Acceptable Compression Test Results? - S2KI Honda S2000 Forums



Acceptable Compression Test Results?

Reply
 
 
 
LinkBack Thread Tools
Old 01-15-2011, 12:03 PM   #1
Registered User
Thread Starter
 
Join Date: Oct 2008
Posts: 664
Thanks: 0
Thanked 1 Time in 1 Post
Default Acceptable Compression Test Results?

I just got a compression test at REN Motorsports in San Mateo:
2002 AP1 w/ 50k miles (test-driving today)... 15 ft above sea level.

#1: 175
#2: 150
#3: 175
#4: 165

Are those good? Bad?? I'm worried they aren't close to the 240s? But they look consistent.

What do you think?

Thanks!
HarryD is online now   Reply With Quote
Old 01-15-2011, 12:17 PM   #2
Moderator
 
RedCelica's Avatar
 
Join Date: Apr 2002
Location: Raleigh
Posts: 14,222
Thanked 4 Times in 4 Posts
Default

yeah they look a bit low...a brand new motor might get 240s...most AP1s I've seen though are at least 200+
RedCelica is offline   Reply With Quote
Old 01-15-2011, 01:01 PM   #3
Registered User
 
Join Date: Oct 2010
Posts: 1,846
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by RedCelica,Jan 15 2011, 12:17 PM
yeah they look a bit low...a brand new motor might get 240s...most AP1s I've seen though are at least 200+
first time i saw a ap1 under 200's too....
i wouldnt buy it lol

the guy who owns it probley knows this too and wants to get rid of it
s2cho is offline   Reply With Quote
Old 01-15-2011, 01:19 PM   #4
Registered User
 
Join Date: Dec 2009
Location: SoCal
Posts: 2,665
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Don't buy it. Anything under 200 = bad
Disgustipated is offline   Reply With Quote
Old 01-15-2011, 02:18 PM   #5
Registered User
Thread Starter
 
Join Date: Oct 2008
Posts: 664
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Disgustipated,Jan 15 2011, 01:19 PM
Don't buy it. Anything under 200 = bad
Will do. I knew off the top of my head the range was above 200,
but the mechanic there said it looked OK since it was consistent,
and my Honda dealer mechanic said the same thing--not to worry about it.

Now I'm worrying about it and will probably walk away I guess.
HarryD is online now   Reply With Quote
Old 01-15-2011, 02:27 PM   #6
Registered User
 
Join Date: Oct 2010
Posts: 1,846
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by HarryD,Jan 15 2011, 02:18 PM
Will do. I knew off the top of my head the range was above 200,
but the mechanic there said it looked OK since it was consistent,
and my Honda dealer mechanic said the same thing--not to worry about it.

Now I'm worrying about it and will probably walk away I guess.
you know how there are some factory beasts that come with actually like 220-230 to the wheel?
maybe this is a factory whimp that comes with like 160 or 170hp haha xD

but compression test dosent mean hp but it does mean healthy engine lol
s2cho is offline   Reply With Quote
Old 01-15-2011, 02:31 PM   #7
Sponsor
 
Moddiction's Avatar
 
Join Date: Oct 2007
Location: Mooresville, NC
Posts: 27,699
Thanks: 0
Thanked 2 Times in 2 Posts
Default

It can read low depending on the gauge or if done when cold and not WOT.
Having said that there should not be 25 psi difference between cylinders. That is the biggest thing to look for when doing a compression and leakdown test.
Cylinder 2 is very low there. Don't buy that car unless it is super cheap and have intentions of putting new engine in there possibly.
Moddiction is offline   Reply With Quote
Old 01-15-2011, 03:53 PM   #8
Registered User
 
Join Date: May 2010
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I plan on buying a s2k first week in feb, i plan on having the dealer do.a compression test before i buy. I wanted to know doesnt elevation effect the results too?
IlluminatiDre is offline   Reply With Quote
Old 01-15-2011, 05:05 PM   #9
Registered User
 
Join Date: May 2010
Location: Annapolis, MD
Posts: 334
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Constancy is key when doing a compression test.

However those numbers do sound low though. 170ish seems to be the number that most 3mm head gaskets give you.

Looks number 2 might be potentially hurt.
J-GO is offline   Reply With Quote
Old 01-15-2011, 06:24 PM   #10
MTZ
Registered User
 
Join Date: Sep 2010
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Default

dont forget elevation
MTZ is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Compression numbers for F22C Fabulous_omelet S2000 Under The Hood 10 11-20-2016 02:31 PM
FS: F20 c2 Mike's UK & Ireland For Sale and Wanted 5 11-14-2016 08:49 AM
The Cooling Fiasco kr2k S2000 Under The Hood 4 11-12-2016 09:02 AM
Low compression in my s2k Jesman-built S2000 Under The Hood 15 10-30-2016 03:34 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 11:42 AM.