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What size downpipe for S95/PT96mm

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Old 01-03-2007, 08:46 PM
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Default What size downpipe for S95/PT96mm
What size downpipe would be optimal for a 402" motor with either an S95 turbo or PT 96mm? 4" or 5"?
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Old 01-03-2007, 08:54 PM
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Originally Posted by Phil99vette
What size downpipe would be optimal for a 402" motor with either an S95 turbo or PT 96mm? 4" or 5"?
Both use a 5" downpipe flange/clamp.
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Old 01-03-2007, 09:59 PM
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yes you will have to run a 5 inch down
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Old 01-03-2007, 10:42 PM
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5" holy moly
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Old 01-03-2007, 11:30 PM
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You have to run it 5" right off the turbo, but I necked from 5" down to 4" on a GT47-88 build and it didn't have any trouble making 1200+ RWHP on a 4" exhaust.
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Old 01-04-2007, 07:30 AM
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remember some of us dont have room for 4" or 5" exhaust
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Old 01-04-2007, 07:41 AM
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you prob will have to reduce it to 4" anyways
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Old 01-04-2007, 09:04 AM
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My DP is 5" reduce to 4", pic here:
http://psj.ls1tech.com/gallery/main....&g2_itemId=220
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Old 01-04-2007, 09:24 AM
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Unfortunately i don't have pics yet but my buddys DP 5" reduced to 4" exactly like John ^ but diff. unit (GT42 series)

peace
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Old 01-04-2007, 09:47 AM
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As long as the Downpipe is larger then the exducer on the turbine you are fine.
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Old 01-04-2007, 10:17 AM
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Who sells reasonably priced 5" u bends?
Phil
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Old 01-04-2007, 11:50 AM
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Originally Posted by Phil99vette
Who sells reasonably priced 5" u bends?
Phil

Phil give Stenod a call.... 248-307-0056
I was going to do 5" all the way to k-member .... i even have some mock up pic's of mine....
We decided on the 5" to 4"
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