Why no D-port headers?
Thread Starter
Drifting
Joined: Apr 2000
Posts: 1,390
Likes: 36
From: INDIANA
Why no D-port headers?
Since C5 headers have left the price range of Hooker and Hedman and moved up to the exotic $800-$1600 range, why do none I've seen come with D-port flanges, which in my opinion should perform better since they would match the port? Is there a technical reason?
Safety Car
Joined: Aug 1999
Posts: 4,353
Likes: 252
From: Minnesota
Re: Why no D-port headers? (LT1GMC)
I've been told by two different header designers of C5 headers that port matching is not important and may, if fact, be counterproductive to max. exhaust gas scaveging.
Le Mans Master
Joined: Jul 2000
Posts: 7,758
Likes: 0
From: Fort Worth Texas
Cruise-In II Veteran
Cruise-In III Veteran
Re: Why no D-port headers? (LT1GMC)
Its actually a good thing to have a little larger pipe at the connect point to the head port. With a d-port head you get that using a round pipe. This helps cacel out high energy reflection waves from going into the chamber.
