Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   Compression check (http://forums.pelicanparts.com/porsche-911-technical-forum/31563-compression-check.html)

madster1 08-31-2000 06:24 PM
Compression check
 
What are the acceptable cylinder compression numbers for 911's ??

Early_S_Man 08-31-2000 06:43 PM
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

madster1 08-31-2000 07:03 PM
3.6 liter - 11:1 I believe.

Early_S_Man 08-31-2000 08:48 PM
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

robert ellis 09-01-2000 03:41 PM
When I tested my 3.6 last year at 71k miles the readings were between 178 and 185.

Robert Ellis
90 C4

madster1 09-01-2000 05:50 PM
My readings are 195, 190, 195, 200, 210, 200

Hmm, not bad for 115,515 miles. Huh ??

Early_S_Man 09-01-2000 06:26 PM
Not bad at all! A 198 psi mean value, and all readings within the 10% limit.

------------------
Warren Hall
1973 911S Targa


All times are GMT -8. The time now is 06:52 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.