first attempt at a turbo manifold

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Boots
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 7:29 pm

the tubing is about 16 gauge 304 stainless i got a china civic header that had a defect and chopped it up for 2.99 or so plus like 10 dollars shipping i think and the cast stainless t3 flange on ebay for about 7 dollars. and i used stainless bailing wire/ tie wire for filler rod it was way cheaper than actual stainless welding rod.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 7:30 pm

what have you done to prevent cracking between the two metals? they do expand at different rates.
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 7:48 pm

what two metals, he used stainless for everything?
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 7:50 pm

I thought the down pipe was regular. I guess it's chopped up china down pipe.
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 7:56 pm

i think the stock down pipes are 409 stainless it seemed like, most factory stuff is. i could be wrong though.
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 8:02 pm

when things are tig welded it less susceptible to cracking because it creates an alloy of the two metals in the molten puddle so it smooths the transition of materials more so than mig welding.

the part im concerned about it the cast iron cracking i used stainless filler on it and preheated it and ran several passes around it because it cracke when i tried one pass and let it cool down so i had to heat the whole part and let it cool slowly.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 8:06 pm

I thought stock pipes were mild steel. Hmm...
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 8:23 pm

The stock manifolds are cast mild steel, but he bolted to them, not welded.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 8:29 pm

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Yea but if you look, the down pipes that bolt TO the headers are stock. I think those are mild steel.
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 8:39 pm

what makes me think they are 409ss is because they barely have a light surface rust and its 20 years old in salty utah winters and right next to the hottest part of the exhaust. usually mild steel would under high temperatures degrade and oxidize way more than that. but im just guessing
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 8:42 pm

now I see Yosh, yeah I dunno about that. I guess only time will tell! :)
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 8:44 pm

I wonder how much stock headers and fucked up DP would cost me. I could put that together fairly easily. Altho I already have my ebay mani.
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 9:05 pm

my next manifold since i went 24v will be full tubular or semi log style i dont know what im going to do with this one now maybe put it on my ix. my next one will be a bunch of cheap ebay headers for civics or whatever is cheapest since i can buy those almost as cheap as one or two bends of stainless elbows anywhere else.
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Re: first attempt at a turbo manifold

Postby ten2doyle102 » Wed Jun 17, 2009 10:00 pm

Just take a magnet to it. Most s.s. isn't magnetic. Atleast the stuff we deal with here isn't.
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Re: first attempt at a turbo manifold

Postby Boots » Thu Jun 18, 2009 12:18 am

400 series stainless is magnetic. stainless that has ferrite is magnetic to different degrees. if it can get slight surface rust it means it has ferrite in it. while on the other hand the 300 series stainless has austenite which wont rust and a is non magnetic.
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