Well I checked my compression today and I got: around 212-115 across the board. My car is a '97 model with a little over 80k miles. Does those numbers sound a little high to you? I got a compression tester from advance auto and did the procedure listed on here. Or are those numbers normal?

FYI: I plan on boosting stock internals

EDIT: I meant 212-215

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97 Talon-SOLD
95 GS-T-SOLD
08 F-150

115 is way too low compared to the higher number.

Read the edit^^^^^

Sorry about that

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97 Talon-SOLD
95 GS-T-SOLD
08 F-150

212-215 is right where you want to be. Those are great numbers, you should be fine running 5-7 psi.




Oh, you don't like altezza's? Too bad, your gonna get a good look at mine.

Those compression numbers are great. Boost it!

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

yeah. didn't see the edit. those look fine.

Someone told me that the max compression on a stock 420a is 185. Is this true...someone please clear this up for me. I also heard that when checking your compression, you should hold your foot on the gas. when I did it, I pumped on the gas. Should I test again?

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97 Talon-SOLD
95 GS-T-SOLD
08 F-150

You're fine. Those numbers are towards the high end of the spec, which is 175 - 225psi hot.

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If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.

'95 Eclipse TurboGS (garage deco)
'95 TSi AWD (restoring a survivor)
'97 Talon ESi-T (poor impulse control)
'99 Eclipse RS-T (daily beater)
'13 Evo X (mostly stock)
'17 Sienna (Middle Aged Dad Mobile)



Factory Service Manuals: http://nawdu.de/files/

Yeah those are great numbers. Chicks should be all over you.

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HAD: '98 Eclipse RS

HAVE: '04 Grand Prix GTP Comp G

175 up to 225 is perfect. You should be worried when it starts getting low. Higher compression is usually from carbon build up. Nothing to be worried about.