Compression Test
05-05-2003, 05:00 PM
#1
Nordschleife Master
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Compression Test
Where should the compression be on a healthy 944 Turbo engine (non S)?? If I remember correctly last year I got around 135-137psi across the board.
05-05-2003, 05:20 PM
#3
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The manual states 10 bar, or 145psi as a lower acceptable limit
...on a 16+ year old car, 145's across the board would be more of a perfect score than a lower acceptable number
...on a 16+ year old car, 145's across the board would be more of a perfect score than a lower acceptable number
05-05-2003, 09:07 PM
#6
Rennlist Junkie Forever
Here's something guaranteed to screw you up.
Do a compression test on a car with a big cam!
I almost died when I got 115psi across the board!
The I remembered the big cam!
Talk about a scare!
Do a compression test on a car with a big cam!
I almost died when I got 115psi across the board!
The I remembered the big cam!
Talk about a scare!
05-05-2003, 09:13 PM
#7
Done With Sidepatch
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I did mine last week on a rebuilt motor with about 900 miles on it...It was 130, 125, 130, 130...Not sure about my gauge...The thing runs flawlessly.
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05-06-2003, 04:25 AM
#8
Three Wheelin'
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my old motor had 151 152 135 150. a big "uh oh" light should have gone off in my mind... hmm, and guess which cyl. was the "problem" one not long thereafter?
06-22-2004, 08:32 PM
#9
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Just did mine on warm engine (but not a full operating temp) and not sure how accurate the guage is.
120, 129, 135, 128
A little low or just becasue not at full operating temp?
120, 129, 135, 128
A little low or just becasue not at full operating temp?
06-22-2004, 11:02 PM
#11
Race Director
Pull all the plugs and insert compression-gauge (pressure-gauge). Basically 0-200psi gauge with a hose hooked up to it with threads that matches the threads of the engine you're testing:
Snap-on Compression tester
Star Compression tester
S&G Tool Aid
Snap-on Compression tester
Star Compression tester
S&G Tool Aid
06-23-2004, 01:41 AM
#14
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I remember getting between 145~150 on all cylinders, the car wasn't fully warm, it was sitting for 30~45 mins after driving for a while. Which i guess is a good engine? 
but i need a leak tester though.
but i need a leak tester though.