turbo cooling question
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sy538
New member
Re: turbo cooling question
Most aftermarket/upgraded turbos are not water cooled, only have oil going to them, and there are at least a couple people here that have run stock/20Gs with out water. The only thing to worry about is if you have been running it hard you need to let the engine idle to keep the oil flowing while the turbo cools off before you turn off the engine. As long as you don’t turn it off hot you shouldn’t have any problems.
Most aftermarket/upgraded turbos are not water cooled, only have oil going to them, and there are at least a couple people here that have run stock/20Gs with out water. The only thing to worry about is if you have been running it hard you need to let the engine idle to keep the oil flowing while the turbo cools off before you turn off the engine. As long as you don’t turn it off hot you shouldn’t have any problems.
Tooky
Serious about performance
Re: turbo cooling question
That's really weird that they removed the coolant lines. Maybe the truck had a bigger turbo at some time and then they moved it back to stock but it was a pain to reinstall the turbo coolant lines so they left them off. I agree with what Sy538 said. I guess nobody knows "For certain" but they dont really seem 100% necessary. My guess is OEMs include them to make the turbo life longer for various conditions people beat theirs cars in. A lot of aftermarket turbos don't have water cooled center sections HOWEVER when I ordered my PT51 I custom ordered it WITH a water cooled center just because I beleive the benefits are worth it. It cost me an extra $150 and a huge pain in the ass trying to get fittings to connect for something nobody else was doing. (Ivanko Barbell did it first on his PT-44 but he used a different manner of connection than I did.)
I beleive the water helps cool the turbo altogether and reduces oil temperature and prolongs the turbo life. The turbo in my truck has always been a large source of heat so anything I can do to keep the temps down is worth it to me. :2cents:
That's really weird that they removed the coolant lines. Maybe the truck had a bigger turbo at some time and then they moved it back to stock but it was a pain to reinstall the turbo coolant lines so they left them off. I agree with what Sy538 said. I guess nobody knows "For certain" but they dont really seem 100% necessary. My guess is OEMs include them to make the turbo life longer for various conditions people beat theirs cars in. A lot of aftermarket turbos don't have water cooled center sections HOWEVER when I ordered my PT51 I custom ordered it WITH a water cooled center just because I beleive the benefits are worth it. It cost me an extra $150 and a huge pain in the ass trying to get fittings to connect for something nobody else was doing. (Ivanko Barbell did it first on his PT-44 but he used a different manner of connection than I did.)
I beleive the water helps cool the turbo altogether and reduces oil temperature and prolongs the turbo life. The turbo in my truck has always been a large source of heat so anything I can do to keep the temps down is worth it to me. :2cents:
leadfoot
Member
Re: turbo cooling question
The turbo dodges with I believe Garrett turbos benefitted from both oil and water cooling from the factory. If I had a choice I would do both simply for the benefit of preserving the shaft housing.
Theoretically, all manufacturers recommend a cool down period basically because the shaft is still spinning faster than the idle speed. Meaning, if you let off the gas the turbo doesn't spool down instantaneously with the idle. It is still spinning.
You can rev your engine, kill it, get out of the car and start walking to the house and the shaft is probably still spinning -except without any oil or water cooling.
This is why some people employ the turbo timers...
The turbo dodges with I believe Garrett turbos benefitted from both oil and water cooling from the factory. If I had a choice I would do both simply for the benefit of preserving the shaft housing.
Theoretically, all manufacturers recommend a cool down period basically because the shaft is still spinning faster than the idle speed. Meaning, if you let off the gas the turbo doesn't spool down instantaneously with the idle. It is still spinning.
You can rev your engine, kill it, get out of the car and start walking to the house and the shaft is probably still spinning -except without any oil or water cooling.
This is why some people employ the turbo timers...
jwaller
Evil Genius/SyTy Guru
Re: turbo cooling question
water cooling is a large help AFTER the engine is shut off. it employs flow by heating the water in the center section thus pulling colder water from below. if you look carefully the way the stock system is setup this is it's purpose.
oil keeps it plenty cool during driving but the water cools it after it's shut off.
it is the same principle very old tractors use that have water cooling systems but no water pump.
water cooling is a large help AFTER the engine is shut off. it employs flow by heating the water in the center section thus pulling colder water from below. if you look carefully the way the stock system is setup this is it's purpose.
oil keeps it plenty cool during driving but the water cools it after it's shut off.
it is the same principle very old tractors use that have water cooling systems but no water pump.
