boostdummy

First off, I did search and there really is not a clear answer or dyno #'s to show what works with what power levels. So I thought I would try and get some feed back

I was wondering what Size HOT SIDE intercooler piping you guys recondmend for a 2.0L Motor running a T3/T04e 57 Trim @20+PSI I will be aiming for 350WHP.

I Have 2.5" on the cold side just wondering whats the best tot use on HOT SIDE 2.5" or 2"?

Thanks

Boosted Power

2.5" will go you more turbo lag.
2" can do your 350whp.
DSM guys run 2" on the hotside and push over 300whp.

bdavis

honestly man, you will not be able to tell the difference. do whatever is easiest

emotionisdead

i just have a stock b16 on 10psi, but i run all 2.5in excpet for a little foot long section of 2" right after the turbine outlet. i used to run all 2.5in but my traction bars and new downpipe made have to use that 2" section. i didn't notice a difference.

beepy

Quick math:

2.0 liters / 2 = 1 liter/revolution x 8500 RPM / 60 = 142 liters per second

142 liters x 61 = 8645 CI/second / CSA (2"/2)^2*pi / 12 = 229.31 feet/second.

229.31 feet/second / speed of sound (1185 ft/s for air at 2.5 atm and 120°F)

= Mach 0.19

Therefore the air is incompressible, therefore pipe losses are primarily determined by frictional wall losses, therefore 2" pipe is plenty for your goals.

Interestingly enough, the amount of boost has very little to do with how large of a pipe you need. The two primary factors are RPM and displacement. However, if you have an intake pre-turbo, you must recalculate the mach number based on mass flow at 1 atm. In this case, a 2" intake pipe pre-turbo would undergo velocities of Mach 0.46, which will have significant pipe losses. 3" pipe pre-turbo, however, will drop the Mach number to 0.20, for negligible pipe losses.

The numbers don't lie, but I still think a 3" intake pipe and 2" charge pipes would look funny.

boostdummy

thanks anyone else care to share an opinion?