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Old May 3, 2006
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Downpipe?
When I got my car tuned Minh who tuned it said that the turbo would not spool pass 10.5 because there was a restriction. He adviced me to upgrade the downpipe and exhaust. Right now I have the downpipe that came with the TSI kit and a Apexi 2.25 exhaust system minus the cat converter. Any input would be great in letting me know what size downpipe and exhaust. Thanks
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Old May 3, 2006
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most of the time 2.25 is used for n/a car maybe 3.0 all the way back..the person to ask is turboengnr or boiler .....at most if it can fit three all the way back should good.
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Old May 3, 2006
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3.0 is usual for turbo applications but im running a t3/t4 right now on the stock downpipe actually and the car still pulls pretty hard so i dunno...whats stock downpipe size? sorry to get off topic. simple answer is run 3"
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Old May 3, 2006
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depends on the size of the turbo, I think 2.5 or 2.75 is fine for a T3 or a hybrid 3/4 you could go 3"... less restriction is always better, but size constraints start getting fun.
Also if you've got resonators, etc... in the exhaust and they're baffled, or the perferated tube kind, get them out... they're clogs.
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Old May 9, 2006
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Its a t25 and I thought that 3" might be overkill but let me know Boilermaker1. Thanks
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Old May 9, 2006
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Do you have a boost controller? lol. try using one of those first to raise the boost if you dont have one. 10.5 is a little much on a stock engine. Why do you want more, or are you built up?
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Old May 9, 2006
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Originally Posted by 03EXD17
Its a t25 and I thought that 3" might be overkill but let me know Boilermaker1. Thanks
Yeah, probably overkill on a 25. I'm running a 2.25. 2.5 would also be fine.
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Old May 9, 2006
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Yeah I have a turboXS dual stage controller. I'm thinking about Dezods downpipe and a custom 2.75 exhaust system.
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Old May 9, 2006
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Originally Posted by 03EXD17
Yeah I have a turboXS dual stage controller. I'm thinking about Dezods downpipe and a custom 2.75 exhaust system.
You mean our new v3 one???

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Old May 10, 2006
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Exactly Dezod.................
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Old May 10, 2006
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Running 10.5 lbs, I would upgrade your fuel system before you upgrade your exhaust. Better yet, upgrade your exhaust and stick to 8-9 psi.
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Old May 11, 2006
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I've already upgraded my Fuel system to the best product thats in the market for our cars AEM EMS
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