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Turbo For Rb25/30

megzz

By megzz,
in Engines & Forced Induction

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megzz Collaborator

megzz

Posted
Posted

Hey Guys,

I spoke with Stao from Hypergear for a turbo for my fairly stock RB30/25 and he sold me the ATR43 G2 with an .82 rear housing. So I went with it but after pulling the stock rb25 turbo, I am wondering i am going to get worth while gains.I see a lot of people putting ATR43 G3 on stock RB25's (with supporting mods). Am wondering if I am wasting my time fitting this turbo and should I be going for a G3?

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https://www.sau.com.au/forums/topic/388982-turbo-for-rb2530/
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JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

GT30 on an RB30 would be quite fun. It would probly spool like a stock rb25 turbo on an rb25, but make power hehe.

Would the GT30 be a little on the small side though?

not quiet the same. stock 25 usually makes 12 odd psi by around 2500rpm i think. gt3076 on a 30det usually makes 1 bar by around 3500rpm. i wouldnt go any bigger for a street car

gotRICE? Veteran

gotRICE?

Posted
Posted

not quiet the same. stock 25 usually makes 12 odd psi by around 2500rpm i think. gt3076 on a 30det usually makes 1 bar by around 3500rpm. i wouldnt go any bigger for a street car

Wow that sucks. My GT30 makes 17psi earlier than that on a 25. lol

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

GT30 on an RB30 would be quite fun. It would probly spool like a stock rb25 turbo on an rb25, but make power hehe.

Would the GT30 be a little on the small side though?

Go have a look @ the graph and see for yourself then :D

I cannot remember exactly, but its up and on early as!

Does taper off upper RPM, but that's to be expected as its making 330rwkw on PULP which is pretty much limits met

Dale FZ1 Veteran

Dale FZ1

Posted
Posted

GT30 on an RB30 would be quite fun. It would probly spool like a stock rb25 turbo on an rb25, but make power hehe.

That is a pretty accurate description of what to expect. Cubic capacity gives a lot more torque at idle, turbo lights up early, and can blow hard to make a lot of stick. For road use the 0.82 housing is very good match, maybe a bit restrictive if you want to run for extended periods at high rpm ie. on the track. The GT3037 might be a superceded unit but it is a good thing.

joeyjoejoejuniorshabadoo Grand Master

joeyjoejoejuniorshabadoo

Posted
Posted

i have driven al's car and I can tell you it is the most fun RB setup i have ever driven....

power everywhere! boost from like 2400 revs and just frys the tyres in any gear at any time.

I have a car that makes the same power as al's car (330 rwkw) out of a 25 and it's just a whole different ballgame. i wouldn't go any smaller.... but it's 1 KILLER setup

TiTAN Grand Master

TiTAN

Posted
Posted

not quiet the same. stock 25 usually makes 12 odd psi by around 2500rpm i think. gt3076 on a 30det usually makes 1 bar by around 3500rpm. i wouldnt go any bigger for a street car

my GT35 on my 3L is that responsive, try 2500-3000 for a GT30

gotRICE? Veteran

gotRICE?

Posted
Posted

turbo not too small,

25/30, 330rwkw, 3076R.82 rear (atrG3 equiv)

Yeah i never meant it was too small as in the way the car drives, more like how the stock rb25 turbo is too small for that engine.

A .82 on an RB30 is awesome for drags and lurking on the street but i feel like the .82 would get a bit warm if you wanted to race it at full noise all the time. :)

That was a wicked launch. Hehe.

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