2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

I checked my compression today...

Old Apr 29, 2003 | 12:05 AM
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Question I checked my compression today...

110 PSI front rotor
109 PSI rear rotor

Are these numbers OK for a s5 turbo block?
What's spec? I have NO idea.


Also, the person on the inside of the car forgot to hold the throttle at WOT, would that throw things off?
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Old Apr 29, 2003 | 12:07 AM
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120 is new from stock. Make sure the engine was warmed up properly before hand. and the throttle has to be at WOT.
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Old Apr 29, 2003 | 01:50 AM
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The test will only be totally accurate if perofrmed on a warmed up engine, and with the throttle at WOT.

New spec is about 120-125.
VGC is 110-120
Good is 100-110
Getting weak is 90-100
Poor condition is under 90.
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Old Apr 29, 2003 | 02:08 AM
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at 1 mile high subtract about 20 psi from all of those numbers.
Damn, I wish I lived at sea level

Last edited by rotary>piston; Apr 29, 2003 at 02:11 AM.
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Old Apr 29, 2003 | 10:49 AM
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so my engine is fine then? Good.

What's up with the dubs on the pickup? Please tell me you didn't spend money on those.
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Old Apr 29, 2003 | 11:57 AM
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What's up with the dubs on the pickup?
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Old Apr 29, 2003 | 02:03 PM
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dont mess with him about those rims... he loves em. Kevin is a pro blinger...
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Old Apr 29, 2003 | 02:15 PM
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Don't forget that the compression difference between the two rotors (and also between faces??) has a spec.
Cold medicine has me all messed up and I can't rmember what the allowable difference is...
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Old Apr 29, 2003 | 04:10 PM
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I think it's 21 psi, or something
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Old Apr 29, 2003 | 06:04 PM
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Originally posted by Terrh
What's up with the dubs on the pickup? Please tell me you didn't spend money on those.
I wondered too. I mean, I could see if it was lowered, and 2WD, but with the 4WD off-road package?
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