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Low Mount Rb25 Gt30 Set Up

Greg_r32

By Greg_r32,
in Engines & Forced Induction

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Greg_r32 Collaborator

Greg_r32

Posted
Posted (edited)

Hey Guys,

Looking at running a low mount set up I have the following:

Ported and flowed rb25 manifold

R32 gtst ecu with nistune chip

Wal bro pump

Planning on getting:

Gt3076r

Nismo 555cc injectors

HKS evc-s boost controller

Is there anything else I'll need?

Will any modification be needed to run the gt30 on stock manifold? Also what flange is the stock manifold? And can an external gate be run on a low mount set up?

Finally, roughly how much power do you think it will see me?

Edited by Greg_r32
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https://www.sau.com.au/forums/topic/445842-low-mount-rb25-gt30-set-up/
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boostn0199 Grand Master

boostn0199

Posted
Posted

Hey Guys,

Looking at running a low mount set up I have the following:

Ported and flowed rb25 manifold

R32 gtst ecu with nistune chip

Wal bro pump

Planning on getting:

Gt3076r

Nismo 555cc injectors

HKS evc-s boost controller

Is there anything else I'll need?

Will any modification be needed to run the gt30 on stock manifold? Also what flange is the stock manifold? And can an external gate be run on a low mount set up?

Finally, roughly how much power do you think it will see me?

If running internal gate then no mods besides the spacer plate between manifold and turbo and longer studs. If u want ext gate then need to either mod turbo housing or manifold.

Powerwise around 280-300 on 98 and 320-350 on e85.

GTSBoy Grand Master

GTSBoy

Posted
Posted

Z32 AFM. Since you're buying injectors, don't waste your money on old tech. Buy new EV14s - preferably E85 rated ones.

Turbo flange is T3.

Good luck getting an external gate mounted on housing in stock location. It's a bit squeezy down there. Budget on internal gate for a low mount if using the stock manifold.

Ben C34 Grand Master

Ben C34

Posted
Posted

This isn't hard and has been done a zillion times.

Disco has a thread recently about putting a 3076 on stock manifold.

Heaps of gates off housings around.

Buy turbo. Buy 20 mm spacer.

Bolt together.

Buy 90 degree silicon joiner or alternatively weld elbow onto turbo outlet

Buy decent injectors and z32.

Boost off into the sunset.

  • Like 2
discopotato03 Grand Master

discopotato03

Posted
Posted

Manifold spacer/longer studs/Scotty inlet tube/GT30 IW Dump/elbow off comp housing (stainless mandrel or aluminium bend in 2") water and oil lines .

I'd stay RIGHT away from Nismo 550 side feeds . Soon I'll have a set of 740s in the rail for RB25 if interested .

Or convert to EV14s as mentioned with an aftermarket rail .

A .

discopotato03 Grand Master

discopotato03

Posted
Posted (edited)

Has not been back on the rollers yet , on E85 it would be disappointing to see less than 300 given the overall package .

If using a std or Z32 MAF consider keeping the factory airbox and snorkel because it goes a long way to hiding the front 2/3 of the turbo . Scotty inlet or one like it is a must here . Pods scream modified

A .

Edited by discopotato03
Kinkstaah Grand Master

Kinkstaah

Posted
Posted

I've made just over 400RWKW with a GTX3076R on E85, off the stock manifold with a WG welded to the turbine housing.

I actually made 377kw, but it was through an auto which had 8% slip. Some crazy mofos have made up to 455rwkw on one, but uh, at 45PSI. I don't think that is really going to work too well in a stock engine setup, especially if you don't have a GTX and have a GT3076 instead.

Also +1 for getting injectors well, well, well above 555's. You never know when you will need them and the cost difference is almost zero.

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