Pre and post intercooler temps

[viperguy]

howdy all,

have just installed thermocouples in the airflow pre and post intercooler....post intercooler at cruise sits a couple of degrees above ambient which is fine, however pre intercooler temp sits consistantly at about 35-40 degrees at cruise

...can anyone confirm such a high temp at cruise, as i would have expected ~ambient temps through the turbo if it wasnt making pressure

or is there just that much heating of the air as it passes through the turbo due to the coupling with the exhaust via the turbines?

[Guest]

I believe there is a lot of heating that's why people are using meth/water injection systems to drop the temp, I have seen one set up that saw a drop of about 20 degs

I think that's why people use ice box's on drag cars?

[Guest]

From what i have seen of other tests its similar.

Im sure when you start the car from cold its the same tho.

The exhaust housing of the turbo heat soaks the compressor, try touching your comp cover after a drive !

So as the air passes thru it heats up.

Its probably also heating up as it goes thru the airbox/afm/turbo inlet pipe etc.

[Joker]

yup about right

[viperguy]

 Qwerty said:

From what i have seen of other tests its similar.

Im sure when you start the car from cold its the same tho.

The exhaust housing of the turbo heat soaks the compressor, try touching your comp cover after a drive !

So as the air passes thru it heats up.

Its probably also heating up as it goes thru the airbox/afm/turbo inlet pipe etc.

After starting from cold this morning on the drive into work, the pre intercooler temps started about 3 degrees warmer than the post int temps ( 9 vs 12 degrees) climbing over the 15 minute drive to work to around 12 post intercooler, and around 20 pre intercooler

I must get some logging organised...