Interpretation of Compression Test Results
05-17-2018, 05:17 PM
#1
Three Wheelin'
Thread Starter
Interpretation of Compression Test Results
Looking at a 993 and it had the following compression test results. Can anyone explain/interpret the numbers for me?
Compression test:
1-152
2-156
3-155
4-157
5-160
6-155
Compression test:
1-152
2-156
3-155
4-157
5-160
6-155
05-17-2018, 05:24 PM
#2
Rennlist Member
Those numbers are PSI .
Each cylinder is measure under cranking speed.
They look acceptable all within small variance.
BTW
The better tis would a leak down did they give you that ?
Elliot
Each cylinder is measure under cranking speed.
They look acceptable all within small variance.
BTW
The better tis would a leak down did they give you that ?
Elliot
05-17-2018, 05:30 PM
#3
Three Wheelin'
Thread Starter
Thank you Elliot. No they only performed a compression test when the plugs were changed. What are spec compression numbers? I’ve seen posts with 200 and greater, so is this just relative compression to the other cylinders under the same conditions?