SS304 Manifold

[teamlorenz]

After looking at my cracked cast iron manifold i took the time to build 2 stainless steel headers. I figured i would sell one to help recop some of my cost. it does take alot of time to do it right but i think it was well worth it. the new header went right in and had it all bolted up in about 1 1/2 hours. now i am just waiting on the new turbo.


also New wheel and painted dash


>> Edited by teamlorenz on Saturday 10th September 01:45

[Dr.Hess]

Nice work. I didn't polish mine. Can't see it anyway.



Dr.Hess

[jk1]

Very nice Chris! Will be interesting to see how you and Dr. Hess make out with those.


So have you sold #2 yet and how much?

Jim

[cross-eyed-twit]

I would be interested to know how the stainless steel handles the heat. Both look solidly built and I expect you guys will have no problems but please do keep us informed.
South West Lotus are the only other after market supplier of manifolds to my knowledge, theirs are cast but look more robust than the lotus ones. They go for about £400 ISTR.
Dom

[Htown]

cross-eyed-twit said:

I would be interested to know how the stainless steel handles the heat.

Me too....

From,
http://burnsstainless.com/TechArticles/Stainless_article/stainless_article.html
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Within the 300 series of stainless steels, there are four types that are suitable, available and cost effective for the racer. These are 304, 316L, 321, and 347.

321 and 347 are known as stabilized grades of stainless. These are alloyed with either titanium (321) or columbium (347), both of which have a much stronger affinity for carbon than does chromium at elevated temperatures. This eliminates carbide precipitation leaving the chromium where it belongs for corrosion protection...remember our discussion of intergranular corrosion? Both 321 and 347 are top choices for exhaust headers, especially turbocharger systems and rotary engines. Since 321 is much more available than 347, that leaves 321 as the first choice, with no sacrifice in needed qualities.

316L is an extra low carbon (ELC) grade of stainless that has only .03% carbon, making less carbon available to precipitate with the chromium. It is used extensively in marine exhausts where salt water corrosion mixed with diesel exhaust particulates and electrolysis create such a horrible environment that even other grades of stainless cower and run away!

304 is the most inexpensive and available stainless in the 300 series. It is suitable for normally-aspirated header applications, and has been successfully used by many racing teams. It does not have the high temperature fatigue resistance that 321 does, but is considerably less costly and much more available. Most 304 tubing these days has the dual designation of 304/304L.
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[teamlorenz]

Yes i sold the second manifold, price was 1,750.
I have owned many road racing cars from Formula ford, atlantic to C sports racers all had 304 SS headers. 304 stainless is more than fine for a turbo in a street drivin car. if i had a turbo race car i would of used 321 or inconel. the differance in abuse from a street car and a race car is hugh so if anyone plans to build a header system you would just be wasting your money on 321 SS.
thanks
Chris