Header Size 396/375
 

Going to be building my headers for the new engine, would like to only have to do it once, what is the general consensus of an appropriate primary tube size for these animals?

Re: Header Size 396/375
 

Stahl by ACP, 1-7/8" to 2" step. You can spend more, but you won't find a better value.

Re: Header Size 396/375
 

What is the stall rpm or the rpm drop if it's a stick.

Re: Header Size 396/375
 

Elston headers, just wondering how many use them?

Re: Header Size 396/375
 

x2!!

Re: Header Size 396/375
 

PLEASE PLEASE PLEASE!!!! Search this forum right here. A while back, Calvin and I touched on this very subject. There is so much more than just the size. The step lengths,the angle of the tube off the top of the radius of the exhaust port, the radius of the tubes you use, the overall lengths, collector size and length. Merge angle and degree make a huge difference on these as well.

Do some homework, it will pay off better than you can imagine. To get the most out of this combination, dont use an old design....totally proven...

Chassis1

Re: Header Size 396/375
 

Re: Header Size 396/375
 

Call Performance Welding # 530-367-4124 Mark is the best header guy in the business.

Re: Header Size 396/375
 

I do he is fast and does good work first name calvin

Re: Header Size 396/375
 

x2

Re: Header Size 396/375
 

You might want to check out Larry Meaux's site at www.maxracesoftware.com/PIPE395.htm. Larry is a very nice guy and knows a LOT about Header Design. He offers a really cool Header Sizing software program. I used it to calculate tube sizes, collector size, etc. and mock up my design for a set of stainless steel Headers for my 70 Olds 442 Drag Car. The Headers were actually built for me by GP Headers. They did a great job.
Hope this helps.
Harold