Gtr2530kai?

[nsta]

These kits you can still buy brand new, and i was told they are better than the old 2530's, was wondering if anyone has slapped one in their r33 gtst rb25det, and what the power response is like, im thinking either this, or a gt-rs turbo. since i dont wnt any lag at all

[paulr33]

GTR 2530 is not the same as GTST single 2530

different flange, compressor and wheel / housing options so wont be suitable

[nsta]

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

[EVL-R33]

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 November 26, 2007 by EVL-R33

[Simon-S14]

Kai just means newer version in japan

[discopotato03]

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 .

[EVL-R33]

Kai just means newer version in japan

This is correct, it means newer version in jap

[limpus]

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 November 27, 2007 by limpus

[r32sky_line]

2871r is most effecient at 18 - 22psi

[Gts-t]

For what its worth, i had my T3 Flange HKS 2530 before the kai versions came out

[bryyy]

Anyone got results on an rb20det?

[Gts-t]

213rwkw at 17psi on stock inj (yes im naughty)

[swanny180]

I had a 2530 in my 180, and I was very impressed with the response on an SR, amount of lag seemed very acceptable.

Can only imagine it being even better on an RB