Lithium

Is that referred to me or the GT30 question? I've been searching on GT2540Rs and not been able to find anything

Has anyone tried what HPIAB sell as a "GT28" or the Garrett GT25/40R turbo, or have any thoughts on them? I have been seriously thinking of getting one of those with a .86a/r turbine side with a T3 flange from ATP-Turbo in the US (US$1070) as it seems like a really good value for money (and not to mention cool looking) turbo which I figure would be good for my 250rwkw target with reasonable delivery.

Am I the only person reading this who thinks its a bit lame buying a car just to beat someone?? If you do that, you are destined for disappointment - there is always a biggest fish. Get something ywhich makes you happy, you'll always be the winner at the end of the day if you take it for a drive and don't want to stop.

Interestingly enough I was talking with someone recently about GT28Rs on an RB26 - and they reckoned that unless you go a large turbine a/r (and therefore a pretty laggy twin setup) they are quite "surgey" turbos as a twin turbo configuration. If you are running ~.64 turbine a/r, then what he was telling me is true...

Thats interesting, someone I know insists to me that the "smaller" a/r turbine housing on the GT2871R (.64 or something?!) is susceptable to compressor surge - and is overall too restrictive for an RB25. I'd be all keen for a 2871R, IF it is able to supply up to around 250rwkw on my RB25DET - do you think that would be a realistic hope?

I thought the "Disco Potato" is more like a parallel of the GT2530 in terms of general performance/air flow? If I wanted GT2835-type performance from a Garrett turbo, I'd probably go a GT3071R. You can get one of those in T3 flange, but need to sort out the wastegate control additionally.

That sounds like a relatively normal day - if not a little under average Where abouts in NZ are you? If you are in Auckland, try and make it to one of the drag meets - we have quite a few nasty (or cars which I get the impression are a little more hard to come by in Oz) Japanese cars racing at Champion Dragway... not far from there. Our rotaries are quite average compared to yours - but we have a rich mixture

Ahh ok - wouldn't an equivalent spec TD05 cost similar to a T3, if not cheaper?

There is some kind of Mitsubishi (maybe Trust???) TD06 based turbo for sale on the New Zealand Trademe website which is internally gated and has a T3 flange, and a dump pipe which was bolted on to an RB25DET that I I have been keeping an eye on. It appears the seller may not be aware of what it is....

Hey man - why not have a look at a pair of TD04s? AFAIK they are the same flange pattern as TD05s and they are a dime a dozen here in New Zealand because of people with GSR Lancers upgrading from them to TD05s or bigger. A pair of TD04s leaned on should be able to make around 300awkw and should be pretty tractable as well.

I am pretty sure my S2 Turbo was a Hitachi one...

Holy crap - very impressive, well done!!

I'd take the RZ, no questions. Better motor, better brakes, better handling. I own an R33, but thats due to bang for buck.

Whats the most power anyone has made @ wheels using an R33 turbo? I'm not looking for theoretical ones, because I know what they can conceptually reach - I mean actual dyno'd results. Please specify supporting mods, boost level, and engine it was on . Might settle a debate with someone who is convinced RB20DETs make at least as much power at the same boost level as an RB25DET when running the same turbo.

The least I ever managed to get mine to was 7psi (the R33 electronic boost solenoid raised it to just under 9psi at 4500rpm). Not 100% relevant anyway, I want to know if it'd be safe like this

So - who votes it'd be safe to run a GT-RS on the stock fuel system with an R33 actuator?? What about a 2530Kai or 2535?

Reedy - thats because of the actuator that HKS supply with it. As I said before, I I'd like to run an R33 one on it - which is sprung to around 7psi. That way, in theory - the minimum I'd be able to run would now be 7-8psi

On 7psi? Damn Though that is kinda good as well..... cheers!

Sweet cheers. I have to buy a new turbo anyway, but can't afford to do the clutch, AFM, PFC, injectors and pump, FMIC and GT-RS all in one shot. Does it sound silly if I get what I can afford (basically everything but the AFM, injectors and pump) and use an R33 actuator on the GT-RS to keep boost right down just to get the car on the road, even though it won't be all that special until I can afford the fuel etc upgrades? As it is at the moment I don't have a running car (other one was written off) so the fact it won't be running anywhere near potential won't bother me.

It'll probably raise the boost level - so yeah Robo's - Do you know if you can use your R33 actuator on the HKS GT2530?

What I had hoped I'd be able to get away with is getting a decent fuel pump , a PFC, FMIC and a GT-RS kit and get it tuned on the minimum boost setting - is it fair to say that even if I wanted to run the "minimum" I'd still need the bigger injectors?

On WWW.HKS-POWER.CO.JP (warning... in japanese) you can go to the turbos menu, and there is a section called "RB20-25" or something like that, which has a section on the GT-RS and GT2530Kai kits for R32 and R33 GTSt Skylines. It shows boost plots and dyno plots comparing between a stock R33 turbo and a GTRS or GT2530Kai to get an idea of comparative power/torque/spool performance. The GT-RS at least on paper looks SLIGHTLY laggier than the R33 turbo, maybe ~300-400rpm later at most to reach the same boost level on an Rb25. The 2530Kai looks like its better right through the rev range than the R33 turbo. From what I've seen around the place, the 2530Kai looks like what I'd consider the perfect turbo for a "street tune" R32 GTSt with an RB20DET. Slightly better down low, and much better up high and with higher boost levels than the R33 unit. I'm just looking for what realistcally I'd have to expect in terms of set up and general driving with one I have no doubt I'll like the full throttle performance of a GT-RS.

Awesome - thanks a lot That pretty much covers what I was looking for. So it drives fairly well like a pretty standard R33 when not giving it some??

Hi I know at least a couple of people have HKS GT-RS turbos on their R33 Skylines, and have seen some dyno results from people using them - but there are a couple of questions which have I've had that I haven't found answered yet: What boost level is the actuator that comes with the turbo set to? Do people use the factory fuel system - or upgrade the pump? Injectors? What kind of 1/4 mile times have people with them on R33s achieved? Any input would be appreciated Cheers

Nice - that cleared a few things up for me as well, thanks