Rennlist - Porsche Discussion Forums

Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

924 Engine

Thread Tools
 
Search this Thread
 
Old 03-12-2002, 08:55 PM
  #1  
Mal 89 944 Turbo
AutoX
Thread Starter
 
Mal 89 944 Turbo's Avatar
 
Join Date: Jun 2001
Location: Stratford CT
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Wink 924 Engine
Is the 2 liter engine on a 1980 924 an interference design like the 944? TIA Mal
Mal 89 944 Turbo is offline  
Reply Like
Old 03-12-2002, 09:20 PM
  #2  
Mike B
Done With Sidepatch
Rennlist Member
 
Mike B's Avatar
 
Join Date: May 2001
Location: Calgary
Posts: 3,846
Received 4 Likes on 4 Posts
Post
The N/A is not an interference design while the 924 turbo is...
Mike B is offline  
Reply Like
Old 03-12-2002, 11:02 PM
  #3  
Dennis Wilson
Drifting
 
Dennis Wilson's Avatar
 
Join Date: May 2001
Location: Owasso, OK
Posts: 2,747
Likes: 0
Received 3 Likes on 3 Posts
Post
Think they (NA and Turbo) are both noninterference engines. The Turbo has a 7.5 to 1 compression ratio which allows even more valve clearance than the NA (9 to 1 ratio). I have broken at least 4 belts on my 80 NA and never harmed a valve.

Dennis
Dennis Wilson is offline  
Reply Like
Old 03-13-2002, 12:38 AM
  #4  
Tabor
Drifting
 
Tabor's Avatar
 
Join Date: May 2001
Location: Portland, OR
Posts: 2,779
Likes: 0
Received 0 Likes on 0 Posts
Post
I have been told that the 931 is an interferance design.
Tabor is offline  
Reply Like
Old 03-13-2002, 07:30 AM
  #5  
CBass
Racer
 
CBass's Avatar
 
Join Date: Mar 2002
Location: Vancouver, Canada
Posts: 257
Likes: 0
Received 0 Likes on 0 Posts
Post
It's not supposed to be, but my brother owns one, and he's not quite sure. My 924 NA has 11:1 compression. Crazy, huh?
CBass is offline  
Reply Like
Old 03-13-2002, 09:33 AM
  #6  
hrk
Instructor
 
hrk's Avatar
 
Join Date: Nov 2001
Location: Atlanta GA
Posts: 224
Likes: 0
Received 0 Likes on 0 Posts
Post
Mike B is right. 924 is non interference and 931 is interference.

hrk
hrk is offline  
Reply Like
Back to Subforum
924/931/944/951/968 Forum
View Next Unread
brakes




Advanced Search
Quick Reply: 924 Engine


Reply Closed Thread Share
Forum Jump

All times are GMT -3. The time now is 07:53 PM.