Tri Y vs. Conventional Header....
 

Has anyone seen any advantage with a Tri Y over a Standard header in a stocker setup, WITH THE SAME CAM? I run a modified set of Lemon's Headers and want to explore a little on the topic. I know some have shown better numbers after a cam swap, but it seems to take several tries to make a small gain. Not dis-satisfied with what I have, just pecking......

Wade O

Re: Tri Y vs. Conventional Header....
 

Wade,
I wouldn't be dis-satisfied with the way your car runs either. I was at Indy last year when you were running class and I swear the headers were spitting HP.

Re: Tri Y vs. Conventional Header....
 

Wade get in touch with Bill Grubb, he had those tri-y's on Brenda's car when it had the small block program. He'll tell you straight. I have a set on my stick car but, haven't been out yet. Jury's out........

Re: Tri Y vs. Conventional Header....
 

I bought a set of Elston,s Tri Y's and didn't change anything else and saw about eight hundreth's.

Re: Tri Y vs. Conventional Header....
 

Flowmaster's 4-2-1 Scavenger collectors were worth 8 hundreths on my 468 BBC running a 1 3/4" primary tube header.

Re: Tri Y vs. Conventional Header....
 

Wade,
Beautiful car!!! I wanted to say hi at BR, but could not find time.

Anyway, to answer your question (it is at the bottom of the page) ----> http://www.popularhotrodding.com/tec...ech/index.html

Bill Grubbs

Re: Tri Y vs. Conventional Header....
 

In order to gain the most from a tri-y or 4-2-1 header, the camshaft needs to be correct for the header. By the way, so does the firing order. The tri-y or 4-2-1 header allows you to do things with the camshaft that most 4 into 1 headers will not allow, due to sizing and tuning requirements.

If you have, for what ever reason, an exhaust lobe that is too small, the tri-y will improve scavenging. Of course, if your valve or port is so small that you cannot get enough cam lobe on the exhaust, the tri-y will help there, too.

For a Chevrolet V-8, the "A" firing order, 1-8-4-3-6-5-7-2, and the "C" firing order 1-8-7-2-6-5-4-3 (AKA 4/7-3/2 swap) will work on the same tri-y header. The "B" firing order, 1-8-7-3-6-5-4-2 (AKA 4/7 swap) requires a dedicated tr-y header. Some merge collectors, as well as the Flowmaster "scavenger" collectors are also firing order specific.

Re: Tri Y vs. Conventional Header....
 

Preach on alan!!!!!!!!

Re: Tri Y vs. Conventional Header....
 

Alan can preach on all he wants as I have read many to hundreds of his posts and the man is a wealth of information that I enjoy and appreciate. He is a straight shooter and right to the point . I would not think twice about PM ing for information I might need. Never met him and only recently seen a picture of him and I respect him. A good man on the forum .-------John

Re: Tri Y vs. Conventional Header....
 

I also have a side line. I stand in as a scarecrow for farmers. It's boring, but it pays, and nothing will go into one of those fields if it has any sort of decent eyesight.