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intercooler piping size

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Old Mar 28, 2010 | 03:24 PM
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Default intercooler piping size
im going with a 35r and a built block on my gsr and i have some 2'' piping laying around from the old setup. will that be big enough or do i need to go 2.5''
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Old Mar 28, 2010 | 03:39 PM
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Default Re: intercooler piping size
2 and half is what i would use.
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Old Mar 28, 2010 | 06:01 PM
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Default Re: intercooler piping size
just use it and see what happens, worst case scenario you go get 2.5 inch after anyway
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Old Mar 28, 2010 | 09:29 PM
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Default Re: intercooler piping size
anymore input
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Old Mar 28, 2010 | 09:42 PM
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Default Re: intercooler piping size
2.5
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Old Mar 28, 2010 | 10:38 PM
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Default Re: intercooler piping size
there was a big thread on this I saw a while back. it showed how much hp you can flow on what size piping and I think 2" didn't become a restriction till almost 500whp. try looking for it. what is your whp goal?
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Old Mar 29, 2010 | 09:52 AM
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Default Re: intercooler piping size
im hoping for 450whp
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Old Mar 29, 2010 | 11:58 AM
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Default Re: intercooler piping size
Originally Posted by K7-1Ktrevor
there was a big thread on this I saw a while back.
Here it is... for future reference, you can find this in the Forced Induction FAQ at the top of the forum

https://honda-tech.com/forums/forced-induction-16/when-does-2-5%22-intercooler-piping-start-become-restriction-2409417/
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Old Mar 29, 2010 | 12:06 PM
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Default Re: intercooler piping size
I've been told start running 3" piping above 700whp+ on my Kseries.
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Old Mar 29, 2010 | 01:11 PM
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Default Re: intercooler piping size
Outlet on the gt35r is usually 2.5".

Go 2.5" or larger. No point of bottlenecking the compressor outlet size.
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Old Mar 29, 2010 | 02:30 PM
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Default Re: intercooler piping size
2.5 would be my choice. 2'' is tiny
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Old Mar 29, 2010 | 03:28 PM
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Default Re: intercooler piping size
I would say do 2.5 or 3. 2inch is tiny
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