High Flow Rb25 Turbo Or Hks?

[JordansR32]

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

[LANDSCRIBBLE]

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]

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]

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

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.

[ARTZ]

+1 for hiflow, cheapest easiest option by far..

Just stick to your 230kw goal, don't get carried away cause its all downhill if you do...

[R31Nismoid]

HKS2530, best bang for buck for 210-230rwkw on the RB20. Feed 18psi down it and off you go. Direct bolt on.

A hi-flow RB25 turbo will be laggier in most instances.

[Teitzel]

Get hypergear to highflow the rb25 to the same specs as their atr43 ss1

[JordansR32]

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?

[paulr33]

0.63 is the area/ratio for the housing

its all relative to the turbocharger size

as per what ash said probably 2530 is the best bet

just check the turbo isnt shagged being 2nd hand

[ARTZ]

i missed the bit that said rb20 again...why do I just assume everybody has an rb25

[JordansR32]

Ahk so all turbos will have different ones? Yer i know what u mean, its hard to do that when u buy from ebay and its not local.

Yer its a hard decision, some people say high some say hks haha.

[R31Nismoid]

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

[R31Nismoid]

Have a look through the RB20 dyno thread anyway. You'll soon work out what will suit you best.

[ARTZ]

Yer its a hard decision, some people say high some say hks haha.

HKS always wins

problem is finding one these days...

[hardsteppa]

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.

[R31Nismoid]

And again... RB25... different.

[hardsteppa]

ahh..20 not 25, of course...

ps my turbos are still for sale lol

[JordansR32]

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]

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 July 29, 2012 by petero'nell

[toffy]

Get the standard 20 turbo high flowed , personally , if i were to start again with all the cash I've wasted , i would have this done