intercooler piping

[rsx84]

looking for ideas on piping size for a standard rb20det with a new fmic setup, the intercooler has 3"inlet and 3" outlet, one of the hybrid 600mm,300mm,75mm ones!!

Cheers.

[BHDave]

Id stick with the factory size piping, 2.5 inch or so or even 2 inch with a 3 inch flair on the ends. The smaller piping wont cause a restiction on a mildly modded engine.

If you get 3 inch piping all the way you will have more lag when you change gears as you have a greater volume in the inlet tract that has to be presurised.

[Sydneykid]

Hi rsx84, we use 62 mm (2.5") from the turbo to the intercooler and 75mm (3") from the intercooler to the throttle body.

[rsx84]

the mods for now are 3" exhaust turbo back, chipped ecu and 12psi.

sydneykid-do you find you lose any psi using the 3" piping to the throttle body?

[MJ]

Wouldn't it just be easier to buy the hybrid fmic kit and all the pipes are there for you ready to connect up?

[5 litre eater]

"Wouldn't it just be easier to buy the hybrid fmic kit and all the pipes are there for you ready to connect up?"

I've heard some good stories about the Hybrid kits, and i've heard quite a few bad stories abouth them...

I'm stuck in the same boat as RSX84, in that i've got the cooler, i just need to know what size piping to get, and which path to run it... Should it go along the standard path, or shoud it come up and over the fan shroud?

[rsx84]

my problem is the rb20 is not in a r32 its in a r30 and have been told the piping kit from hybrid might fit, now thats a $500 might fit, i'm getting custom piping made for me here on the coast that are a perfect fit for $400. Not to mention powerdigger would not sell me just the piping kit???

5liter eater- i'm following the path of the hybrid pipes over the fan shroud.

[MJ]

sorry rsx84 i should have noticed you had a r30

yeh id definately be getting the custom piping then, i dont think u can go wrong with 2.5" or 3" i guess whatever works out easiest to fit would be the best