Heads...
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Besides the 75+ lbs. weight savings (alone worth the difference), the aluminum heads can usually be repaired in the event of a disaster, unlike iron, and allow higher compression ratios. If cost is a factor, that is the downside.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
All I can say is.....switching directly from Iron 993? cast heads that had been smoothed over, but still had 194/15x valves, to a set of 113 L98 alumium heads made a large improvement in performance....same valves, with no port work at all, they were declared close enough by me...
I think the increased compression on the heads goes well with the TPIS ZZ9 cam in there for a long time now....
I think the increased compression on the heads goes well with the TPIS ZZ9 cam in there for a long time now....
