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Old 12-27-2011, 02:13 PM   #1 (permalink)
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Twin Turbo DIY

I'm looking into building a set of twins for my truck since I can't afford a big name set.
I'm wanting to use my 64/71 over an s480 along with a SteedSpeed manifold.
I don't know anything about routing the piping. If I get a steedspeed manifold, do I need a t6 flange or T4? 45 angle on the manifold or straight? Does the big turbo bolt directly up to the manifold or does the little one. My 64/71 is wastegated, is that the only one I need or do I need to get an external one?
Where does the piping go? On the cold side starting from the filter, would it go into the little one first and then the big one or the other way around? Same question on the hot side, into the big turbo and then wastegate it into the little turbo?
From what little reading i did it looks like people use 3 inch schedule 40 pipe. And the big turbo is the primary and the little one call the atmospheric turbo? Also it looks like the big turbo usually has a T6 flange.
I can probably make my own piping for the most part.
I'm wanting between 700-800 hp, I can't afford more than that. 700-750 would be perfect. As far as fueling I suppose my 100's are too small, maybe 120-150's?? And Todd at tc diesels 60% over cp3. I'm gonna rebuild the transmission myself with DTT's kit. I wanted to pull the truck originally, but decided not to mess with it. It's a daily driver.

Thanks for input!!!!
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Last edited by jordylee18; 12-27-2011 at 02:18 PM.
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Old 12-27-2011, 04:35 PM   #2 (permalink)
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Do your self a favor and search.

From your post you seem in a bit over your head.

Twin piping can be had for around 1200 bucks.
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Old 12-27-2011, 04:39 PM   #3 (permalink)
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I agree with estrada, you need to research quite a bit more. Building your own twins piping is a very daunting task that I have only seen a select few guys do.
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Old 12-27-2011, 06:16 PM   #4 (permalink)
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^^^ Its not difficult at all expecially if you have a block and head to moc everything up on. You will want a t4 manifold for the s300 based secondary. Here are a few pictures from the last set I built













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Old 12-27-2011, 06:18 PM   #5 (permalink)
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