[DeTomaso] Header ideas for discussion

michael frazier red3644 at hotmail.com
Tue Mar 6 18:56:05 EST 2012


Dats what I was getting at!

From: MikeLDrew at aol.com
Date: Tue, 6 Mar 2012 18:21:56 -0500
Subject: Re: [DeTomaso] Header ideas for discussion
To: red3644 at hotmail.com; detomaso at realbig.com



In a message dated 3/6/12 13 13 0, red3644 at hotmail.com writes:







Why did some racers, GT-40s, use 180 headers and McClarens & Lolas (even with Ford engines) not.

There was room for either type.





It was a short-lived technical dead-end, I think.   While there were theoretical benefits to the bundle-of-snakes exhaust, the practical benefits didn't outweigh the weight, cost and complexity, and the idea quickly fell out of favor, particularly as engines started making more power and revving higher.



There are some roundy-round race cars that still use 180-degree exhausts, such as this one:



http://www.speedwaymotors.com/Schoenfeld-Small-Block-Chevy-180-Degree-Headers,3517.html



This uses two collectors stacked vertically rather than side-by-side like we're accustomed to, but the theory is the same.



Burns Stainless has some good info on the 180-degree design here:



http://www.burnsstainless.com/bundleofsnakes-2.aspx



If maximum efficiency and performance is the only design criteria for a Pantera exhaust system, I think an over-the-top speedboat-style 4-into-1 system with a crossover would be the best bet.



Mike 		 	   		  


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