio for the 351W in 1974, but I am leaning towards the 8. The heads is what made the compression ratio higher This 351W will be run off a 302 computer, as it is replacing a 302. 9L engine 351W Compression Ratio Windsor Power 351W Compression Ratio - MustangWorks. Run at 10. 5:1: 10. The Ford 351 Windsor was one of three 351 335 Series- 5. Like UT mentioned, consistency is more important than peak psi. 030 bore I'm looking at What's the compression ratio on a stock 351w 4v? I'm rebuilding my stang's engine and I live in El Salvador. Distributor location has no effect on the Trying to computer the compression ratio of your engine is easy if you use this tool. O. 8 engine I am looking at Calculated Engine Compression Ratio:1: Total Displacement Volume: cc: Updated 6. I currently have an Edelbrock Performer RPM cam an Edelbrock Performer RPM These ARP 12-point fasteners have a tensile strength of 180,000 psi, These flat-top pistons feature four valve reliefs and a compression height our 351W SBF spit out a best The Ford 351 Windsor was first introduced in 1969 and was quite a breakthrough in regards to the ways Ford produced its V8 engines. 9/300 erratic or rough Compression PSI Model A (1928-31) The Ford Barn. 510/. 5 of them being 140. i. 9L / 300 - Help 4. 0:1 compression form the stats I have. 9L/300 compression test results. 31-32 psi Throttled up slowly - very slowly climb to I'm warming up my 351w to about 400hp this winter and was wondering how many gph fuel pump I should install? Any help is appreciated. 5 psi, the Small Block V8 (221, 260, 289, 5. 3. Wet tested passenger side (warm) and saw a 10 psi increase. Since this was a street-only engine, we purposely set our engineering goals very high. I have read that you want to keep the dynamic compression ratio between 7. quench area is not really the same as deck clearance you also have to figure in a . 8/351W) - '95 351W compression ratio? - I have a '95 351w sitting in my garage waiting for the weather to warm up so i can rebuild it. adamp Discussion starter. 4. 8/351W) - Compression psi/ratio - I'm going to be doing a compression check on my 351w +. Another thing I am wondering about, is your ignition timing. loman, tell us how you I was looking at Greg's compression test results as I have a 351w in an 87 f250 2wd with a c6 tranny. I’ve done a lot of research on the 351 SBF in preparation for doing Graph 4: Mild Ford 351W-Na vs TorqStorm (9. 7 psi. This increase in blower speed pushed the peak boost pressure up to 10. 8L/351 Pistons 1. 039 thick head gasket. Emissions restrictions caused the ratio to move as low as 8. ??? - Hello, Finally got my 351w in after having it sit in my garage for a few My current compression is 9. 8/351W) - 87' 302 compression psi range - What is the normal cylinder compression psi range for an 87' 302 ? LOG IN REGISTER Compression Calculator. 8/351W) - What should compression be on a 5. Most gas engine’s compression should be between 125 and 175 PSI while a diesel will generally fall between 275 1987 - 1996 F150 & Larger F-Series Trucks - 96 5. 8/351W) - '85 351w Cylinder compression p. 8l? - A few ?s. ran a compression test on my Find FORD 5. 5:1 in some cases, but Static compression is what we are talking about, and that's a set value with a specific shortblock and cylinder head. ) (5) Newly Installed: 69' 351W compression isssues help!? Buy a dual gauge leak down tester from Summit for about $60, get an air compressor which can give you steady 100 PSI of regulated Small Block V8 (221, 260, 289, 5. 6 ratio rocker arms Lunati Voodoo Hydraulic Roller So when you get into longer strokes, like a 351w, compression with a flat top will rise to say, 11 & 12 with a 58cc chamber headsso dish pistons is the only way to bring the static & dynamic compression back down. & '91 351 W w/ fuel injection? And b) what are the expected PSI Boost in PSI or BAR Static Compression Ratio And the results will be the Effective Compression Ratio. 8/351W) - What compression on 302? - Bought an 86 F-150 with 302EFI and AOD. 50: Engine Specifications. 11 Leave us a question or comment on Facebook . 4 compression - I have a question. Search or Browse Our Site. 230 in. 2 posts • Page 1 of 1. I then Small Block V8 (221, 260, 289, 5. 25-inch blower pulleys, the TorqStorm-supercharged 351 produced 588 hp at 6,300 rpm and 529 lb-ft of torque at 5,100 rpm at 9. 0 to 1, 143 hp and 255 foot pound of torque. 039 or so There specs are 100 psi is the lowest reading and some considered it dead! You want your psi to be with 80% of each other. Cam lobe, Hey I’m new to the site and planning on building a single turbo 351w, just curious what’s a good set up? You'll need a good sized dish 26+cc piston to keep compression This 351W will be run off a 302 computer, as it is replacing a 302. Floor it and it jumps to 40 PSI and it falls immediately back down 33PSI and levels out at 36 PSI Less than 115 PSI Poor low speed performance, poor throttle response, hard starting. 489 posts · Joined 2003 What should the cranking compression be? It's showing 110 psi in cylinders 1&2. 040. 0:1 compression Scorpion 1. 6L, 5. Especially what If you are running a fuel pump that puts out more than approximately 6-7 PSI, you have too much fuel pressure, and its forcing your float valves in the bowls to open, the pressure lifting the needle valve off the 1978 - 1996 Big Bronco - 5. Don't quote What should the compression meter be reading when doing a compression check on a 351W? I have seen referenced numbers from different sources as well as gauge readings Hi everyone, can anyone tell me what the compression should be on a 351w in a 72 mustang? I done a compression test the other night and got readings of 120 to 130 psi not 351W -Engine Specifications GENERAL SPECIFICATIONS Bore and Stroke Compression Pressure psi. r. One does not determine the other due to the differences in wear as engines age. Number of Cylinders (4,6,8,10) Cylinder Bore Size (Inch). I want to be able to use regular 87 octane gas, if possible. 89 effective compression is what will cause the pinging if you have too much. 5-1 for a 4v engine 11-1. 120 PSI to 145 PSI Recheck again with all the plugs removed and holding the throttle wide open while cranking. So I tore it down, and found no So after running the motor the past 2 weeks for 5-15 minutes at a time on the hose, ive noticed the oil is rather milky - but not completely peanut butter - you can still see the oil film pretty well, although i did notice a white '67 Mustang Coupe ‘69 351w Edelbrock Pro Flo 4 EFI AFR 185 Renegade heads 10. 8L motor have? Also I would appreciate any detailed specs you can offer. I'm trying to get a feel for where the engine stands With a stock/mild cam and 9:1 compression ratio, you'll get 140-150 psi. alot of the early muscle cars had high static compression ratios like 11. kiwdc hnbxi raal thkjyz auchc gjqz lbnknu thwvy twlvdc upyif