is revving a turbo car bad? causing compressor surge?

Question

friend of mine says that revving a turbo car creates compressure surge and is bad for the bearings in teh turbo. i was just wondering this, cuz i don't know too much about them

Answer 1

Revving is not good for any car. With turbo, there is an oil pressure drop and the poor thing is spinning at 50,000 plus rpms, which could "grenade" it quickly any time you let off the throttle.

Answer 2

Yeah but sounds cool! I wouldn't sweat it too much as long as you let it idle down for a few minutes before you turn the engine of. The oil pressure that feeds the bearings ceases to exist as soon as you turn off the engine, however the turbo will continue to spin for a bit. That is why you want to be sure your turbo is spinning as slowly as possible when you turn off the key.

I think the whole don't rev your engine thing follows along the same lines as "Don't step on the gas too far or you are beating on your car" I say, "Sure whatever you say grandma" and I smoke the tires. I beat the piddly out of my car every day, and it never breaks. I have 300,000 on my 4G63 Mitsubishi engine. I consider it "Performance testing" if something breaks, it must have been ready to break anyway, that's my take on it. This way I can take it on a 2000 mile trip (driving mellow), and be confident that if it was going to break, it would have broken when I was near home beating it silly.

On second thought Lab does have a valid point. If you have low oil pressure during hot idling, don't do that too often.

Answer 3

Once the car is warmed up and you got good oil pressure it shouldnt be a problem. What would kill the turbo though is when you do this and then suddenly kill the engine. Oil pressure will suddenly drop while your turbine is spinning is really bad. You can damage the turbo assembly. Instead, allow the engine to idle for a couple of minutes to cool down the turbo and allow the turbine to slow down before turning off the engine.

Answer 4

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