Header Size 396/375

Chipper Chapman · 11-21-2016, 10:36 PM

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?

Alan Roehrich · 11-21-2016, 10:53 PM

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

dmir55 · 11-22-2016, 11:24 PM

Quote:

Originally Posted by Chipper Chapman

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?

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

monte385 · 11-23-2016, 03:58 PM

Elston headers, just wondering how many use them?

Ed Wright · 11-23-2016, 06:09 PM

Quote:

Originally Posted by alan roehrich

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

x2!!

chassis1 · 11-23-2016, 06:30 PM

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

chassis1 · 11-23-2016, 06:33 PM

http://classracer.com/classforum/sho...er+size&page=3

rod butcher · 11-24-2016, 09:12 AM

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

Mickey Whaley · 11-24-2016, 11:59 AM

Quote:

Originally Posted by monte385

Elston headers, just wondering how many use them?

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

moparpilot · 11-24-2016, 07:16 PM

Quote:

Originally Posted by rod butcher

Call Performance Welding 916-759-8926 Mark is the best header guy in the business.

x2

11-21-2016, 10:36 PM	#1
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 452 Likes: 211 Liked 141 Times in 63 Posts	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? __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090

11-21-2016, 10:53 PM	#2
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,913 Likes: 995 Liked 1,035 Times in 271 Posts	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. __________________ Alan Roehrich 212A G/S

11-23-2016, 03:58 PM	#4
monte385 Junior Member Join Date: Oct 2015 Posts: 51 Likes: 33 Liked 17 Times in 14 Posts	Re: Header Size 396/375 Elston headers, just wondering how many use them?

11-23-2016, 06:30 PM	#6
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 88 Likes: 0 Liked 3 Times in 1 Post	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

11-23-2016, 06:33 PM	#7
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 88 Likes: 0 Liked 3 Times in 1 Post	Re: Header Size 396/375 http://classracer.com/classforum/sho...er+size&page=3

11-24-2016, 09:12 AM	#8
rod butcher Member Join Date: Dec 2005 Posts: 248 Likes: 291 Liked 129 Times in 24 Posts	Re: Header Size 396/375 Call Performance Welding # 530-367-4124 Mark is the best header guy in the business. Last edited by rod butcher; 11-29-2016 at 04:56 PM.