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High Flow Rb25 Turbo Or Hks?

JordansR32

By JordansR32,
in Engines & Forced Induction

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JordansR32 Collaborator

JordansR32

Posted
Posted

Hey everyone, just wanted some people feedback on something, i have a rb20, and are undecided on what turbo to get? Thinking either a hks2530, 2535, or a garret 2860, i heard these are pretty much the same type, or i was thinking of getting a rb25 turbo high flowed, im chassing about the 230kw mark but want it to start making boost early, ill have all the supporting mods, just dunno weather the rb25 turbo will be laggy, hears they can be once there highflowed.

If anyone can give me some advice, or if they have done this, much appreciated guys

Cheers

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LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
Posted

Have you checked out the Hypergear thread? He does highflows and brand new bolt on turbo's, cannot recommend his work enough. If you can get hold of an HKS turbo cheap enough, should get the job done. Just not sure whether or not it will bolt onto your stock exhaust manifold, inlet/outlet pipes, or dump pipe.

JordansR32 Collaborator

JordansR32

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Yer i have seen his website amd read a few things on here aswell? Have u used hos stuff before? Have u got a high flowed turbo that he did? Whats it go like? Spool time and stuff? Yer the hks are really hard to find and usually expensive aswell for a 2nd one. Yer the hks are a 6 bolt housing im pretty sure and ive got a after market dump pipe to fit any 6 bolt rear housing turbo anyway just gotta get the turbo!

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
Posted

Yeah i've got one of his ATR43G3's. 375rwhp on 21-20psi. Kicks in at 4200rpm so it is kind of laggy, but only compared to the measly little plastic/ceramic stock turbo :P

If i were after 230rwkw i would be finding a blown rb25 turbo and getting it highflowed, completely bolt-on, and its the cheaper option.

JordansR32 Collaborator

JordansR32

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  • Author
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Why would the highflowed rb25 turbo be laggy? Coz stock would start making boost pretty early?

Its a hard decision i dunno what to get the hks are really expensive, and getting a rb25 high flowed is kinda like a new turbo, the main thing i dont want it to be laggy! Does anyone know much about when they say .63 or something? Is that ment to have something to do with the rear housing?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Why would the highflowed rb25 turbo be laggy? Coz stock would start making boost pretty early?

Its a hard decision i dunno what to get the hks are really expensive, and getting a rb25 high flowed is kinda like a new turbo, the main thing i dont want it to be laggy! Does anyone know much about when they say .63 or something? Is that ment to have something to do with the rear housing?

The RB25 housing is already larger, hi-flowing will further increase the size. Hence they are 250-290rwkw in hi-flow form... But they always nose over.

The A/R is just a relative size. It varies depending on the turbo and wheels in question... And how much meat is removed during hi-flowing

hardsteppa Grand Master

hardsteppa

Posted
Posted

JordansR32, I just got one of the Hypergear RB25 hiflows last week. It's good, a brand new CHRA fitted to old housings, so really a new turbo. Not running a huge amount of boost through it as I'm on stock ecu, definitely tons more top end though. Not alot of instant response though IMO. From what I have read the HKS GT-RS and Trust TD05H 18G are great punchy turbos for the low 200kw mark? There's a Trust TD05H 18G bolt-on kit on ebay for sale at moment too for $1500. Or *product plug :)* I have my old R33 stock turbo for sale cheap suitable for rebuild, and also an R34 OP6 if you're chasing a bit more from the highflow.

JordansR32 Collaborator

JordansR32

Posted
  • Author
Posted

Yer i think the hks garrett can handle more power and boost, i want to run about 20psi on high boost with a nistune and all the support mods, still tossing up my opions, ill have a look at the dyno results and go from there i think

petero'nell Enthusiast

petero'nell

Posted
Posted (edited)

Get the Hypergears SS1PU. That is a very responsive turbo with a super strong punch.

Wait. just noticed OP ask for a Rb20det turbo lol. For that power check out their high flows and the smaller SS1.

Edited by petero'nell

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