924Board.org

Paul T. · Guest

Okay Guys, this is the scoop. The cylinder head on my car is bad, cracked oil gallies. Will a 924T or 931 head fit a 924 N/A engine? And will it work? Will my camshaft work on either of those heads? Let me know Gents because I am in the market for another cylinder head. Thanks!

Richard · Guest

The 931 head will not work because it has actual combustion chambers where as the NA head is flat. If you use the Turbo head you will loose compression. The cams will interchange, be sure to mark each follower as to it original position so it can go back to the same lobe on the cam.

Paul T. · Guest

Okay, scratch the 931 head idea. See the parts wanted discussion board, I'm shopping!

Richard · Guest

Forgot to mention; gate a late model head as a replacement. Try to get 1980 1/2 or newer. Your new head should have round exhaust ports. Bring it to an automotive machine shop to make sure it is flat. Late model heads have bigger valves for more power.

924RACR · Posted: Fri Apr 05, 2002 12:57 pm Post subject:

Actually, the 931 head will fit, if you change the pistons. Actually, it's preferable, flows much better, it's just a PITA since you must change the pistons. It's covered in the Tech Section.

_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Cbass · Guest

Vaughn, how much will the head drop the compression?

Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

I knew I'd worked it out a while back. Take a look at http://www.924board.org/viewtopic.php?topic=1880&forum=4
May the search be with you