Helmwurst

Directed towards for D. Moore, but anyone else chime in with feedback. Carburated 502 Mags low hours. Looking at new exhaust first. In the D.Moore book you point to a couple of different cast exhaust designs. One shows a smaller divider than the other, I am assuming one should not use the one with the smaller divider. Who made that? or should I say, I am looking at Gill, Imco and Eddie. Are these all basically the same or is one significantly better. Also thinking about using the 525SC cam with some headwork. Ever used this combo and if so, what kind of results could someone expect.

Dennis Moore

The photo that you are asking about is of a popular exhaust manifold. I took the photo at a boat show display. I was threatened with a law suit for what I said about the manifold even though I didn't mention the name of the manifold in the book. All I can say is that reading the book should answer your questions.

I feel that there are many different camshafts that would be better than the 525 SC cam. In case you don't know it the camshaft is a Crane #132561. It has 228/236 duration and .530/.551 lift with a LSA of 114 degrees. It seems to work well with a supercharger.

Installing a slightly smaller camshaft (224/230 with a 110 LSA) would make a much more powerfull engine for a naturally aspirated engine.

Helmwurst

Thanks...

Griff

Helm, I used Crane cam #132241 in my 454mag/365hp. Its a flat tappet similar to the 525sc cam(but 1/2 the price) 226/236 with .534/.553 lift and on a 112 lobe separation.
Gave the cam specs to someone else on the board("no budget") and with a stock 454 bottom, heads milled .030, roller rockers, and holley carb, it dynoed at 425hp. About a 60 hp increase.