Compression problem?

96Saleen · 10-21-2001, 09:22 PM

Hey Guys,

My '96 Saleen is having HP trouble. I went to the track today and the best the car did was 14.6 @ 102 (w/nitrous and 15.18 @ 93mph (w/o nitrous).

My question is regarding the compression. A few weeks ago, my dad and I ran a compression test and the results are the following:

Spark Plug 1: 90 / 120
Spark Plug 2: 90 / 120
Spark Plug 3: 80 / 115
" " 4: 100/ 130
Plug 5: 90/ 120
Plug 6: 90/ 120
Plug 7: 90/ 120
Plug 8: 90 / 120

Now, i'm not the mechanic in the family but I think the 2nd one is cranking but hell if I know..
My dad says those #s are fine but my brother and his engineering buddies say that the #s are very low. They say that a stock GT have a compression of 150+. Please, let me know if something is wrong with my 'baby' and what I can do about it. Are new heads in my future?

Thanks,
Mike

------------------
1996 Saleen S281 #1
- Bassini X-pipe
- MAC underdrive pulleys
- MAC Mass Cold Air

Best ET: 14.7sec
Best MPH: 97mph

Hammer · 10-22-2001, 01:14 PM

I don't know much about compression, but if this is a non-supercharged Saleen, those track #s are about right....

Just to let you know, with a trap speed of 102, you can probably cut an even 14 or even high 13s with a decent launch on street tires...

Watch that traction!!!

------------------
Adam "Hammer" Packett:
Moderator, Gulf War Veteran

GO GET 'EM BOYS!

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10-21-2001, 09:22 PM	#1
96Saleen Registered Member Join Date: Aug 2001 Location: Mt. Clemens, MI, USA Posts: 19	Compression problem? Hey Guys, My '96 Saleen is having HP trouble. I went to the track today and the best the car did was 14.6 @ 102 (w/nitrous and 15.18 @ 93mph (w/o nitrous). My question is regarding the compression. A few weeks ago, my dad and I ran a compression test and the results are the following: Spark Plug 1: 90 / 120 Spark Plug 2: 90 / 120 Spark Plug 3: 80 / 115 " " 4: 100/ 130 Plug 5: 90/ 120 Plug 6: 90/ 120 Plug 7: 90/ 120 Plug 8: 90 / 120 Now, i'm not the mechanic in the family but I think the 2nd one is cranking but hell if I know.. My dad says those #s are fine but my brother and his engineering buddies say that the #s are very low. They say that a stock GT have a compression of 150+. Please, let me know if something is wrong with my 'baby' and what I can do about it. Are new heads in my future? Thanks, Mike ------------------ 1996 Saleen S281 #1 - Bassini X-pipe - MAC underdrive pulleys - MAC Mass Cold Air Best ET: 14.7sec Best MPH: 97mph

10-22-2001, 01:14 PM	#2
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	I don't know much about compression, but if this is a non-supercharged Saleen, those track #s are about right.... Just to let you know, with a trap speed of 102, you can probably cut an even 14 or even high 13s with a decent launch on street tires... Watch that traction!!! ------------------ Adam "Hammer" Packett: Moderator, Gulf War Veteran GO GET 'EM BOYS!