hi mates!

i d like to know how many degrees of temp, is the compressed air after turbo, and before intercooler.
lets say that it is a stock turbo evo with 1.5 bar pressure.
anyone who had measured it?

thanks in advance,and sorry for my bad english.

 

Well, it matters on several factors, including the pressure before the turbo (baro), the pressure after the turbo, the temp before the turbo, and the efficiency of the compressor at the RPM, boost, and VE that you are referring to.

Here are the equations that you can use....just plug in your own numbers:

T2 = [T1 (P2 / P1)^.283]
T3 = T1 + (T2-T1)/C.E.

where
T2 = Outlet Temperature(not including compressor efficiency) in °R
T1 = Inlet Temperature in °R
P1 = absolute Inlet Pressure, in psi (pressure in psi +14.7)
P2 = Absolute Outlet Pressure, in psi (pressure in psi +14.7)
T3 = turbo outlet temp
C.E. Compressor efficiency, where 100 = 1, 50% = .5.
°R = °F + 460

So, a quick example:

Let's say your intake temps are 70F, your baro is 1 bar (14.5 psi), your boost is 22psi and your compressor efficiency is 65% (say at redline for stock turbo):

T2=[530(36.7 / 14.5)^.283]=689R
T3=530+(159/.65)= 775R (-460 to get to F, 315F)

So, the final turbo outlet temp would be 315F. Actually, it would be even a bit higher because the 22 psi you read on your gauge is after the pressure drop of the IC. If you have a 2 psi drop from your IC, the turbo is seeing 24 psi, not 22. This is why a good IC is very important, especially when running a turbo outside of it's efficiency range.


Eric

 

thanks Eric!!