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Help To Choose Turbo..

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nissan200sx.dk Community Regular

nissan200sx.dk

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Hi all.

I'm looking for a turbo for my RB30DET project. My goal is 800 - 850hk on boost, and another 100 - 150hk NOS shot on the 1/4 mile track. (Flywheel HK)

Have 2 garretts and one tubonetics in mind.

GT4094R

GT4294R

Or the new GTK 850hk turbo.

8000 rpms limit, high lift cams etc etc..

Which turbo would be my be my best bet? Want as early spool as possible, but still within my goals

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https://www.sau.com.au/forums/topic/263268-help-to-choose-turbo/
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Beer Baron Grand Master

Beer Baron

Posted
Posted
Whats "hk"?

A to4z will do 800hp if you get the rear housing correct. Cheap, easily available, heaps of parts made to suite - its a pinless procedure :bunny:

hk is horse kower. but I want to know what parts to suite are and how the procedure is pinless? where do the pins normally go in this suite? :down:

nissan200sx.dk Community Regular

nissan200sx.dk

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Hk is Hp.. Will use HP form now on. hehe.

Have searched, but cant find conclusive info. Especially on the GT-K series.

Im leaning towards the GT4294R, in a 1.01 trim.. How do you think that will boost on the 3 liter? I have seen the GT4294r compared to a HKS t51 kai unit? Is that correct?

N1GTR Grand Master

N1GTR

Posted
Posted

If you want the results of those turbos on 3L motors, have a look on www.supraforums.com www.supraforums.com.au and www.mkiv.com. They've got all the results of turbo vs turbo on 3L based motors albeit 2JZ's instead of RB's :down:

Lithium Grand Master

Lithium

Posted
Posted

I'd lean to a GT4294R for that power level if I were doing it. The GTK turbos I've heard references to being fairly laggy compared to a lot of the other turbos on the market but are probably tough as anything.

nissan200sx.dk Community Regular

nissan200sx.dk

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I am also leaning towards a GT4294R.. In one of the smaller trims. 1.01 is the one I'm looking the most at.

In the supra forums I cant seem to find that much info on gt4294r.. its either gt4088r they talk about, or waaay bigger (GT45) than my goals. Or HKS.

Lithium Grand Master

Lithium

Posted
Posted

I think especially talking to people who have gone that crazy, the consensus seems to be that once you are heading for something more drag orientated and if its moving well out of the range of full on street friendly turbos such as the GT3582R and at most the T04Z (on a 3litre) then its best just be accepted you won't be getting much boost pulling from low revs etc you may as well just go for something silly as if you've got bored with 600hp, whats going to stop you getting bored with 800 after a while.

Thats not necessarily my opinion, but I know people who have been there and done that and they tend to feel that way. The GT4294R is a reasonably proven turbo, the GT4094R is marketed to be fantastic but I'm still not 100% sure on it - I've seen contrasting views on them and while they seem that they could be good I don't think they fit into the proved group, hence why I'd go for a GT42R as there are plenty who have made that kind of power with them and on a 3litre it shouldn't be too bad. There were quite a few around a few years ago that had GT4294Rs I think, just pretty sure they went up to GT4202R or bigger. If you want just around the 800hp mark then a GT4094R should get you there and may be a bit more lively under foot on the road - though the impressions I get is they still have the "large turbo" feel about them.

nissan200sx.dk Community Regular

nissan200sx.dk

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Hi.

Thanks for the replys. :-) I dont care if i need to be over, say 4500 rpms to get some action.

Arrrg its tough to deside.

The rule "get as small a turbo that will meet my demands" is in my mind.. And 800hk is the goal. So maybe I should just try out the GT4094R.. ? The maps for a GT4094R looks like they fit my goal.

The car should be more track day oriented than drag oriented... But its all how you define each? Monday I will try and call the shop were i usually by my turbos, and have talk with them. Monday the turbo will be bought.

The turbonetics GT-K series I have crossed out now.

So the finalist are GT4094R, or the GT4294R. And if using the rule "get the smallest turbo that fit the goal" applies then it should be a GT4094R.

What do you recon?

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