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HKS GT-RS turbo on RB25DET?

4DOOR

By 4DOOR,
in Engines & Forced Induction

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4DOOR Apprentice

4DOOR

Posted
Posted

Hey guys. I am currently looking at upgrading my turbo to a HKS GT-RS or GT2530 KAI and I would like some advice on the upgrade. I own a manual R33 Skyline sedan and basically I am after an internal gated turbo as I want the car to be perfectly streetable and insurable but I want it to be fast at the same time. Other things I will upgrade with the turbo are AFM, ECU (Power FC), clutch, injectors, fuel pump etc. The car already has a cat-back exhaust and HKS FMIC so hopefully I don't need to replace those things. I would like to know which turbo would best be suited to my application and the advantages and disadvantages of each. Any other information is greatly appreciated and please forgive my ignorance on this subject :confused:

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paulr33 Grand Master

paulr33

Posted
Posted

should be plently of info in the rb25 dyno upgrade thread, should be stickied at the top or in the forced induction reference thread. change the stock dump as it will be a restriction. the gt-rs will flow more and should get you near 260/270rwkw based on some of the graphs from the rb25 dyno upgrade thread. the 2530 kai havent seen any graphs or runs from anyone running these yet, probably silighty more than 2530 but less than 2535 at a guess?

check out the rb25 dyno upgrade thread. the mods youve listed should do you fine. maybe consider a set of cams, should do wonders when you have a bigger a/r turbo

SAMFISHER Enthusiast

SAMFISHER

Posted
Posted

Check the HKS website for details

HKS achieved 290kw and 465Nm at the engine with GT-RS on a RB25 stagea

,268kw and 450Nm with GT2530-KAI in the same set up.

Both made peak power at about 6500 rpm and peak torque at 5000 rpm.

As the GT-RS kit only costs two or three hundred dollars more, this may be the best way too go.

More power with a slight loss of response but will save you from wondering "what if?" which could happen if you went with the smaller turbo.

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