what size IC piping

[jt15833]

got an ARC side mount and am going to get a friend to make up some hard pipes out of straights and bends, just curious whats the best size to get for best response? not really looking to push a ton of boost, 12psi on ARC and stock ca t25

[rico05]

On .80a/r T25G (Blacktop) and an ARC M070 sidemount, I have stock hotpipe (soon to be replaced with 2" aluminum) and a 2.5" coldpipe. Decent response, but turbo is a little laggy. Your bigger response maker is the turbo, not the piping at these diameters and boost levels.

[float_6969]

S15 T28. Core support mounted intercooler. 2" hotside. 2.5" cold side. 14psi. Approx 270hp (no dyno yet)

[jt15833]

lol im on a different turbo and different intercooler setup so i dont see the direct relevance of your post, good numbers however!

[sdtouge]

thing is i doubt anyone one here has used different sized piping except for a few people.they are like ya i use 2.5 cold side and it rocks! but what do you have to compare it to? your friends sr powered car? doesnt work sorry.anyways just use what you want people are just gonna suggest what they have. true story.