fastgt

#1

i know this has been asked somewhere but i cant seem to find it....but does anyone know what the compression is supposed to be at for out motors.....and whats considered low and unsafe?

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2011 Spice Orange Mini Cooper2011 Alpine White BMW E92 M3gone but not forgotten2008 Space Grey BMW Z4 ///M2009 Black Honda Civic LX Coupe2006 Magnetic Black Nissan 350Z2007 Crimson Red BMW 335i Coupe

recneps

#2

im pretty sure its around 60 and anything more than 10 over or under that is bad.

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Former: 96 GT 5 speed(i/p/e)Fate-rear ended by mack truck00 GTS 6 speed(i/ Bored TB 63mm - 68.5mm w/ butterfly/ Ported IM/ IMG/ PFC/ Commander/ datalogit/ Ported & heat wrapped Header/ Decat/ UEGO/)193FWHP 14.2(1/4mi) @98mph, 2.12 60ft (just intake, unbolted Exhaust, and gutted)Fate-side swipped by 18 wheeler at 75mph.Next: maybe an elise

chucho

#3

i belive 9.5:1 is the compression, 8.5:1 is what you can buy for the low compression setups for turbos, if your talking pistons

This post has been edited by chucho: Sep 13, 2004 - 6:21 PM

recneps

#4

wait are you talking about the compression ratio or when your doing a compression test?

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Former: 96 GT 5 speed(i/p/e)Fate-rear ended by mack truck00 GTS 6 speed(i/ Bored TB 63mm - 68.5mm w/ butterfly/ Ported IM/ IMG/ PFC/ Commander/ datalogit/ Ported & heat wrapped Header/ Decat/ UEGO/)193FWHP 14.2(1/4mi) @98mph, 2.12 60ft (just intake, unbolted Exhaust, and gutted)Fate-side swipped by 18 wheeler at 75mph.Next: maybe an elise

fastgt

#5

my bad...i mean compression test....why is it bad if its over?

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2011 Spice Orange Mini Cooper2011 Alpine White BMW E92 M3gone but not forgotten2008 Space Grey BMW Z4 ///M2009 Black Honda Civic LX Coupe2006 Magnetic Black Nissan 350Z2007 Crimson Red BMW 335i Coupe

recneps

#6

i think i had the right idea i just worded it wrong. all pistons should be within 10 of each other. and i think they should still be around 60.

hopefully someone with a little more knowledge will jump in here.

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Former: 96 GT 5 speed(i/p/e)Fate-rear ended by mack truck00 GTS 6 speed(i/ Bored TB 63mm - 68.5mm w/ butterfly/ Ported IM/ IMG/ PFC/ Commander/ datalogit/ Ported & heat wrapped Header/ Decat/ UEGO/)193FWHP 14.2(1/4mi) @98mph, 2.12 60ft (just intake, unbolted Exhaust, and gutted)Fate-side swipped by 18 wheeler at 75mph.Next: maybe an elise

pxcr440

#7

i just tested mine the other day and it was 150 across the board

pxcr440

#8

its liek 25% from highest to lowest and should be after 4 or 5 cranks atleast

rjbibeau

#9

you can squirt like 2-3 drops of oil in there and the pressure will increase if you have good compression if you don't have good compression it won't increase

OOBE

#10

I'll chime in with my compression test, even though it's a 7A-FE but maybe someone will find it useful. It was 211, 210, 210, 210 before turbo, After turbo is 211, 210, 90, 210. >>

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Past -7A-FTE: Will never forget youPresent -3rd Gen3S-GTE: Swap in progressQUOTE (SinisterSinner @ Dec 19, 2009 - 10:52 AM)I dont want to even think of turbos, they blow up way too often...

rjbibeau

#11

90 ohh man that's way low

97sccelica

#12

-rjbibeau+Sep 13, 2004 - 7:37 PM

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1994 Celica GT4 WRC Edition@gt4.wrc on Instagram