My Car! 1988 Toyota Supra Turbo Targa 5-speed

[HaPpYfAcE]

Well, all turbos, water cooled or not have oil circulating through them. Water cooling is just a method of using coolant as a heat sink to reduce the coking effect of oil in the turbo's center housing, increasing the longetivity of turbo life. I'd like a turbo timer to simply keep the car on after shut down so the hot oil can circulate out of the turbo instead of just sitting there. If you're saying that water cooling negates the need for a turbo timer, I don't think thats correct...I think its beneficial either way.

i agree. not a major necessity, but can't hurt.

with water and oil cooled turbos you don't necessarily need to let them run for over 30 seconds after driving. honestly it's a matter of preference here. that's plenty of time for oil to circulate out. after hard runs or extended boosting, a longer cooldown could be observed, but even at a minute, that's the time it takes to gather your things before exiting the car. just don't turn the car off first. /shrug.