Custom downpipe sizing
#1
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Custom downpipe sizing
I am planning on having TurboTony make me a custom downpipe for my CarTech/IHI setup. My question is what size should I pick. Is there some sort of formula for pipe size, is there a relationship between the output hole in the turbo housing and the downpipe diameter. Should they be equal? Larger? Can it be to big?
Thanks
Graham
Thanks
Graham
#8
the actual outlet of my 16g is also only about 2" as well and yes it makes a difference. most notably in spool time. I also picked up about 20 free hp by switching to a 3" exhaust after the dp. although it may be diffucult to get to 3" at the flange it does have some benifit to go big as soon as you can. it's not a must but it is better.
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