ralley

When you put a larger (front mount) IC in you lose 1-2 psi from what I understand. If you have a boost controller can you readjust the boost to compensate the loss?

Audi2ptzero

You might lose a few psi but that also comes with lower the air temps after the fmic. Your not going to lose power because of the lower psi, your actually going to gain since the air temps are lower and you can run a little more adv timing.

ModifiedA4

when an IC is spec'd at 1-2psi loss...

thats the loss due to turbulence in the IC and not the thermodynamic loss, right?

QCRAZY

That's the pressure drop through the IC at the specified air flow (flow loss).

cuatrokoop

You can have turbulence in either a factory or aftermarket IC. Just depends on the core length and flow velocity. Critical Reynolds number for turbulent internal (pipe) flow to occur in steady state is 2300. Doesn't take much to reach that with air going through an engine.

The pressure drop is a function of the length more so than anything else, as the restriction size (tube "diameter") is pretty much fixed for IC cores that I have seen.

ModifiedA4

ok...so measured pressure loss will be higher if the intercooler is working.

ModifiedA4

on how ICs are rated.

QCRAZY

Yes, a little.