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Thread: compression test numbers

  1. #11
    Better than that "other" place Not Verified
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    Consistency is the key with a compression test... not actual numbers. Yours are consistent, and unlike many cars, we actually have a spec in the manual. Many cars don't have a compression spec, they just need to be within 10% of each other.

    Here's the other thing, you need to do the test with consistent cranks as well. For instance, you can't do one cylinder for 3 cranks and then do another with 10 cranks. Sure, it may take a lot of cranks to reach max compression, but they key is consistency. You need a strong battery for every crank, the same number of cranks, the same temperature, etc etc.

    Vacuum reduction, Powdercoated misc, cruise relocate, Evo9 BOV, Custom catch cans, Russell fuel filter, SS braided fuel lines, High flow fuel loop, Autogage fuel gauge, Catless DP, DNP Y-pipe, Fuel pump hotwire.

  2. #12
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    I did 5 cranks on each cylinder, same temp, and.battery was fully.charged before I started. I'm just happy I don't need a lower.end.rebuild lol

    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)
    Sold.
    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.
    Wife's ride: 2014 Hyundai Sonata 2.0T Wifeboosties, go!
    Family-mobile: 2016 Dodge Grand Caravan. Dogs love minivans!

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