Headers

[jmcarter]

[QUOTE=nhramnl;583832]A number of guys have found that they had to reduce the clearance in the dingle arm, when going from 4-into-1 to tri-Ys. Those that didn't experienced terrible Sinusoidal Refleneration, which is exactly like radial wobble, but different.[/QUOTE

[Alan Nyhus]

Elston tri-y's are better everywhere on my 327 Stocker...down low, in the middle and up high. -Al

[Glenn Briglio]

Originally Posted by Alan Nyhus

Elston tri-y's are better everywhere on my 327 Stocker...down low, in the middle and up high. -Al

How much better?

[Alan Nyhus]

Originally Posted by Glenn Briglio

How much better?

Glenn, I'm hesitant to post a number because all combinations are different. -Al

[Glenn Briglio]

Originally Posted by Alan Nyhus

Glenn, I'm hesitant to post a number because all combinations are different. -Al

On your combination. And what were headers before the tri y's.Not asking for hp figures, just the increase.

[Ed Wright]

Sure depends on your combo. A Stocker, since they foot brake, might like Tri-Y, or steps.

I realize I don't know much, much, but my 350" LT1 SS car hates that stuff. I talked to Jere Stahl about that a lot. He had me mail him dyno data and time slips, car weight, and data logs from passes at the track. He told me "for certain 1 7/8" primaries", and could very well like 2" (In decent air.) He said "there is no way that car wants step headers. We build some now, but I would not sell you a set for that car."
His regular 1 7/8" headers were so much faster (Like a tenth & 1+ MPH) over my 1.5"-1 3/4" steps). At the time I could not afford to gamble on a set of his 2" headers that "it might like". I had a set of Hedman 1 7/8", but could not get all the plugs in & out, keep the wires off the tubes, and they hit the ground on landings, and had to jack the front of the trailer way up to get the car in & out. His were faster than those others, and everything cleared as well. By far the best headers I've had. His were the best & fastest on all my other cars over the years as well. I miss him.

I made the mistake of shipping my Stahl headers to the west coast, after Jere passed, for some other header guys to build a jig for the '93/'97 LT1 Camaro/Firebird cars. When I asked for them back, they had cut them up.

[Billy Nees]

Originally Posted by Ed Wright

I made the mistake of shipping my Stahl headers to the west coast, after Jere passed, for some other header guys to build a jig for the '93/'97 LT1 Camaro/Firebird cars. When I asked for them back, they had cut them up.

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[Alan Nyhus]

Originally Posted by Glenn Briglio

On your combination. And what were headers before the tri y's.Not asking for hp figures, just the increase.

On the dyno at Matt Steen's Victory Engines, we tested straight 1-3/4 dyno headers with a standard collector, Hooker straight 1-3/4" with a Performance Welding merge collector, a set of good 1-5/8" to 1-3/4" step headers with the same merge collector and the Elston Tri-y's.

Average h.p. on the Elston's was up 12. -Al

[Ed Wright]

Alan, the engine was for Stock, or Super Stock?

[Glenn Briglio]

Originally Posted by Alan Nyhus

On the dyno at Matt Steen's Victory Engines, we tested straight 1-3/4 dyno headers with a standard collector, Hooker straight 1-3/4" with a Performance Welding merge collector, a set of good 1-5/8" to 1-3/4" step headers with the same merge collector and the Elston Tri-y's.

Average h.p. on the Elston's was up 12. -Al

Thank you Alan, did you change cam or anything when going to tri y's