Garrett /HKS GT30 owners - do you use an oil restrictor ?

[B-Man]

There was something there yes - but not 1.2 mm more like 3-4mm - to line up with the original -4 fitting (in the pic)

I know white smoke could be lots of things - but I am troubleshooting from least cost to me forward.

WRT to your comment re HKS turbos being different for different applications - do you mean that I could have an HKS 3040 that was meant for a RB26 or a 1J or a rotor ?? How different can they be ??

Can you tell me someone I can take the car to that will give me a definite answer ? I will pay them - I've talked to lots of people about this and each gives me a different answer.

Cheers,

[ylwgtr2]

any of the ball bearing cores i have ever seen have a restrictor fitted in them from new......this includes 34 ball bearing type turbos

[Merli]

I see, I see... 4mm doesn't sound like a very useful restrictor to have, I understand why you're considering a smaller one.

Understood about cheapest solutions first troubleshooting

I have no idea what the differences are between the different releases, but I know the GT2530 for the RB25 is VERY different to the GT2530 for the RB26... I was just saying that to illustrate the point that if HKS were to goto the trouble of releasing different turbos for different engine applications, perhaps Sydneykid's theory of "one turbo to suit all applications" doesn't apply to HKS's range? Perhaps if HKS were to goto the trouble of releasing different turbos for different engine applications, their turbos might have restricted oil lines to suit each engine application?

Also another thing to consider, is... as far as I know, the N1 oil pump isn't a higher volume oil pump, as compared to a standard GTR oil pump (not sure about the GTS-t standard oil pump). All it is, is a higher pressure pump, but standard flow rates.... So if what I've researched is correct, you shouldn't have any extreme oil flow increases that might warrant restricting oil to the turbo any further?

I'm just throwing ideas around, none of the points I have brought up are concrete, they're just adding food for thought

[DoughBoy]

The CHRA are the same, it's the housings/flanges that are different between the RB26/RB25/SR20 applications in the 25xx + GT-SS/RS range.

[Merli]

The CHRA are the same, it's the housings/flanges that are different between the RB26/RB25/SR20 applications in the 25xx + GT-SS/RS range.

I thought the GT2530 for RB25 had that machined aluminium snout on the intake side?

[Roy]

Hate to state the obvious, byt have you thought about talking to Paul at BD4s, they are the HKS distributer, and build plenty of quick cars...only most of their clients dont typically advertise their power etc etc, but they have amongst others an MR2 running a 3240, an EVO IV running a 3037 etc etc, so have played with plenty of the GT30 based HKS range.

[Merli]

I thought Raymond's MR2 was running a GT3040? That's what he told me when we last spoke? He hasn't gone larger has he?!?!

[Roy]

I was looking at the compressor cover a while ago and i could have sworn it had 3240 on it....i pissed myself laughing and all of a sudden the nitrous bottle made more sense....though the gas wasnt connected, dont know if it is now as i last looked at it before Xmas

[B-Man]

Yeah - it might be obvious Roy - but since I didn't buy anything from BD4's , I didn't think it was appropriate to go asking them questions about stuff - I guess that is the way I am.

Business is Business....

However, if someone is friendly with BD4's and they are happy to help a poor unsuspecting customer - I'll take that

You know what I mean , yeah ??

[WHITE R32]

when i bought my new gt28 440hp i asked specifically when they made the braided oil feed if i needed a restrictor and both the guys at the shop said no in these sort of turbos (meaning garrett gt series i presume??) they have an inbuilt restrictor so suit the application.... but also on the other hand SK's comment about the varying oil pressures in different engines has me thinking.......though mine has been on the car for about 3000km without the slightest puff of smoke or problem with just a braided open line from the factory oil feed in the block to the turbo.......

[Craved]

i would have thought if the turbo was sealed then pressure would be an issue! unless there was too much pressure then the seal would have blown and need replacing!!