Opinions On Hot Pipe For Cooler

[luvpsi]

hey guys just finishing off my intercooler piping on the vl. the kit i bought had 3" cold side piping from intercooler to throttle body. however on the hot side it had 2.5" but the cooler is 3" in and out. i have one more pipe to make which is not in engine bay is from the hot side of cooler. now i was going to make this pipe 3" so it would go into intercooler easier or should i buy a reducer for cooler and have it go into cooler using 2.5" like the rest of the hot pipe?

would it boost in anyway making it 3"

[scotty nm35]

2.5 inch may become a restriction at around 400 kw, otherwise you are just gaining lag. What power are you chasing?

Its the intake to the turbo that needs to be large.

[luvpsi]

im going to be chasing around 300rwkw aventually but by then im going to get custom piping done. the kit had 2.5" from the turbo to the cooler however it was a vlt kit so i have had to modify it a little. thats why im asking if i should make the pipe from under air box to the cooler on the turbo side 3" or 2.5" considering from the turbo is aready 2.5".

sory for the confusion but this is not for the inlet of the turbo its for the hot pipe from turbo to the intercooler

Edited February 9, 2011 by luvpsi

[r33_racer]

Guess it depends on if you are going to be chasing more power down the line. If you are, then just make it 3" now and be done with it.

[luvpsi]

thats what im thinking i was just after opinions for now im only runnin stock turbo but within the next 6 months im looking at running a atr43g3. power goal is 300+rwkw

[lachlanw]

make it the same size as the turbo outlet

have a look at the R.I.P.S. F E D . from turbo to water box is only like 2.5(looks tiny ) from water box to throttle is 100mm . god knows what power that makes

[luvpsi]

damn this hard so many different opinions i think i may just run 2.5" from turbo to intercooler then from intercooler to throttle body leave it at the 3" that it is already at

[SimonR32]

2.5" will not be a restriction

[luvpsi]

all good guys im oing to make it 2.5" from turbo to intercooler and leave it at 3" from cooler to throttle body