Compression Problem
Thread Starter
Junior Member
Joined: May 2007
Posts: 53
Likes: 0
From: Middle, GA, United States
Compression Problem
My Setup:
2000 Integra GS-R
B18C1
ITR P73 Pistons 10.6:1
ITR Valve Springs on Exhaust Side
Stock Dual Valve Springs on Intake
ITR 00-01 Camshafts
Otherwise stock bottom end
slightly milled head
My questions are: i did a compression test and my numbers were : 205(4) 185(3) 195(2) 200(1)
Why is my compression so low? I know this is not as important as consistent numbers across the board, but I think my lower numbers are due to my cam gear timing of -2/+2 for intake/exhaust. Maybe reversion through the intake side? Other than leakdown testing, are there any other methods of maybe detecting a bent valve? The motor only has about 15k on it. That 185 worries me.
2000 Integra GS-R
B18C1
ITR P73 Pistons 10.6:1
ITR Valve Springs on Exhaust Side
Stock Dual Valve Springs on Intake
ITR 00-01 Camshafts
Otherwise stock bottom end
slightly milled head
My questions are: i did a compression test and my numbers were : 205(4) 185(3) 195(2) 200(1)
Why is my compression so low? I know this is not as important as consistent numbers across the board, but I think my lower numbers are due to my cam gear timing of -2/+2 for intake/exhaust. Maybe reversion through the intake side? Other than leakdown testing, are there any other methods of maybe detecting a bent valve? The motor only has about 15k on it. That 185 worries me.
Honda-Tech Member
Joined: Oct 2005
Posts: 564
Likes: 1
From: You Wish,, Thieves
Re: Compression Problem (walker111)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by walker111 »</TD></TR><TR><TD CLASS="quote">The reason is the guage itself. Be more worried about the consistency then the high of the number.</TD></TR></TABLE>
Id be more worried about the numbers not being consistent. I've ran 205 across on one gauge to 225 on another, they dont really matter.
Id be more worried about the numbers not being consistent. I've ran 205 across on one gauge to 225 on another, they dont really matter.
Senior Member
Joined: Aug 2001
Posts: 18,261
Likes: 0
From: USA
Re: Compression Problem (justinsane)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by justinsane »</TD></TR><TR><TD CLASS="quote">bumpage
</TD></TR></TABLE>
</TD></TR></TABLE>
2.7(p/t)
Joined: Feb 2003
Posts: 2,357
Likes: 1
From: Maryland
Re: Compression Problem (Bbasso)
Compression tests are extremely over rated. Do a hot leak down, and your question will be answered in a manner that does not consist of people guessing online. 
BUT, if you want a really un reliable quick stupid test, you may do the following.
If you have a bent valve, it will show up on a valve lash check. The bent valve will consequently have more lash than a "good" cylinder. But again, this method sucks, and should not be used. Do a leak down and you'll know.
BUT, if you want a really un reliable quick stupid test, you may do the following.
If you have a bent valve, it will show up on a valve lash check. The bent valve will consequently have more lash than a "good" cylinder. But again, this method sucks, and should not be used. Do a leak down and you'll know.
Thread
Thread Starter
Forum
Replies
Last Post
crazydominicanman
All Motor / Naturally Aspirated
12
Sep 7, 2011 10:08 AM
Rocket
All Motor / Naturally Aspirated
119
Oct 1, 2010 06:08 AM