first attempt at a turbo manifold

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first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 12:05 am

Here is a manifold turbo 325ii and i tried with some spare stainless i had. I welded most of it with my crappy 100 dollar wire feed welder and then took it to my house and tried to smooth the welds a little bit and welded the cast iron part but the tig welder was running out of argon so the welds are oxidized and crappy. its not pretty but has the most beautiful placement in the car i dont know where my picture of that went.

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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 12:10 am

take a grinder to it and itll be fine. As long as it doesn't leak and it penetrated (thats what she said) youll be fine. Better than I could do!
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 12:16 am

yeah im going to smooth it up with a grinder. I didnt care about the welds when i saw my argon was low i just went fast and good.
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 12:19 am

looks good, but is it a true split pulse, because I didn't think you could do that using the OE exhaust manis?
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 12:22 am

M20_fever wrote:looks good, but is it a true split pulse, because I didn't think you could do that using the OE exhaust manis?


Yes you can. Since the stock headers split the cylinders equally (123 fire opposite of 456) you can easily make a split pulse with it.
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 1:33 am

interesting, what is the routing on that mani?
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 1:06 pm

what do you mean by routing?
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 1:57 pm

for it to be a true split pulse manifold the individual cylinders need to be routed so they alternate pulses to each side of the split housing. Thats why I thought you couldn't make a true split pulse with stock exhaust manis, because the routing for a true split pulse is not 123 456 which is how the OE manifolds put out.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 2:19 pm

Eh? I thought thats EXACTLY how split pulse works?

The engine firing order is:1-5-3-6-2-4 (http://www.e30tech.com/forum/showthread ... ring+order)

So it would fire, 1/2/1/2/1/2 (1 for front header 2 for second)

sounds about right to me.
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 2:37 pm

yeah, your right I did a little looking. Huh, so I guess I will be ok if I ue the OE manifolds for a split pulse Holset, cool.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 2:44 pm

It's perfectly acceptable. Most people go equal length when they do it but eh whatever. This works fine. Altho the OE manifolds don't flow as well as what you can make yourself.
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Re: first attempt at a turbo manifold

Postby Boots » Wed Jun 17, 2009 6:24 pm

i would have done equal length but there wasnt alot of room where i decided to put the turbo placement. they say equal length doesnt matter a whole lot unless your trying to squeeze every bit of power out of your setup. i was going to make it similar to the volk or pro turbo adapter like the one we had before but it puts it too far forward and makes it a pain to put an air filter on because its so close to the radiator. I wanted it to fit better with out the trouble of building a whole new manifold and i did it on a budget. the total cost was maybe 20 dollars for everything.
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 6:26 pm

I need to do that... looks cheap AND effective.

How thick are the stock headers?
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Re: first attempt at a turbo manifold

Postby M20_fever » Wed Jun 17, 2009 6:27 pm

wow, thats cheap. I am assuming your not counting the cost of the tubing?
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Re: first attempt at a turbo manifold

Postby Yoshi » Wed Jun 17, 2009 6:32 pm

oh wait you welded onto the stock down pipes. You went from mild steel to stainless? word...
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