So….more header talk….this had me scratching my head
707 hp with MW Stage 6 heads that only flowed about 325 at 650 after Dwayne Porter worked them.Not complaining, just wondering if I should have done something else.
You mean on the cylinder head choice?
How many cubic inches is the engine?
Now, from what I was told & heard, there were multiple Stage VI castings. One version that was, “More Portable” than the base VI casting. IDK if that’s true or not.
What I do know is that MoPar was still using the stock architecture in trying to develop the head and hitting a wall in performance. The slight adjustment made in moving the rocker pushrod area over offered more of a ceiling. But it was still something of a stock replacement head in aluminum.
Chapman had the beauty of being able to have MoPar approach them for help. I’m sure they had more than just a couple of sets to cut up to learn just what can and can’t be done on porting.
Dwayne found 325 cfm? I’d call that smoking good.
The head is limited and his results are really good for sure. 707 hp? Yea buddy!
Here’s the flip. What else was available at the time at what cost?
