High Flow Turbo Vs Stock Turbo For R-33 Gts-t

[Harey]

the standard GTST turbocharger is a ball bearing, oil cooled, water cooled unit which is fantastic off the bat

I thought the standard GTST turbocharger was plain bearing not ball bearing??

[Harey]

hmmm, maybe i need to do some further investigation... what other signs should i be looking for that it has been hiflowed? how can i determine if it is inconel?

tony -thought the stock impellors were stainless anyway? cheers

The stock impeller is ceramic. This is why there are so many stories of the standard turbo dying. Imo half the reason for a high flow is that you end up with a stronger more heat resistant turbo.

[daniel23a]

sorry, yes i misinterpreted tony, i thought he was talking about the cold side, just realised he was referring to the fact that stainless is not magnetic. anyone know how i can determine if the exhaust wheel is stainless or ceramic? regards, Daniel

[paulr33]

std unit is ball bearing, oil cooled, water cooled, plastic compressor wheel (s1 R33) or nylon compressor wheel (s2 R33) and cermamic exhaust wheel

typically made by hitachi

[wlspn]

Are you sure the standard GTST turbo is ball-bearing? Was quite confident it wasn't... I know GTR turbos are, but also obviously a completely different unit... A lot of highflows mention that the CHRA is up-graded to a ball-bearing, steel-wheeled setup. But even before that had always thought these weren't ball-bearing

[Birds]

I too was under the impression only the N1 and Jap spec S15 were factory ball bearing...open to new information though.

[PM-R33]

What the hell are you guys on about. The stock RB25 and RB26 turbos are T25 journal bearing. The R34 N1 RB26 used Garret GT25 ball bearing units.

Why are we suddenly questioning this, i thought this was common knowledge on here?

Edited March 3, 2010 by PM-R33

[paulr33]

i thought they were all ball bearing

[XR Pilot]

my mate not too long ago took of my rocker covers and painted them and noticed the throttle housing was putrid so he cleaned it all and took off the plenum also cause it was dirty and he put it back together and the difference was the car was revving at 1200rpm instead of 850rpm where it normally was.

could that have anything to do with it?

Sounds like you have a vacuum leak which could cause the problems you describe. Listen for a noise of air sucking at idle. Also how could it be from not too long ago as reading some of your previous posts your mate painted the rocker covers back in December 2008 and you've still got the same problem as back then. Might be time to fix it properly hey..