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Urgent Gcg Stage 1 Turbo Question

silver gts-t

By silver gts-t,
in Engines & Forced Induction

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Sydneykid Grand Master

Sydneykid

Posted
Posted
what i would like to know is the specs on this turbo

and how it would perform on a rb20 if possible as they told me the r33 and 32 hiflows differ

or even when it hits full boost..??

called GCG and supposedly they didnt know specs!?!?

thanks

We had a GCG ball bearing high flow on an RB20DET (170,000 ks' old), made 225 rwkw at 1.3 bar with 1 bar at 3,000 rpm, no boost drop off till 7,500 rpm, made good power to 8,250 rpm. Highly recommended.

:P cheers :)

CEF11E Veteran

CEF11E

Posted
Posted (edited)

yes but the RB20 and RB25 compressor housings are going to perform differently.

so if you use an RB20 turbo instead of an rb25 to start with you will have boost earlier but peak earlier...

Edited by CEF11E
Sydneykid Grand Master

Sydneykid

Posted
Posted
yes but the RB20 and RB25  compressor housings are going to perform differently.

so if you use an RB20 turbo instead of an rb25 to start with you will have boost earlier but peak earlier...

Correct, but the difference is not dramatic, I don't think it would be more than 250 rpm later to 1 bar with the R33/RB25 turbo. The R34/VG30 turbine covers wouldn't be my choice, another 500 rpm or so I reckon.

:D cheers :D

predator Grand Master

predator

Posted
Posted
We had a GCG ball bearing high flow on an RB20DET (170,000 ks' old), made 225 rwkw at 1.3 bar with 1 bar at 3,000 rpm, no boost drop off till 7,500 rpm, made good power to 8,250 rpm. Highly recommended.

what were the other support mods?

silver gts-t Grand Master

silver gts-t

Posted
  • Author
Posted

well, ill let you know how i go early january when i finish my tune

mods:-

- full 3" exhaust

- walbro fuel pump

- gtr injectors

- Z32 AFM

- remapped ECU

- FMIC

- bleed valve

- K&N pod

and adding the gcg stage 1 high flow within the next 2 weeks

Sydneykid Grand Master

Sydneykid

Posted
Posted
what were the other support mods?

Let me think;

POD, heat shield, substantial air feed

Performance metalcraft split dump

3.25" Nismo exhaust

No cat

OS Giken twin plate with flywheel

No HICAS

No aircon

Electric fan

Power FC with BCK

Castrol 10W60 oil

Oil cooler

Optimax

NGK copper plugs

One full day tuning on the dyno (plenty of time spent around the boost build rpm)

All on a 170,000 k's old RB20DET, that showed OK leak down figures for its age

:( cheers :P

silver gts-t Grand Master

silver gts-t

Posted
  • Author
Posted
i only made 254 hp at the wheels with stage 2 r33 hiflow turbo. This was on an auto r32 mods:

pod

3inch exhaust no cat

FMIC

z32 AFM

gtr injector 040 fuel pump

Have had the standard computer chiped (Romed)

Oh and mine is very laggy

i almost made that power with just an rb25 turbo..

get your car looked at i think

predator Grand Master

predator

Posted
Posted

I agree.. i have an auto r32 with rb25 highflow (not gcg however) and checked today the revs vs boost, and its making 12psi (tubotech controller) by 3800rpm.. without any proper tune. No idea of power at the moment.

Tune coming tuesday for some figures.

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