I could see using a timer on an SC...but only if you stay between 6-9k rpm for 3 hours at a time I'm not a fan of timers anyway, even on a turbo setup...you can save yourself a $100 just buy listening to the radio for a minute before shutting the car off.

 

A lot of new alarms come with built in turbo timers. So I took two birds with one stone on that one and very cost effective...very.

 

You stated the turbo doesn't spin with the engine off, and it clearly does.

 

It wasn't ever about the frictional heat from the turbine spinning. It's is so miniscule due to the oil and friction reducing additives that have bonded to the metal. The oil would sit on the bushing/bearing and the heat would just bake the oil which would leave a residue on it. Over time this constant build up of carbon and other products becomes significant and then the bearing/bushing cannot do its job properly. Thus it wears down on the center shaft and causes the turbine to wobble - considered to be a bad turbo at this point.

 

You stated that the turbine spinning after the engine was turned off was the reason why a turbo timer is needed. Which is also incorrect. You had the right answer but wrong reason.

In theory even if the turbine stopped right when the engine turned off you would still need oil going threw it to cool it down it has nothing to do with the turbine spining.

 

It's kinda pointless unless you drive your car at 9000 rpms all the time and skid into a parking spot and shut the car off all the time for some reason. It's usually a good idea to let the car idle for a bit after hard runs but no real need for a timer. I had one on my Supercharged MR2 only cause I was so cool and had to be different Wouldn't say it's needed on an SC car though.

 

It isn't needed at all on a S/C. It doesn't just get hot enough to be a critical problem.

"to be different"

 

Actually I said a SC is't spinning. We're splitting hairs at this point. I'm pretty sure we are both clear on why a turbo timer is used on a Turbo car, and why it's a waste on a SC'd one.