Twin turboing a GTSt - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Japspeed · 30th November 2005, 02:00 PM

Seeing as this is the land of the twin turbo i thought i' ask if anyone has info on converting a GTSt from single to twin turbo and what's involved.
I have 2xTo4 turbos and i know someone with a spare GTR exhaust manifild.
We run nitrous and a large HKS FMIC with a mines ecu presumably with the matching injectors i'm told come with it.
The car came in like this and we want to run it on the strip even though it's not the best at getting the power down i thought it might be fun to TT it.
Not sure of the finer points or even the power i could expect.
Any info will be read with interest.

Chris

SteveN · 30th November 2005, 02:16 PM

Even the smallest T4s are good for well over 400bhp, most far more, so twin T4s would be well OTT and take for ever to spool up.

A Mines ECU is just the standard ECU re-chipped, so would be useless once the spec was changed.

No way T4s would fit a standard GTR manifold anyhow, even if there was room, which there isnt, the flanges are different.

There no reason to mess with TT setups really anyhow, a big enough single turbo can give you as much power as you ever want too, with no real disadvantages.

paul creed · 30th November 2005, 02:27 PM

As Steve said,
Total waste of time to achieve what a good single turbo can achieve even on stock internals of a GTST.
Too many other considerations to go to TT. Most of the GTST stock components are good for 400 hp (as long as the turbo internals are uprated).
With good mapping and a good turbo, there's no reason why you cant push an easy 400 and to be honest be a lot less laggy than a GTR of similar power, and just as much fun too.

Kev Atkinson · 30th November 2005, 08:00 PM

I'm interested in the output on standard internals for a GTST, I want round the 400 bhp out of an R33 GTST, any advice on the hows and whys?

(I'm a newbie so I'll start the rounds to the meets next yr, can't wait)

Daz · 30th November 2005, 09:09 PM

Speak to a guy on here called "Mambastu" ... he's got a 200sx which he's dropped and RB25 into from a 33 GTS-T ... and then he's twin turboed it. He' should be able to offer some advise - if you definiately want to TT the GTS-T.

I've had the pleasure of going out in it too .... goes SUPERBLY well.

Chris Wilson · 2nd December 2005, 02:55 PM

Quote:

Originally Posted by Kev Atkinson

I'm interested in the output on standard internals for a GTST, I want round the 400 bhp out of an R33 GTST, any advice on the hows and whys?

(I'm a newbie so I'll start the rounds to the meets next yr, can't wait)

I have a GTS-t engine in an RGTS-t, it gives 490 BHP on decent fuel, reliably, on an engine dyno (no funny rolling road figures

). The bottom end is factory stock apart from a freshen and decent rod bolts. It gives about 460 on pump fuel. Mods are cams, injectors, Power FC, bigger AFM, bigger fuel pump, Apexi turbo and wastegate on Apexi manifold, big intercooler, lots of mapping. The power is more a stock chassis on decent dampers can handle. I have made substantial chassis mods, it was a death trap before.

I can duplicate the engine and map too

ExScoobyT · 2nd December 2005, 07:12 PM

Chris - your PMbox is full...........

skylineman · 3rd December 2005, 06:08 AM

My gtst is running 430bhp, on standard internals,only mods are rebuilt turbo, 555 injectors, z32 afm, 250lhr pump, intercooler, induction kit. no need for a twin setup, stick with the single.

Chris Wilson · 3rd December 2005, 12:44 PM

On stock compression? Wow, that sounds marginal, on UK pump fuel, anyway. This one of mune has the compression dropped just over 1.

SteveC · 6th December 2005, 02:49 PM

Quote:

Originally Posted by skylineman

My gtst is running 430bhp, on standard internals,only mods are rebuilt turbo, 555 injectors, z32 afm, 250lhr pump, intercooler, induction kit. no need for a twin setup, stick with the single.

what sort of torque levels are you getting, Mambastu's RB'd sx has got a really nice torque curve.with 348 lbs/ft.405bhp that is a much better spread of power than I had on my old GTR, 307 ft/lbs with 415 bhp.

