header tubes smashed down

henrys57wagon · 01-17-2016, 11:43 PM

A couple of buddies were over the other night and talk got to headers and led to a video where they smashed all the tubes on a SB chev and on the dyno the before and after HP and torque were about the same. Another buddy said it was impossible so I'm putting it on here to see what you people think. Snakeoil or?

www.hotrod.com/news/1601-engine-masters-ep-4-bashes-headers-for-horsepowerso-you-dont-have-to/

Lee Valentine · 01-18-2016, 07:24 AM

It's true,Truppi Kling tried it year's ago same results.

GTX JOHN · 01-18-2016, 07:34 AM

Hooker has stated that since to 60's

Glenn Hayes · 01-18-2016, 06:17 PM

Now that was entertaining !

Randall Klein · 01-18-2016, 06:43 PM

Wow!
Sure would like to hear what one or more of the header gurus think

I'm running 20 yr old Jack Davis fenderwell headers and thought about looking into some custom stuff, but between AHFS and this video, I guess I'll stay with what I've got

danoone · 01-18-2016, 06:55 PM

I bought Headers By Ed literature 20 years ago. They explained the exhaust gases flow like water in in stream. The fastest flow is in the center. It is slower on the outside of a header tube because the cold air outside the tube slows the flow along the metal wall.

dmir55 · 01-18-2016, 09:09 PM

I think that headers for the most part are too large anyway. You mentioned Headers by ED. The size he would suggest for primary tubes and collectors most would think it was a joke. But I have done nothing more than put a set of collector extensions on and picked more than two tenths. We in fact set the national record in M/S awhile back with his collectors. I really really wish that he still made headers. Not only did they work very well, his pipes were a work of art. All he sells now are header kits. I have used a number of these kits and they work well. But anyone who has built a set of headers, especially equal length, know they are a real pain. But everyone should try it once or twice.

Glenn Hayes · 01-18-2016, 10:58 PM

Ed's Venturi Collectors have impressive results: http://www.headersbyed.com/hc_ventext.htm

Greg Reimer 7376 · 01-18-2016, 11:17 PM

Obviously, that header primary tube is quite on the large size. 15/8" headers work better than everybody thinks.

danoone · 01-19-2016, 09:12 AM

There literature changed the way I think about exhaust flow. Tube size is the start of scavenging. Heavy cars need small tubes. As mentioned above often times people put to big a header on

01-17-2016, 11:43 PM	#1
henrys57wagon Member Join Date: Jan 2009 Location: Carleton Place, On. Canada Posts: 107 Likes: 5 Liked 0 Times in 0 Posts	header tubes smashed down A couple of buddies were over the other night and talk got to headers and led to a video where they smashed all the tubes on a SB chev and on the dyno the before and after HP and torque were about the same. Another buddy said it was impossible so I'm putting it on here to see what you people think. Snakeoil or? www.hotrod.com/news/1601-engine-masters-ep-4-bashes-headers-for-horsepowerso-you-dont-have-to/ __________________ old 1608 stock racer

01-18-2016, 07:24 AM	#2
Lee Valentine Senior Member Join Date: May 2004 Location: Brookfield, CT Posts: 708 Likes: 13 Liked 319 Times in 68 Posts	Re: header tubes smashed down It's true,Truppi Kling tried it year's ago same results. __________________ Lee Valentine 1661 STK

01-18-2016, 07:34 AM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,709 Likes: 2,737 Liked 2,400 Times in 680 Posts	Re: header tubes smashed down Hooker has stated that since to 60's __________________ John Irving 741 Stock 741 Super Stock

01-18-2016, 06:17 PM	#4
Glenn Hayes Member Join Date: Feb 2009 Location: Weeki Wachee, Florida Posts: 348 Likes: 416 Liked 18 Times in 12 Posts	Re: header tubes smashed down Now that was entertaining ! __________________ "Real Race Cars Have Tailgates"

01-18-2016, 06:43 PM	#5
Randall Klein Senior Member Join Date: Dec 2002 Location: Lincoln, Nebraska Posts: 785 Likes: 45 Liked 316 Times in 67 Posts	Re: header tubes smashed down Wow! Sure would like to hear what one or more of the header gurus think I'm running 20 yr old Jack Davis fenderwell headers and thought about looking into some custom stuff, but between AHFS and this video, I guess I'll stay with what I've got

01-18-2016, 06:55 PM	#6
danoone Junior Member Join Date: Oct 2015 Posts: 66 Likes: 0 Liked 0 Times in 0 Posts	Re: header tubes smashed down I bought Headers By Ed literature 20 years ago. They explained the exhaust gases flow like water in in stream. The fastest flow is in the center. It is slower on the outside of a header tube because the cold air outside the tube slows the flow along the metal wall.

01-18-2016, 09:09 PM	#7
dmir55 Junior Member Join Date: Jul 2014 Location: northern Minnesota Posts: 64 Likes: 0 Liked 0 Times in 0 Posts	Re: header tubes smashed down I think that headers for the most part are too large anyway. You mentioned Headers by ED. The size he would suggest for primary tubes and collectors most would think it was a joke. But I have done nothing more than put a set of collector extensions on and picked more than two tenths. We in fact set the national record in M/S awhile back with his collectors. I really really wish that he still made headers. Not only did they work very well, his pipes were a work of art. All he sells now are header kits. I have used a number of these kits and they work well. But anyone who has built a set of headers, especially equal length, know they are a real pain. But everyone should try it once or twice.

01-18-2016, 10:58 PM	#8
Glenn Hayes Member Join Date: Feb 2009 Location: Weeki Wachee, Florida Posts: 348 Likes: 416 Liked 18 Times in 12 Posts	Re: header tubes smashed down Ed's Venturi Collectors have impressive results: http://www.headersbyed.com/hc_ventext.htm __________________ "Real Race Cars Have Tailgates"

01-18-2016, 11:17 PM	#9
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,130 Likes: 172 Liked 698 Times in 216 Posts	Re: header tubes smashed down Obviously, that header primary tube is quite on the large size. 15/8" headers work better than everybody thinks.

01-19-2016, 09:12 AM	#10
danoone Junior Member Join Date: Oct 2015 Posts: 66 Likes: 0 Liked 0 Times in 0 Posts	Re: header tubes smashed down There literature changed the way I think about exhaust flow. Tube size is the start of scavenging. Heavy cars need small tubes. As mentioned above often times people put to big a header on