Thread: Port & Polish
View Single Post
Steve@Rennsport Steve@Rennsport is offline
Registered User
 
Join Date: Jul 2001
Location: Portland Oregon
Posts: 6,898
Mark:

FWIW,....We recently built a 3.0 race motor based on a set of STOCK early, large-port SC heads.

It had:

Stock valves
Stock ports (totally untouched)
Different valve springs & retainers
Webcam 171/149 cams
46mm PMO's on tall manifolds
JE pistons at 11:1 CR
Good 1 5/8" headers
Our own race muffler system
RSR-spec, twin-plug distributor
Careful assembly with some internal improvements

This thing made over 325 HP on our Superflow engine dyno.

The stock '78 SC heads were not a liability in this example,....

Caveat Emptor on people who claim to "improve" Porsche heads. Up to a point, certain ones work pretty well.
__________________
Steve Weiner
Rennsport Systems
Portland Oregon
(503) 244-0990
porsche@rennsportsystems.com
www.rennsportsystems.com
Old 11-10-2005, 09:10 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)