H.F.B.

Here are my thoughts or suggestions.
The pictures below show my modifed cylinderhead, valve seats and valves. Simple hotrodders old school workmanship, proven and effective.
It doesn't cost much, it's just a fine tuning of the existing material.
1.) Valve seats with multi radius cut, blended with the rest of the port (+ top cut),
2.) Valves with radiused back cut (helps low lift flow)
3.) Widened valve seat ring
4.) Port matching
5.) MLS HEAD GASKET, C4272-030 (0.3 inch)

Additionally my car got a camshaft with more lift, NA-Tune, a extruded honed intake and a 4-1 header.

In 5th gear the car is running easily into the rev limiter (Euro Spec gearbox). So it seems, it was worth the effort.

Noahs944

DAAAAMMMMNNN Brother. You just made one of the most inspiring contributions to the "lowly" 8 valve NA world. Huge thanks... what a feast for the eyes.

Per vers

Good job on the head.

The "before" Picture shows, that there is alot to win. With a few hours Work.

Regards Per

Paulyy

There's a lot of worked 944 heads around. Just no one wants to spend the money on an N/A

I have a pretty heavily worked head on my block.


Stock head:






Worked head (3.2mm oversize intake valves and ported)






With the right cam for an N/A you should see a decent gain.

Noahs944

Oh thats so yummy! What size valve stem? 9mm still? Where'd you get the valves?

Paulyy

Don't worry about my valves, They're custom manly valves, and smaller valve stem.

Check this out. There's a thread on it on the turbo section. But this is better on the info all in 1 spot.

http://www.refresh951.com/HFHead.htm

V2Rocket

if anyone needs a head to work on, ive got a 951 head needing a rebuild for $100+ship

mattipuh

Good head work is never to waste, if you just dyno / adjust engine to get all out of it.