i just did a compression test here are the results

1# 180
2# 165
3# 180
4# 178

i put a cap of oil in the low cylinder and it did not raise it i wanted to see if you guys would suggest me to get a valve job to bring that one cylinder up but if it was a valve job would it tap or not?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxvtecturbo &raquo;</TD></TR><TR><TD CLASS="quote">i just did a compression test here are the results

1# 180
2# 165
3# 180
4# 178

i put a cap of oil in the low cylinder and it did not raise it i wanted to see if you guys would suggest me to get a valve job to bring that one cylinder up but if it was a valve job would it tap or not?</TD></TR></TABLE>

A valve job may not help at all, because it could be that the rings on the pistons are worn. 180 for 9:1 CR motor is normal. The 165 on the number 2 cylender isnt TOO big a difference to lose sleep over. if it was like 100 then i would say you got a problem there.

 

overall your #'s are within spec for a 9:1 static compression motor. i just wonder if a capful of oil was a lil too much...(not like it would really hurt anything)

 

ttt

 

Numbers look alright to me.

 

My 9:1 compression motor had numbers of 180 all around...

If you can, you should do a leakdown test. That will be a better indicator of how your motor is doing.

 

That's pretty much the compression i have on my motor right now. I am boosted and have zero blow by and everything is fine. IMHO those numbers are just fine and i wouldn't worry about anything.

BTW the oil trick only works on blown rings and ringlands and i really don't think you have that.

 

Numbers look fine to me, have you done a leakdown on the motor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adseguy &raquo;</TD></TR><TR><TD CLASS="quote">That's pretty much the compression i have on my motor right now. I am boosted and have zero blow by and everything is fine. IMHO those numbers are just fine and i wouldn't worry about anything.

BTW the oil trick only works on blown rings and ringlands and i really don't think you have that. </TD></TR></TABLE>


so what do you think it is than valve job?

 

ttt

 

looks fine

 

will i lose anymore compression or will it affect my horsepower can i try that engine restore just to bring that one cylinder up



Modified by crxvtecturbo at 5:41 PM 4/14/2005

 

I wouldn't worry about it

 

my motor with 9:1 arias had 185-190 psi all across..i wouldnt worrie about it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96teggyls &raquo;</TD></TR><TR><TD CLASS="quote">my motor with 9:1 arias had 185-190 psi all across..i wouldnt worrie about it!</TD></TR></TABLE>

the key answer is yours is across and mine is like 180 in 3 cylinders and 165 in the fourth one

 

it's close enough though.

 

do you know if i can use that engine restore to bring that one cylinder up

 

is this a fresh rebuild?

 

no

 

Oh, I really wouldn't worry about it then. Just boost it.. hehe

 

will that cylinder take a beating and get any worse?

 

Should be fine

 

it'll be fine!!!! Dustin had to say this like 8 times! I've been boosting for 7 months hard now and I have lower overall numbers then you...that one cylinder just has a little more blow by.....it's nothing remotely severe

 

I only had to say it 5 times, quit exaggerating hehe

 

well i just want to make sure it is ok i am taking it back for tuning and dont want no problems with it