Jump to content
SAU Community

Gtr2530kai?

nsta

By nsta,
in Engines & Forced Induction

 Share

Recommended Posts

nsta Mentor

nsta

Posted
  • Author
Posted

so the kai is for the gtr's?? i want the most responsive turbo i can get for my rb25 for street, that will run me in the mid 12's, ive heard something as small as a gt2535 could fit the bill?, but would the gt-rs be a better option?

is this a good turbo?

http://www.trademe.co.nz/Trade-Me-Motors/C...n-128263102.htm

Link to comment
https://www.sau.com.au/forums/topic/195302-gtr2530kai/#findComment-3498525
Share on other sites
EVL-R33 Proficient

EVL-R33

Posted
Posted (edited)
so the kai is for the gtr's?? i want the most responsive turbo i can get for my rb25 for street, that will run me in the mid 12's, ive heard something as small as a gt2535 could fit the bill?, but would the gt-rs be a better option?

is this a good turbo?

http://www.trademe.co.nz/Trade-Me-Motors/C...n-128263102.htm

No, the 2530 KAI is not just for the GTRs, i got one on my RB25DET and im making 230rwkw @ 20psi with it.. Now im thinking of purchasing a GT-RS for more power..

With the 2530kai you will get great mid range power and they are very responsive..

Edited by EVL-R33
Link to comment
https://www.sau.com.au/forums/topic/195302-gtr2530kai/#findComment-3498626
Share on other sites
discopotato03 Grand Master

discopotato03

Posted
Posted

From what I've seen all the "KAI" bit means is that a 2530KAI has housings to suit an RB series six cylinder .

By far most GT25/28 series BB turbos use a GT28 turbine housing (meaning a T28 flanged one) . The HKS is the wild card being a T3 flanged GT28 turbine housing intended specifically for RB20's and 25's .

The reason I know the guts are the same is that the cartridge numbers are all the same - 446179-21 or -5021 .

The turbo assembly part numbers I have are 472560-4 and 472560-11 . There are only three variations I'm aware of being SR/CA type , RB20/25 type , RB26 type . Their housings are unique to the intended engines layout .

If you look at HKS's (Garretts actually) GT-RS all they are is a Garrett cartridge with HKS's model specific housings bolted on .

If you buy a GT-RS specifically for an RB20/25 you'll get a port shrouded compressor housing on it , HKS obviously found out that using a compressor of that size with a reasonably small A/R turbine housing would drive its compressor into surge on an RB20/25 .

If you buy a GT2871R 52T from Garrett (same cartridge/wheels) you'll get a T28 flanged turbine housing and a non port shrouded compressor housing because its intended for an SR20 . So basically the RB version is in effect a "KAI" .

Mount flange aside you may so what ? Well the difference is that an SR20 has ~ 500cc pots and its cylinders are phased 180 deg apart . An RB six has either 330cc pots (RB20) or 410 cc pots (RB25) and their cylinders are phased 120 deg apart . Basically a 2-2.5L six is more likely to drive a GT28 based turbo into surge with a bigish compressor . Unlike Garrett HKS only do one turbine housing A/R size - 0.64 , Garrett do 0.64 and 0.86 A/R ratios but only in T28 flange .

Cheers A .

Link to comment
https://www.sau.com.au/forums/topic/195302-gtr2530kai/#findComment-3499145
Share on other sites
limpus Mentor

limpus

Posted
Posted (edited)

This turbo or a gt-rs would be my turbo of choice for a streetable rb25...have seen one on a rb25 make 238rwkw at just under 17psi...with a very fat curve...and it wasn't a happy dyno too...the 2530kai was as responsive as the stockie and its not even boosted high enough yet in my opinion...i'd run these things up to 20-22psi if it were up to me...

Edited by limpus
Link to comment
https://www.sau.com.au/forums/topic/195302-gtr2530kai/#findComment-3499439
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Latest Posts

    • EndZee
      R33 Gts/-t Abs Module Wiring Schematic (not Gt-r)

      By EndZee · Posted

      Brooooo Please send ABS control unit schematic Please! R33 gts25t ABS (Its two plug ecu, black and white) wire colors possible? [email protected]
    • GTSBoy
      Boost cut after swap(RB25DET NEO) R34

      By GTSBoy · Posted

      Don't even try to run it on the stock ECU if you're going to have the boost controller bring boost above ~10 psi. I've already told you that. If you use the Nistune ECU, you will need to CAREFULLY read the available documentation for Neo tuning, and read some threads on the Nistune forums, to discover the various things you have to do to prevent the ECU from going bananas when the boost is too high. The is a table associated with th boost sensor that must be modified to prevent it from shitting the bed. This is just one of the things that you will need to do to the tune in Nistune, because the Neo turbo ECU will be expecting to see a number of things (such as the TCS) that are not there, and you have to block the DTCs on those. It is totally not surprising to me that you are having the problems that you are, but the solutions to these problems have been known for >15 years. So just get it done.
    • dyl33
      VOLK RACING GTC CENTRE CAPS

      By dyl33 · Posted

      Centre caps $250
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      Hi. Sry iam not a mechanic and iam not at the car atm so i dont know 100% but they told they measure those and even try to change those. AFM they have two. Coils are new a they have my old one too. Plugs too. ECU...we have 25 NEO stock and Nistune 25 NEO.   But i dont know if any one those could be the problem and why/if/what can cause this, Only thing they did not check is fuel...but that walbro 255 is new(like 1,5 years)... That fuel pressure gauge idk...but i let them know Any suggestions?   EDIT: how can they know if it is like you say he ECU pull power when it reaches a specific boost level that is too high? Tha car has boost controler
    • Duncan
      Boost cut after swap(RB25DET NEO) R34

      By Duncan · Posted

      Can you clarify what you mean by boost cut, do you mean it misfires both when under load (driving) and when stationary and out of gear? Or does the ECU pull power when it reaches a specific boost level that is too high (boost control issue)? Does it occur at idle with no throttle? When you say "the ECU is OK", what ECU is it and why do you think it is OK? Have you used the NEO ECU, and if so do you have a MAP sensor attached? Same for the AFM, why do you think it is OK? Do you have any way to put a fuel pressure gauge on it (even just a mechanical one between the fuel filter and fuel rail)?
×
×
  • Create New...