3'' pre-turbo piping on 4'' turbo?
06-24-2012, 10:28 PM
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3'' pre-turbo piping on 4'' turbo?
I already have a 4'' piping that sucks air from the fender (cold air setup) on my GT30R for years now but I would like to regain some space in front of the radiator so I was wondering if a 3'' intake piping (pre turbo) would be bad performance wise for a 4" turbo intake? The car makes 420whp at 18psi and will never boost more then that. Thanks for your time!
06-25-2012, 05:33 AM
#2
Re: 3'' pre-turbo piping on 4'' turbo?
You have the 4" anti-surge compressor cover. The outside 1" is for the anti-surge ports. The intake diameter is truly only 3". So if you wanted to run a 3" intake pipe with a reducer to 4" coupler that would work just as good.
06-26-2012, 04:17 PM
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Re: 3'' pre-turbo piping on 4'' turbo?
Hum, I don't have pics but I can tell you a bit about the setup, I still have the AC and PS, my wastegate dump in the exhaust, I have a metal cat. It's quite busy up front with a full size rad! 
so If I can use a smaller pre turbo tube i'll be happy to gain that space, and I want to use a pre-turbo slash cut vacuum tube to vent my oil catch canister... so someday when this will be done, my car will finally smells good
so If I can use a smaller pre turbo tube i'll be happy to gain that space, and I want to use a pre-turbo slash cut vacuum tube to vent my oil catch canister... so someday when this will be done, my car will finally smells good
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