skiracerblah

I came from the turbo world and know minimal about superchargers. In the S4, do i need to let the engine idle for a minute or two after stopping to cool down the supercharger?

I know with turbo'd cars, you should do it to let oil circulate thru the turbo to prevent the oil from burning up inside .

Aggie88

Turbocharger impellers are driven by hot exhaust gases and build a lot of heat. The supercharger rotor(s) are driven by a belt.

skiracerblah

So, no motor oil circulates thru the supercharger at all?

Aggie88

There is oil in the supercharger. But I don't know if it is internal to the engine sump or external. But the oil does not see those extreme temps like a turbocharger sees. Here is a great Servie Training manual download of the engine:

http://www.s4-mtm.com/images/925803_3.0V6TFSIengine.pdf

skiracerblah

Sweet, thank you!

tianxiai

so can also

tenspeed

That was excellent. I spent the last couple of hours reading.

dtmurf

Just finished reading this and wanted to say thanks for posting it!

auditechjs

To the OP, no, you don't have to let it idle. The car has what's called an "after-run coolant pump" that circulates coolant thru the supercharger intercoolers so they don't overhead from heat soak.

-Jesse

Big_Daddy_THX1138

+1 fantastic.

I want the entire book for my brand new S4 now...