944 heads on 16-valve 928s?
#31
Nordschleife Master
Join Date: Sep 2004
Location: Not close enough to VIR.
Posts: 9,429
Likes: 0
Received 2 Likes
on
2 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by DK
Measure the in/exh valve stem center-to-center distance on one chamber - for both 928 and 944 heads.
#32
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Formula94lt1
I take it S3 heads are the 85-86 32v heads, so I guess s4 and up blocks and heads are specific to their own? Are those more similar to the 968 heads?
#33
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
By Matt
I would like more info from Marc, I believe that there is a real problem running 944 heads on a 928, the reason is the valve spacing. If the valves are spaced differently you need a cam that has the same different spacing too. Well that is my opinion anyway. Maybe there is something I am missing? If Devek were running special cams that would explain it. Also I am using a 2.10" valve, how much bigger do you want to use?
Greg
IIRC, this was mentioned in one of Greg Gray's recent threads as being different. I think 944 valves are farther apart which allows bigger valves in big bore engines.
Greg
#34
Advanced
Join Date: May 2010
Location: France - Bordeaux
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
According to this, a 928 S4 head (3L 32V) can fit a 2.5L block ! if only we open the water hole on the side of the head ?