header tube size - Page 3

MEXJOE · 11-21-2011, 06:34 PM

BOY! You said it !
I've got a bunch of expensive stuff I'm gonna make into wind chimes and try to sell on E-BAY.
"Tune around what you have" is the best advice I ever got.
KISS method.........

Quote:

Originally Posted by Wade_Owens

Lol, I've wasted enough money on headers and hardly ever see a gain. Use the KISS method.........

Wade O

chassis1 · 11-21-2011, 08:07 PM

everyone seems to forget that the cam is still the brain of this deal when it comes to headers. most of the time, off the shelf STOCKER cams are still very old designs and are not made to be as efficient as some headers are built or bought, no matter what your engine guys chooses.....truth is most engine guys miss on the cam and go to what they call, " ol' reliable cams...." but yet the racer seems to think better than the engine builder sometimes...and looks at his WHOLE combination......

Chassis1

K Stubbs · 11-22-2011, 12:44 AM

I know a racer that ran a 69 Camaro 350/255 auto stocker. He had a set of Kromer (sp?) step headers that were 1/12 - 1/58 - 13/4. He blew out a tube at a race and put on a straight 13/4 on that side and did not affect performance one bit. He ran it like this for a couple of years and won class many times including Indy. Like Wade said, unless you are way out in left field there is probably not a big performance difference in them.

Charlie Yannetti · 11-22-2011, 10:24 AM

Not for nothin', Dave.. but I would be looking to talk to Billy Nees on this issue.. he will put you in the right direction, and/or build you a set..

MEXJOE · 11-22-2011, 11:26 AM

I would just call this guy.!

http://www.perfweldheaders.com/

Take a look at the E/SA & F/SA RECORDS!

He builds nice quality stuff and he is not a liar & HIS stuff fits and WORKS!

Wade_Owens · 11-22-2011, 01:12 PM

Quote:

Originally Posted by MEXJOE

I would just call this guy.!

http://www.perfweldheaders.com/

Take a look at the E/SA & F/SA RECORDS!

He builds nice quality stuff and he is not a liar & HIS stuff fits and WORKS!

X2, If he can help, he will. If he cant improve upon what you have, he will tell you that also.

and his car is bad fast!

Wade O

Dave1695 · 11-22-2011, 06:25 PM

Lots of great advise guys, thank you. I'll talk to all the recommended sources for sure. I plan on installing a new cam, so the header change can be done after a new base line is established. I was pretty sure the first pipe should be close to exhaust port size but had not considered a three step header. My combination runs under the index everywhere and I'm usually in the late rounds but you know how it is in Stock Eliminator, there is always room for improvement.

Alan Roehrich · 11-22-2011, 06:50 PM

Step headers offer a small gain, mostly what they do is increase average HP and torque. It is critical that the length of the primary and collector tubes is correct. You can actually get away with as large or larger an error in diameter than you can in length. A two step header (3 diameters) is worth just a few percent in peak power, but can be worth more in average power.

5343stk · 11-22-2011, 08:21 PM

Mark builds the best header I have used. They are a work of art. They fit without having to bust out the hammer. His customer service is second to none.

Keep in mind, there is a common denominator in our cars besides the headers. There is a gentleman in Missouri that seems to know his way around stock eliminator engines. I wish my car was as quick as his.

Wade_Owens · 11-22-2011, 08:51 PM

Quote:

Originally Posted by 5343stk

There is a gentleman in Missouri that seems to know his way around stock eliminator engines. I wish my car was as quick as his.

You are so right. Brad is aces on those small block Mopars!

11-21-2011, 08:07 PM	#22
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 92 Likes: 1 Liked 9 Times in 3 Posts	Re: header tube size everyone seems to forget that the cam is still the brain of this deal when it comes to headers. most of the time, off the shelf STOCKER cams are still very old designs and are not made to be as efficient as some headers are built or bought, no matter what your engine guys chooses.....truth is most engine guys miss on the cam and go to what they call, " ol' reliable cams...." but yet the racer seems to think better than the engine builder sometimes...and looks at his WHOLE combination...... Chassis1

11-22-2011, 12:44 AM	#23
K Stubbs Member Join Date: Aug 2008 Location: Benton, Arkansas Posts: 402 Likes: 0 Liked 20 Times in 3 Posts	Re: header tube size I know a racer that ran a 69 Camaro 350/255 auto stocker. He had a set of Kromer (sp?) step headers that were 1/12 - 1/58 - 13/4. He blew out a tube at a race and put on a straight 13/4 on that side and did not affect performance one bit. He ran it like this for a couple of years and won class many times including Indy. Like Wade said, unless you are way out in left field there is probably not a big performance difference in them.

11-22-2011, 10:24 AM	#24
Charlie Yannetti Senior Member Join Date: Jan 2005 Location: Alpine, NJ Posts: 568 Likes: 188 Liked 192 Times in 83 Posts	Re: header tube size Not for nothin', Dave.. but I would be looking to talk to Billy Nees on this issue.. he will put you in the right direction, and/or build you a set..

11-22-2011, 11:26 AM	#25
MEXJOE Senior Member Join Date: Jun 2008 Location: nhranumbers.com Posts: 875 Likes: 137 Liked 165 Times in 51 Posts	Re: header tube size I would just call this guy.! http://www.perfweldheaders.com/ Take a look at the E/SA & F/SA RECORDS! He builds nice quality stuff and he is not a liar & HIS stuff fits and WORKS!

11-22-2011, 06:25 PM	#27
Dave1695 Member Join Date: May 2009 Posts: 160 Likes: 0 Liked 15 Times in 11 Posts	Re: header tube size Lots of great advise guys, thank you. I'll talk to all the recommended sources for sure. I plan on installing a new cam, so the header change can be done after a new base line is established. I was pretty sure the first pipe should be close to exhaust port size but had not considered a three step header. My combination runs under the index everywhere and I'm usually in the late rounds but you know how it is in Stock Eliminator, there is always room for improvement.

11-22-2011, 06:50 PM	#28
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,110 Likes: 1,570 Liked 1,805 Times in 411 Posts	Re: header tube size Step headers offer a small gain, mostly what they do is increase average HP and torque. It is critical that the length of the primary and collector tubes is correct. You can actually get away with as large or larger an error in diameter than you can in length. A two step header (3 diameters) is worth just a few percent in peak power, but can be worth more in average power. __________________ Alan Roehrich 212A G/S

11-22-2011, 08:21 PM	#29
5343stk Junior Member Join Date: Oct 2007 Location: Zimmerman, MN Posts: 99 Likes: 0 Liked 1 Time in 1 Post	Re: header tube size Mark builds the best header I have used. They are a work of art. They fit without having to bust out the hammer. His customer service is second to none. Keep in mind, there is a common denominator in our cars besides the headers. There is a gentleman in Missouri that seems to know his way around stock eliminator engines. I wish my car was as quick as his. __________________ James & Kari Findell (2) 1973 Plymouth Duster's 340 NHRA Stock Eliminator