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Thread: compression test numbers

  1. #1
    Forum User Feedback Score 0 FluffyCow's Avatar
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    compression test numbers

    Compression test

    95 ouside engine cold

    1 - 140
    3 - 140
    5 - 145
    2 - 140
    4 - between 135 and 140(137.5? Lol)
    6 - same as 4

    Is this good?

    1991 Dodge Stealth ES
    - Sold
    1991 Fiji/Mystic Blue R/T TT 1 of 235(paint/R/T TT only, can't find more info, VIN is a 1 of none number)
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    1992 silver VR-4 - 1 of 152 identical
    Show: 99 Sails, 99 rear garnish, 2nd-gen steering wheel, Pioneer Premier h/u, aftermarket speakers(Alpine type s's I think), 10 inch JL W1 sub in spnallb corner box.
    Go: 15G Turbos, FMIC, ATR DP, ACT clutch, 3-inch turbo back to dual apexi N1 mufflers, no cats, HKS SSQV3 BOV(black), PWR rad, Ksport coilovers, 3sx rear adj. control arms, ChromedECU, ECU Boost control, rebuilt TB, Cianci gauge pod w/ Defi D-series(Boost, EGT, oil pres), 93 shifter.
    Soon: 550cc injectors, ChromeTune, boosties!

    1987 Dodge Ramcharger - The back-up plan/winter beater. Mods: Non-computerized timing, custom white gauge faces and red LED illumination, cat-back straight pipe, Chevy seats, Ford running boards, and MOPAR everything else.
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  2. #2
    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    Yeah it's not bad. Engine being cold it's hard to get an accurate reading but what you really want to look at is certain ones being off from the others. Yours are pretty close so I would say your compression is fine.

    Quote Originally Posted by HilbillyHomeboy View Post
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    Forum User Feedback Score 0 FluffyCow's Avatar
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    I guess once I get my.front turbo rebuilt and it all put back together.I'll do it again but warm..

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    Advanced Tech? verified Feedback Score 0 i3igpete's Avatar
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    I get around ~130 on cold engine, but i'm not sure if the car not being run for a week beforehand makes a big difference (piston rings probably dry). also have cams so that might make a tiny difference
    Last edited by i3igpete; 07-22-2011 at 11:59 PM.
    Maddog Performance Engineering

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    The Panda Not Verified Feedback Score 0 vr4tune's Avatar
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    Quote Originally Posted by i3igpete View Post
    I get around ~130 on cold engine, but i'm not sure if the car not being run for a week beforehand makes a big difference (piston rings probably dry). also have cams so that might make a tiny difference

    Forged pistons might make a difference when cold. They expand more than cast do.

    Ported heads, IPS 2mm oversized valves, Delta 264/272 cams, 3SX High rev valve springs, 3SX cam gears,
    Merkel 6g72 3.5L BILLET crank stroker (going in this summer), 3sx poly motor mounts
    IPS EvoIII turbo kit, HKS SSQV bov, ETS anodized FMIC, AEM intake filters, Tanabe Turbo Back Concept G Blue Exhaust,
    HKS DLI, Ultra spark plug wires, Denso iridium IK24 spark plugs,
    JSPEC trans, Ultimate Performance short throw shifter, Spec carbon twin disk clutch, PST aluminum 2 piece drive shaft,
    Denso Supra fuel pump, RC 750cc fuel injectors, AEM Fuel pressure regulator,
    AEM wideband & boost gauge, AEM EMS in speed density,
    Addco sway bars, DBA 4000 drilled & slotted rotors, Enkei PF01 18x9 +45, BFGoodrich g-froce KDW 245/40/R18

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    Forum User Feedback Score 0 vr4gto's Avatar
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    I still get an average 140 with 219k on my engine.

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    Forum User Feedback Score 0 FluffyCow's Avatar
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    I haven't run her in weeks.. and its stock internals. Looks like my oil was only front turbo bad heh...

  8. #8
    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    My engine is about 150-160 with Wiseco pistons.

  9. #9
    Forum User Not Verified Feedback Score 3 (100%) Sin'sVr4's Avatar
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    mine is 125-130 on all forged internals. came like that form laniers speed shop. he bored it a bit larger than .060 to handle taking a beating. he builds 7 sec drag cars btw

    1/4 mile 11.80 @117mph. 551whp 641trq @ 26psi E85 tune, MTC 19T-HLs, forge 15psi spring wastegates, 780 PTE inj, 3SX Fuel loop, ss fuel lines, Engine built by Laniers Speed shop, block bored .060 w/ chromolly rings, weisco pistons, 3sx custom forged rods, forged crank, HKS DLI, AEM EMS, AEM UEGO wideband, prosport oil and boost guages, aeromotive 1000 FPR, Dejon blow thru twintakes, Walbro E85 400 w/ 3sx hotwire kit and custom an fitting fuel pump w/ STM filter to pump line, CXRacing FMIC, Megan Racing Aluminum radiator, IPS custom downpipe, Borla 3" exhaust,Greddy profec b spec II EBC, Blitz SS BOV,R1 Drilled slotted rotors, Drag DR-31 rims, RPS stage 4 unsprung clutch,

  10. #10
    VR-3747 :D Not Verified Feedback Score 1 (100%) futurevr4man's Avatar
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    mine was 150ish. but its more about the % difference between cylinders. your engine is fine
    rise and rise again until lambs become lions

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