Decide on a Turbo!!

[Roy]

how is a HKS T300S turbine? any good? never head of one..

In 1996 HKS were using twin T300s on their drag 180SX which ran an RB26, with these turbos the engine was rated at 860ps.

So i cant give you the exact numbers/details, but i imagine the turbo is rated about 380-400hp, and most likley an oil cooled, 360deg thrust bearing turbo.

[groove32]

cool. so its a older turbo then the gt2535?

[Roy]

Yeh its sure to be older then the HKS turbos based on the Garret GT range of ball bearing turbos. (IE GT2510, GT2530, GT2535 GT2540, GT2540R)

Im guessing it has a similar power rating to the HKS GT2540 (????only a guess based on the hp of RB26s used as HKS promo cars)

[groove32]

i forgot about the gt2540.. maybe i should go for that...

like i said before i want around 220rwkw, some say that the gt2535 is the perfect turbo but others are saying it has no top end... would u know?

thanks

[neil_se]

the 2530 will be a lot easier to get hold of than the 2535. maybe you're thinking of the 2835 which would get you 240-250rwkw at a guess but more lag too.

[groove32]

how much more laggy would it be? what rpm would it kick in compared to the gt2530?

thanls

[RS500]

dude(groove32),

i already mentioned the HKS GT2540 to you.

HKS rate them at 350ps, and state a power level of 250kw (340ps) at the engine on 1bar on an RB25DET. see below

http://www.hks-power.co.jp/products/turbo/...c_gt/ac_gt.html

Turbo Tits,

you should refer to the link above also, as HKS officically state that the GT2535 (also on a RB25DET) makes 240kw (327ps) at the engine, so i don't think it will have the 'minerals' to make 220rwkw on an RB20DET with 1-1.2bar of boost, even if at all.

[SLY33]

rs500 this argument has been battled by Rev210 vs many! i dont know how the rated engine figure to rwkw figure on a chasis dyno works, but the rwkw figures quoted for the RB20/25's over here running these little HKS's are correct.

its well known that a stock turbo can make ~200rwkw (roughly 280hp), yet isnt this turbo only rated to 300hp? so technically with drivetrain loss, it cant make 200rwkw, but it does. It could be the chassis dyno's readings or how they measure power. I dont know, i dont think an absolute answer was given the last time we all argued this point about turbo's rated power vs rwkw's!

[SLY33]

groove 32, if you have the stock turbo now, get a 2530 and you will be happy! You can rest assured you wont have a response problem with this turbo, and it is capable of making the rwkw that you want.

[Steve]

2530 is killer on an RB20.

the other thing with just quoting peak figures is it doenst say anything about reponse or powerband. I have never heard of anyone speak well of the HKS2540 on GTS, ie in twin from, except if you are after a pure drag application. I have read road tests (well dyno acutally) and that said the same thing, very laggy, very narrow power band without winding the rev limit hard to the right - that was on a SR20.

On the other hand, I have never heard anyone say anything bad about 2530 - and I have been in a 2530 powered RB20, and it performs really well low and midrange with a decent top end. Lag was barely noticeable compared to the stock turbo.

[makaveli]

what about the 2835 i was thinkin bout that for my car in the future.

wen would it be likely to make full boost by?

thanks

Mark

[groove32]

ok.. ok..

but will the top end power of the gt2530 be more then the stock rb20 turbo? (what ever it is)?

[groove32]

i can get my hands on a cheap :

t3/t4e .48t/h .50c/h 57 trim clipped.dry

how does that sound and compare??

[SLY33]

groove 32, the 2530 will have MUCH MORE top end than the stock rb20 turbo, so dont worry about that!

[Roy]

What does "clipped dry" mean, back cut exhaust wheel???

[groove32]

What does "clipped dry" mean, back cut exhaust wheel???

to be honest i'm not to sure.... i'll try and fin out..