What do I need to do first - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Dave-bru-gtst · 14th May 2007, 05:21 PM

I want to upgrade the internals on my turbo. Can anybody please advise me on what I need to do first e.g. would it be to change the fuel pump first or injectors or fit an inter cooler or can I just change the internals from ceramic to steel without doing any of the above.

hodgie · 14th May 2007, 10:48 PM

You should be able to just change the internals of the turbos, everything else is fine for upto 450 ish bhp

Simonh · 15th May 2007, 09:04 AM

Quote:

Originally Posted by hodgie

You should be able to just change the internals of the turbos, everything else is fine for upto 450 ish bhp

not on a GTSt it isn't.....

From your username I gues you have a GTSt - is that a RB25DET or RB20DET, it makes a difference.

On the RB25DET the injectors and AFM should be good for up to about 350ish, you need to think about management to get the best out of any re-worked turbo.

Simon

Dave-bru-gtst · 15th May 2007, 04:55 PM

ty for that and yes its a rb25det gtst

Simonh · 15th May 2007, 05:35 PM

Okay - first of all do a search, this sort of stuff has been covered lots

then we need a bit more information.

What year is the car
what mods are already in place
what do you want from the car ultimately
what sort of budget do you have

I would say in general first get a good service done, change the fuel filter, give the throttle body a good clean, new sparkplugs and make sure everything is working as it should, then sort out your breathing, (intake, exhaust, de-cat) after that I'd do sensible maintenance mods like fuel pump, grounding kit, boost controller.

At this point I would then think about doing the turbo elbow, downpipe, FMIC and possibly an ECU to take advantage of the current state of tune. If it is an early RB25DET you might get away with running a bit more boost than the later ones, up to you if the risk is worth it though.

once you get to this stage you have the basic grounding for changing the turbo either with a direct replacment (my recomendation) or a reworked standard turbo.

at this point you perhaps start to run into injector, AFM and clutch limits, beyond this point you need to start looking at things like headgaskets and internals.

Simon

Dave-bru-gtst · 15th May 2007, 06:46 PM

all the above but not the fuel pump. do i need a inter cooler to if i have a reworked tubo ty dave

Andy Hornsby · 16th May 2007, 05:02 PM

Dave,

You need to know what you after out of your car at the end of the day. i.e. track? drag? or just a fast road car?

What's your budget?

Is the car currently standard?

We can advise from there, but as Simon says, do a sreach. There will be loads of information on here.

Andy.

Dave-bru-gtst · 16th May 2007, 05:42 PM

ty andy the car is not standard all little mods r done but not turbo or pump as for budet not really got one with in reason ty dave

Andy Hornsby · 17th May 2007, 07:14 AM

In that case....................what Simon said.

Head gasket, injectors, use a GTR pump.

Cams make it fun!!

Fuggles · 17th May 2007, 07:17 AM

You may want to think about an oil cooler if you intend on taking it on track and a bigger sump if you are going to do a lot of track work

Simonh · 17th May 2007, 09:44 AM

Quote:

Originally Posted by Fuggles

You may want to think about an oil cooler if you intend on taking it on track and a bigger sump if you are going to do a lot of track work

a definate if you are going to give the car any amount of 'use' I went for an extended and baffled sump just to be sure

other than that as previous post really.

Simon

14th May 2007, 05:21 PM	#1 (permalink)
Dave-bru-gtst Dave-bru-gtst is unaware they can edit their status GTR Register Member Join Date: May 2007 Posts: 47	What do I need to do first I want to upgrade the internals on my turbo. Can anybody please advise me on what I need to do first e.g. would it be to change the fuel pump first or injectors or fit an inter cooler or can I just change the internals from ceramic to steel without doing any of the above. __________________

14th May 2007, 10:48 PM	#2 (permalink)
hodgie hodgie is unaware they can edit their status Executive GTR Owners Club Member Join Date: Oct 2003 Location: Sat in my Car Cars owned: R33 GTR Vspec, with R34 Nur engine Posts: 6,612	You should be able to just change the internals of the turbos, everything else is fine for upto 450 ish bhp __________________ 720 spinner at Spa,

15th May 2007, 04:55 PM	#4 (permalink)
Dave-bru-gtst Dave-bru-gtst is unaware they can edit their status GTR Register Member Join Date: May 2007 Posts: 47	ty for that and yes its a rb25det gtst __________________

15th May 2007, 05:35 PM	#5 (permalink)
Simonh Simonh is back in a GTSt GTR Register User Join Date: May 2002 Location: Nottingham Cars owned: R33 GTR-S Posts: 3,928	Okay - first of all do a search, this sort of stuff has been covered lots then we need a bit more information. What year is the car what mods are already in place what do you want from the car ultimately what sort of budget do you have I would say in general first get a good service done, change the fuel filter, give the throttle body a good clean, new sparkplugs and make sure everything is working as it should, then sort out your breathing, (intake, exhaust, de-cat) after that I'd do sensible maintenance mods like fuel pump, grounding kit, boost controller. At this point I would then think about doing the turbo elbow, downpipe, FMIC and possibly an ECU to take advantage of the current state of tune. If it is an early RB25DET you might get away with running a bit more boost than the later ones, up to you if the risk is worth it though. once you get to this stage you have the basic grounding for changing the turbo either with a direct replacment (my recomendation) or a reworked standard turbo. at this point you perhaps start to run into injector, AFM and clutch limits, beyond this point you need to start looking at things like headgaskets and internals. Simon __________________

15th May 2007, 06:46 PM	#6 (permalink)
Dave-bru-gtst Dave-bru-gtst is unaware they can edit their status GTR Register Member Join Date: May 2007 Posts: 47	all the above but not the fuel pump. do i need a inter cooler to if i have a reworked tubo ty dave __________________

16th May 2007, 05:02 PM	#7 (permalink)
Andy Hornsby Andy Hornsby is Trackday Coordinator GTROC Member Join Date: Mar 2003 Location: Blyth, Northumberland. Cars owned: Blue GTR with some white bits. Posts: 3,384	Dave, You need to know what you after out of your car at the end of the day. i.e. track? drag? or just a fast road car? What's your budget? Is the car currently standard? We can advise from there, but as Simon says, do a sreach. There will be loads of information on here. Andy. __________________

16th May 2007, 05:42 PM	#8 (permalink)
Dave-bru-gtst Dave-bru-gtst is unaware they can edit their status GTR Register Member Join Date: May 2007 Posts: 47	ty andy the car is not standard all little mods r done but not turbo or pump as for budet not really got one with in reason ty dave __________________

17th May 2007, 07:14 AM	#9 (permalink)
Andy Hornsby Andy Hornsby is Trackday Coordinator GTROC Member Join Date: Mar 2003 Location: Blyth, Northumberland. Cars owned: Blue GTR with some white bits. Posts: 3,384	In that case....................what Simon said. Head gasket, injectors, use a GTR pump. Cams make it fun!! __________________

17th May 2007, 07:17 AM	#10 (permalink)
Fuggles Fuggles is on www.gtroc.org Chairman GTR Owners Club Join Date: Jul 2001 Cars owned: none Posts: 26,296	You may want to think about an oil cooler if you intend on taking it on track and a bigger sump if you are going to do a lot of track work __________________

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