Turbo still spins after motor is off

[R31 POWER]

I've just installed a HKS GT2535 turbo on the good old RB20det and i'm not sure if I have a problem or not.

The turbo works fine and does'nt leak oil whine or anything like that but when the motor turns off the turbo shaft spinning is audiable for about 10sec?

So is this bad?

[Jay95R33]

Nope, this is good !!

It shows you that the bearings are still good and is spinning freely

J

[R31 POWER]

Excellent and such a quick reply

[Jay95R33]

[Merli]

My HKS GT3040 was high mounted and you could CLEARLY hear it still spinning for about 70-80 seconds after your switched the engine off.

[SeriesIIGTST]

Yep, that's normal. My new HKS 2535 turbo is audible for 10-15secs after my engine switches off. It's all good

[R31 POWER]

My HKS GT3040 was high mounted and you could CLEARLY hear it still spinning for about 70-80 seconds after your switched the engine off.

Fark!!

Thanks guys one less thing to worry about.

[B-Man]

My HKS GT3040 was high mounted and you could CLEARLY hear it still spinning for about 70-80 seconds after your switched the engine off.

Same

[RYanR31]

when under the engine bay i can hear my stock turbo slow down for about 7 seconds, is it at this point where the turbo is wearing more because of the oil not circulating while its still spinning or is it the heat that is the issue when turning off the motor?

[bbenny]

yeah my 2530 keeps on spinning too. must be those great GT bearings haha

[R31 POWER]

HAHAHAHAHA you said it bbenny,even at about half throttle it wants to let rip but I can't let it yet coz it's lean up top,PFC will fix that.

RYanR31 I know what your saying,anyone know if thats true?

[SeriesIIGTST]

I'm pretty sure it's a heat issue rather than an oil circulation issue when shutting your car off. If you think about the operation of a turbo timer, it simply lets your car idle for a set amount of time, allowing the bearing in your turbo charger to cool down as there is not load on them causing heat. Shutting off your car and hearing your turbo spool down is simply a good sign that all your bearings are in good shape

I bet you're gonna be loving your 2535 once all your PFC tune is sorted out. It's an awesome turbo on my car! (See sig for power )

[Busky2k]

Damn. The good ol bush bearing units are dead still after a coupla seconds. I want a ball bearing turbo now *sook* haha Bush bearing units have quite a bit of friction I reckon when i was free spinning mine by hand.

[rb20-calais]

lol, at first i thought mine was stuffed, gotta love the hks wind down !

[SKYBEE]

hey all interesting topic this is

this year whilst workin in the dyno cell at the summernats i i was takin fotos of all cars and what not any way the car that one RAPID 8 after i took a few fotos of it just after a run front side in side all that and under the hood come back couple of minutes no shit and the turbos where just slowin to a stop crazy shit that is really makes you think how quick they are spinning i have no idea what size turbos they are but you can stick a nokia shock proof fone in the inlet with atleast 10 to 15 mm above it crazy crazy shit

[Zombie]

/me waits for the N/A "turbo wind down" & electronic bov in one kit

Adam