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exhaust on turbo?

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Old 03-18-2014, 08:45 AM
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Default exhaust on turbo?
What size pipe is being used from exhaust manifold to t4 flange on a 5.3?
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Old 03-18-2014, 09:57 AM
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i use 2 in on my 72mm... miss-read thought it said exit from turbo
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Old 03-18-2014, 10:00 AM
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I used 2.5 I would have went smaller had I known it was overkill for my setup
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Old 03-18-2014, 10:12 AM
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Originally Posted by Speedy911
I used 2.5 I would have went smaller had I known it was overkill for my setup
What setup you have? Im going with on3 twin 70's with 68 ar
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Old 03-18-2014, 10:23 AM
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2" ..... 2.5 is retarded
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Old 03-18-2014, 10:38 AM
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I have 2.5" which is retarded now that I know and will be replacing it with 2.25" on my S475.
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Old 03-18-2014, 10:57 AM
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Keep up the good info... thanks guys!!
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Old 03-18-2014, 01:17 PM
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We used 2.25 merged to a single 3" for a t4 s366 turbo on a 4.8l.
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Old 03-18-2014, 02:33 PM
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i did 1 5/8 primaries to 2" crossover to 2.5" into the turbo
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Old 03-18-2014, 04:11 PM
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This is a heavily debated argument.. take your pick. I went 2.5" to my twin T61's
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Old 03-18-2014, 04:26 PM
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Originally Posted by rollwithit
What setup you have? Im going with on3 twin 70's with 68 ar
.90 on a both Warner s375. Many setups lately have proven such big piping isn't necessary
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Old 03-18-2014, 04:38 PM
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Originally Posted by Speedy911
.90 on a both Warner s375. Many setups lately have proven such big piping isn't necessary
I've seen evidence both ways. IMO there are a lot of variables to consider when saying .5" either direction is better or worse, Im no expert though.
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Old 03-18-2014, 05:57 PM
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Go 2" It's cheaper than 2.25" tubing and more readily available v bands and such as well. It's also been proven into the 8's.
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