Re: header tube size
 

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.........

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

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.

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..

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!

Re: header tube size
 

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

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.

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.

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.

Re: header tube size
 

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