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What Turbo?

zac320

By zac320,
in Engines & Forced Induction

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zac320 Enthusiast

zac320

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I have a Nissan GQ rb25/30 it's been rebuilt only with cast pistons and standard rods. I am chasing a new turbo so I can get some power from this motor. Also what injectors should I look at? The ones on there heaps of the plastic tips on the end of the injector have snapped off.

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KiwiRS4T Grand Master

KiwiRS4T

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Have a read of the RB30 turbo results thread and see what people make with the different turbos.

If you already have an RB25 turbo you could consider getting it rebuilt by Hypergear, or you could get a GT3076 or read the Precision thread.

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zac320 Enthusiast

zac320

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I just thought because its a 4wd it will be a whole different ball game. I have a stock turbo but I've heard the ceramic wheels are break past 14psi. The motors been fully rebuilt and I'm aiming for reliability as well as power. I plan on keeping the car

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KiwiRS4T Grand Master

KiwiRS4T

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I just thought because its a 4wd it will be a whole different ball game. I have a stock turbo but I've heard the ceramic wheels are break past 14psi. The motors been fully rebuilt and I'm aiming for reliability as well as power. I plan on keeping the car

If Hypergear rebuild the stock turbo I presume (you can check) that they will use all steel wheels. If you want a brand new turbo the GT3076 would suit for 250 - 300kw.

There are a few sidemount injectors you could get -about 500-600 should do you. I have Deatschwerks 550 on mine.

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zac320 Enthusiast

zac320

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Well don't have exact specs in hand, but heads been fully rebuilt so has motor just with stock rods and cast pistons. Would love around 250rwkw, is this realistic in a 2ton car without stressing things to much? Thanks

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vh45tt Contributor

vh45tt

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i think 250kw@the wheels will prob not go for too long with cast pistons and standard rods, but you can get a reliable 200-220kw out of it, i have a vipec ecu for sale 1000 bucks they are fantastic. and a t3/t4 600 dollar ebay turbo which ive personally used on my own cars and customers cars and on my 25 and 16psi made 234rwkw. so you dont have to spend lots of cash to get the result you need,

regards

drews performance

0422973210

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zac320 Enthusiast

zac320

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Okay we will go with 200rwkw. With that ecu mate will it have the tuning capabilities to pass an emissions test? The car was last registered as a RD28TD. The RB30 bolts straight up, gearbox and engine mounts. But ive been told it will need to pass an emissions test, because the motor is older than the car. Plus the engine will need to be engineered.

Cheers

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zac320 Enthusiast

zac320

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Ive had a look around and im starting to get nervous to whether i can engineer this. Im thinking i should keep standard turbo and standard injectors for now and go aftermarket ecu so i pass emissions test?

ALSO I KEEP SEEING $3000 FOR AN EMISSION TEST?!

Edited by zac320
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Mick_o Grand Master

Mick_o

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The vipecs are a great unit from what I've read I'm running a link G4 which is basically the same thing and my car runs better than it ever did with a nistune ecu. A fresh 30/25 should piss 250kw in safely! Just depends on the tune! I'm smashing 25psi boost down my stock 25's neck and making 336kw at the wheels and have done safely for the last near 2 years now. If you are only chasing 250kw just go for a hypergear or gcg highflow turbo as they are cheap,reliable and proven performers. Personally I don't think the kind of Ecu u run is Gunna affect emmissions it all boils down to your exhaust and tune Steer clear of ebay junk turbos as they are generally laggy and unreliable for the extra $$$ use a tried true performer that ain't Gunna risk ya freshly built motor. Just my 2c anyway

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zac320 Enthusiast

zac320

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Another post but I've tried searching.

I've looked up automotive engineers in vic and found lots of people but I don't know if they are actually engineers.

Can anyone give me some numbers?

I've searched around and I Dnt think I will be able to engineer the car.

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KiwiRS4T Grand Master

KiwiRS4T

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Another post but I've tried searching.

I've looked up automotive engineers in vic and found lots of people but I don't know if they are actually engineers.

Can anyone give me some numbers?

I've searched around and I Dnt think I will be able to engineer the car.

In NZ there is a website with authorised certifiers. You could try working backwards by asking the relevant authority (transport department - whatever it is called over your way [VicRoads evidently] and ask if they have a list of people authorised to "engineer" mods.

This may be what you need - if you look on this page there is a pdf listing VASS signatories - give your nearest one a ring and tell him what you want and he should be able to tell you if he is the person you should be referring to:

http://www.vicroads....atoryScheme.htm

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zac320 Enthusiast

zac320

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Hello. Here's an update. Rang the closet place. He said the conversion is easy to engineer. But the car will need to pass emmisions, that's the biggest problem. He said vipac do it and it's about $1000.

I've looked on the net and everywhere it says u can't engineer a rb30/25? This is so confusing! The car is a 1995. The rb30s where in patrols up until 1997. And the 25head is around 91-93. What is your input on this people? I've hit a brick wall

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