IMO twins are well worth it.

need a nice forward facing plenum, decent IC and new manifold though so it isn't the cheapest route to take.

/Steve

30th November 2005, 02:00 PM	#1 (permalink)
Japspeed GTR Register Member Join Date: Feb 2005 Posts: 5	Twin turboing a GTSt Seeing as this is the land of the twin turbo i thought i' ask if anyone has info on converting a GTSt from single to twin turbo and what's involved. I have 2xTo4 turbos and i know someone with a spare GTR exhaust manifild. We run nitrous and a large HKS FMIC with a mines ecu presumably with the matching injectors i'm told come with it. The car came in like this and we want to run it on the strip even though it's not the best at getting the power down i thought it might be fun to TT it. Not sure of the finer points or even the power i could expect. Any info will be read with interest. Chris

30th November 2005, 02:27 PM	#3 (permalink)
paul creed Gone Join Date: Feb 2003 Location: In hell Posts: 4,693	As Steve said, Total waste of time to achieve what a good single turbo can achieve even on stock internals of a GTST. Too many other considerations to go to TT. Most of the GTST stock components are good for 400 hp (as long as the turbo internals are uprated). With good mapping and a good turbo, there's no reason why you cant push an easy 400 and to be honest be a lot less laggy than a GTR of similar power, and just as much fun too. __________________ ( OO\ SKYLINE /OO) GTROC Artwork/Calendar Designer 2002-2008 Get your 2009 Calendar here ---> http://www.gtr.co.uk/products-86.html CAPTAIN BLACK - LIFETIME MEMBER #070 The New Book is out :) http://www.gtr.co.uk/products-64-toV...g_marvel_.html

30th November 2005, 08:00 PM	#4 (permalink)
Kev Atkinson New Users Join Date: Nov 2005 Location: Eastbourne Posts: 2	GTST output I'm interested in the output on standard internals for a GTST, I want round the 400 bhp out of an R33 GTST, any advice on the hows and whys? (I'm a newbie so I'll start the rounds to the meets next yr, can't wait)

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30th November 2005, 02:16 PM	#2 (permalink)
SteveN GTR Register Member Join Date: Aug 2002 Location: Just off the M5/A40 Posts: 7,209	Even the smallest T4s are good for well over 400bhp, most far more, so twin T4s would be well OTT and take for ever to spool up. A Mines ECU is just the standard ECU re-chipped, so would be useless once the spec was changed. No way T4s would fit a standard GTR manifold anyhow, even if there was room, which there isnt, the flanges are different. There no reason to mess with TT setups really anyhow, a big enough single turbo can give you as much power as you ever want too, with no real disadvantages.

30th November 2005, 09:09 PM	#5 (permalink)
Daz GTR Register Member Join Date: Aug 2001 Location: In the South Posts: 6,017	Speak to a guy on here called "Mambastu" ... he's got a 200sx which he's dropped and RB25 into from a 33 GTS-T ... and then he's twin turboed it. He' should be able to offer some advise - if you definiately want to TT the GTS-T. I've had the pleasure of going out in it too .... goes SUPERBLY well.

2nd December 2005, 07:12 PM	#7 (permalink)
ExScoobyT GTR Register Member Join Date: Jan 2004 Location: `down sourfff Posts: 1,052	Chris - your PMbox is full...........

3rd December 2005, 06:08 AM	#8 (permalink)
skylineman GTR Register Member Join Date: May 2005 Location: northampton Posts: 174	My gtst is running 430bhp, on standard internals,only mods are rebuilt turbo, 555 injectors, z32 afm, 250lhr pump, intercooler, induction kit. no need for a twin setup, stick with the single.

3rd December 2005, 12:44 PM	#9 (permalink)
Chris Wilson GTR Register Member Join Date: Aug 2001 Location: Shropshire Posts: 1,551	On stock compression? Wow, that sounds marginal, on UK pump fuel, anyway. This one of mune has the compression dropped just over 1.