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Quote:

Originally Posted by rmbuilder (Post 2183243)

Rob,

Probably all of that and then some. The big plus in going with Jack Burns is not only the materials and workmanship ( and weight savings), he is absolutely at the top of the game in exhaust science from F-1/Cup/ALMS/LeMans/NHRA. The benefit is in the end result you will be optimizing both power and TQ placement. I have a report on a set of marine headers he did, here is an excerpt:

"We designed and made improved headers for a 562 cubic inch
Chevrolet jet drag boat engine that produces 950 bhp," reports
Jack Burns. "This engine breathes through a tunnel-ram manifold
fitted with a pair of four-barrel Holley carburettors. The engineering
exercise required designing, constructing and tuning the exhaust
to maximize the power curve in a narrow band: between 6600 and
6700 rpm.
"We utilized our DesignSYS software and built the header
shown in the accompanying illustration. We utilized our adjustable
BTEC collector system. The baseline headers were good-quality
commercially available racing units.
"On a SuperFlow dyno, our system improved peak torque by
24 ft.lb. and increased maximum power by 14 bhp. But the target
was to increase power in the 6600-6700 rpm range, which we
increased by 21.5 bhp. Overall, the powerband broadened during
the dyno test runs from 5500 thru 7500 rpms, with an average
torque increase of 16 ft.lb. and average power increase of 20 bhp
compared to the baseline."

Bob

Thats a pretty good increase in just header design over a already race set of headers,Bob is the Jack Burns the one from Burns Stainless exhaust ? That name seemed failmure from the PRI show.

http://www.burnsstainless.com/

Ck out this on the Inconel tubing
http://www.honda-tech.com/zerothread?id=1378601

Also I got to thinking , on the tail pipes. If you do some searching, theirs a lot of the sport bike exhaust companys that make titanium headers fro the if you could get one of them , I be they could make a set more reasonable than someone that makes them for F1.

might find some name brands
http://www.hondamarketplace.com/zerothread?id=1944162

http://www.nengun.com/js-racing/tita...exhaust-system

I had a friend with a racebike that had custom swingarm and plastics therefore had to have a pipe built for it.. He had a local place here in tulsa weld a full titanium system up and it cost him around $600..which is about dead even with the cost of a NEW ti system. His had about athousand different welds in it, no bends at all.. not sure why, thats just how they had it done..

Waterboy 222 , I went to flight school in Tulsa...Neat area.

What type of fab shop did your friends suspension ? Possibly those people can offer food for thought,that is,if you were to have time to visit with them.

Ti and Inco 625 are both very weldable by those competent and knowledgable in their respective properties. The trick with the Ti is in choosing the proper alloy Ti as it is with choosing the right alloy of Inconel. There are several alloys of both that are designed for specific uses. The Inconel will very likely give better long-term salt-water durability, which might help with the offset of greater cost over the stainless currently out there. The Inconel does have a greater density than the stainless, and greater than most other materials you might use in this application.

Density of Inco 625=8.44g/cm3
Density of Titanium=4.5g/cm3
Density of 304 SS=8.03g/cm3

Both the Titanium and the Inconel polish up nicely and hold their shine. Both have pretty good heat stability. I'm a little out of touch with the current markets for tubing of either material, but there are lots of sources for both, and both are readily available in numerous OD x wall thicknesses. They won't be cheap.