Piston Pete

Or Do they only spool up while driving at higher RPM's? My concern is with the turbos getting sufficient oil so they can operate, warm and cool properly on short runs to the store or running errands.

Thanks,

Ant

maxpesce

They spin all the time. The are fed OIL by the main engine oil pump and so get fed oil as long as the engine is running.

JONSKI

Doesn't the wastegate stay wide open at idle? If the wastegate is open, then how do the turbos spin?

When does the wastegate start to close, anyway? Is it electronically operated, or is it hooked up to the accelerator?

NickSimcheck

I'm sure they spin a little bit at idle... maybe 15 or 20 RPM's

turbojeff

iTrader: (30)

Wastegate is closed at idle, the wastegate is hooked up to a solenoid that runs a duty cycle feeding boost pressure to it, the higher the duty cycle, the farther it opens. It is impossible for it to be open at idle.

The turbos do get oil pressure from the motor all the time, don't worry about lube during short trips. It is harder on the turbo housings, heat cycling promotes cracking. Either way don't worry about it.

I dunno if the rear turbo will spin much (hardly any exhaust getting to it) but the front one should be spinning much faster than 15-20 rpm. Probably several 100 rpm or a few thousand rpm. Since the FD doesn't have a MAF you can pull the intake hose to the front turbo and start the car and look at it. I bet that sucker is spinning pretty fast, especially at cold idle. I've seen a turbo on a different motor spinning fast at idle. I didn't have a strobe light to measure it's speed, but it was spinning faster than the crank.

Jeff

Piston Pete

Awesome fellers, thanks. Anyone else?