|
|
|
|
| Author |
|
|
Guest
Posts: n/a
|
Compression check
What are the acceptable cylinder compression numbers for 911's ??
|
||
08-31-2000, 06:24 PM
|
|
|
Guest
Posts: n/a
|
That would kind of depend on what your engine's compression ratio is ... they run from 8:1 to 9.8:1. What engine and compression ratio are you speaking of?
------------------ Warren Hall 1973 911S Targa |
||
|
08-31-2000, 06:43 PM
|
|
|
Guest
Posts: n/a
|
3.6 liter - 11:1 I believe.
|
||
|
08-31-2000, 07:03 PM
|
|
|
Guest
Posts: n/a
|
That is a pretty stout comp. ratio ... My best estimate is that you should expect an average of all six readings to be in the 180 to 225 psi range, and no individual values more than +/- 10% of the average.
------------------ Warren Hall 1973 911S Targa |
||
|
08-31-2000, 08:48 PM
|
|
|
Guest
Posts: n/a
|
When I tested my 3.6 last year at 71k miles the readings were between 178 and 185.
Robert Ellis 90 C4 |
||
|
09-01-2000, 03:41 PM
|
|
|
Guest
Posts: n/a
|
My readings are 195, 190, 195, 200, 210, 200
Hmm, not bad for 115,515 miles. Huh ?? |
||
|
09-01-2000, 05:50 PM
|
|
|
|
Guest
Posts: n/a
|
Not bad at all! A 198 psi mean value, and all readings within the 10% limit.
------------------ Warren Hall 1973 911S Targa |
||
|
09-01-2000, 06:26 PM
|
|
