i want to know is 180-190 for a 94 gsr with 125k miles good or bad? and i have a friend said he has 220 when he did his test on his 94 ls with 200000 miles. thanks


Modified by lv6l at 1:31 PM 3/26/2005

 

I've seen this a couple times but can't remember what they are supposed to be. Try running a search in the integra forum for compression numbers or checks.

 

new for LS is 200, so 220 is WOAH. new for GS-R is 300, and your numbers are on the low side of acceptable. 140 minimum, but the really important part is the variance between cylinders. the highest and lowest can't be more than 28psi off, according to honda. but really, if they're more than 12psi or so off, your engine may be a turd.

 

According to the Helms service manual, for a GSR, the nominal is 213 psi, minimum is 135 psi, and maximum variance is 28psi.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95lstegman &raquo;</TD></TR><TR><TD CLASS="quote">new for GS-R is 300</TD></TR></TABLE>

i dont know about 300, but 220 is about right.

btw, did you do this at WOT? some people wont, and the numbers will come out low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by virusiidx &raquo;</TD></TR><TR><TD CLASS="quote">i dont know about 300, but 220 is about right.

btw, did you do this at WOT? some people wont, and the numbers will come out low.</TD></TR></TABLE>

Actually the majority of cars ive seen were around 240 for gsrs. How do you manage to do WOT. You just crank your motor over a few times

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deluzional &raquo;</TD></TR><TR><TD CLASS="quote">Actually the majority of cars ive seen were around 240 for gsrs. How do you manage to do WOT. You just crank your motor over a few times</TD></TR></TABLE>

yeah 240 too, WOT = wide open throttle, just make sure you have the accel. pedal pushed down all the way when cranking about 5 turns.

 

oh i didn't do it with the wide open throttle. by the way would it make any difference if the engine is warm up, hot , or cold?

 

mine was 240 all the way across for my 94 gsr, which according to the haynes manual is good. i dunno though, cuz it sounds like people are saying that some manuals have diff specs in them. does anyone know what a honda manual actually says it should be?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sabotage7 &raquo;</TD></TR><TR><TD CLASS="quote">mine was 240 all the way across for my 94 gsr, which according to the haynes manual is good. i dunno though, cuz it sounds like people are saying that some manuals have diff specs in them. does anyone know what a honda manual actually says it should be?</TD></TR></TABLE>

some one already said it earlier "Helms" is the Honda manual

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by opiumdaze &raquo;</TD></TR><TR><TD CLASS="quote">

some one already said it earlier "Helms" is the Honda manual </TD></TR></TABLE>

i'm talking about from an actual honda/acura service manual, the dealer one. helms is a brand, like chiltons and haynes, they all make manuals for all types of vehicles.

 

nevermind, i found my factory service manual

my factory manual says:
nominal=270
minimum=140
max variation= 28

my haynes manual says:
nominal=270
minimum=135
max variation= 28

and according to 01BLKGSR, helms says:
nominal=213
minimum=135
max variation= 28

see, thats what i was talking about. the varience in #s btw different manuals!
i think i'll stick with the specs in the factory manual!

 

My LS was 225psi all across, so I'd think the GSR should be higher than that.

 

does it matter if the engine is warm up or not??

 

Yes it should be at operating temperature, full throttle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sabotage7 &raquo;</TD></TR><TR><TD CLASS="quote">nevermind, i found my factory service manual

my factory manual says:
nominal=270
minimum=140
max variation= 28

my haynes manual says:
nominal=270
minimum=135
max variation= 28

and according to 01BLKGSR, helms says:
nominal=213
minimum=135
max variation= 28

see, thats what i was talking about. the varience in #s btw different manuals!
i think i'll stick with the specs in the factory manual!
</TD></TR></TABLE>

WTF, why is mine so low

 

what does the variation mean and how does it work?

 

the variance is the difference between the compression in the 4 cylinders. All of them should be within 28psi of each other.