R34 Gtr - Time To Go The Next Step!

[r0bstr_]

G'Day All,

Recently acquired a very nice 1999 R34 GTR V-spec (ex TPG34R) and the power bug has bitten already.

The GTR is already quite modified with some nice fruit and drives quite nice however, I'd like to get into the 550awhp+ league.

On the current conservative tune, it's pushing approx 450rwhp and 410awhp.

The internals of the RB26DETT as far as I'm aware are completely stock (disregarding the HKS V-CAM).

Do I go a big single? Do I keep the turbos I have? Do I upgrade to -10's?

Do I keep the same setup and just stroke to 2.8L courtesy of HKS?

I do like the responsiveness of the current setup however, if modifying further will in turn make the response a tad more laggy it really wouldnt bother me, as long as boost comes on by 3400rpm I'm happy (HKS V-CAM should make this happen even with a big single I've been told!)

I'd like to keep the car as reliable as possible so I'm thinking before doing any further modifications, I think it's wise to put some 'failsafe' gear on it such as a Sump Baffle, etc?

Opinions here would be great! <Insert usual stuff that goes wrong on 34 GTR's once you push the power I'm pushing+ here)

What should I be looking at next? All opinions are most welcome!

Current setup:

Internally stock RB26DETT (1999 R34 GTR V-Spec motor)

HKS V-CAM Step 1 Type A ($5600 alone and rare)

Garrett 2860r-5's with 1 bar wastegate

Sard 700cc injectors

Nismo Airflow metres

Apexi PowerFC w/hand controller

Tomei Xpreme Exhaust Manifold

Racepace custom 4" exhaust with Mines Style dump ($4000 & the pinnacle of exhaust systems)

Racepace custom 19" Row oil cooler with thermo

Racepace custom water / oil tank

Racepace silicon hoses

Racepace fitted 450lb springs

Racepace customer upper control arms

Whiteline heavyduty adjustable front sway bar

Whiteline heavyduty adjustable rear sway bar

HKS Cam Gear & timing belt

Carbon Fibre Twin Plate Clutch

Koyo Race Radiator

PHR Billet Radiator Support

ARC Radiator Shroud

19" VOLK TE37 Bronze 9.5" all round

275 / 30 / 19 Bridgestone RE01R Tyres with 70% + tread

DBA5000 two piece front rotors w/Ferodo DS2500 @ 90%

DBA400 Rear Rotors w/Ferodo DS2500 @ 90%

Project Mu handbrake shoes

Nismo Braided Brake Lines

Cusco Master Cylinder brace

[MrStabby]

You're not making the power you can with -5s, should be more like 500hp with those on a good setup. What boost are you running? Might need to just wind it up and retune.

Check the sticky to see what others are getting with -5s.

[r0bstr_]

MrStabby,

Could you please link me to this sticky thread? I can't seem to find it.

Thanks.

You're not making the power you can with -5s, should be more like 500hp with those on a good setup. What boost are you running? Might need to just wind it up and retune.

Check the sticky to see what others are getting with -5s.

[MrStabby]

In Forced Induction Performance

http://www.skylinesaustralia.com/forums/topic/93880-rb26-turbo-upgrade-all-dyno-results/

[dkbcleaner]

How long will the internals last?? Go the 2.8 then wind up the boost and you will never look back

[Ziller]

How long will the internals last?? Go the 2.8 then wind up the boost and you will never look back

The unopened engine will probebly last longer that the built engine lol....The guts of them have survived over 100,000kms of abuse and are still running. You dont see to many built engine lasting that long.

rObstr are you kidding? just leave it for now! Just take it to a well known tuner to sort it out as is.

I think you need to cool down a bit buddy, plenty of time for that later when you learn more about these cars.

[r0bstr_]

Haha.. what can I say.. HKS 2.8L, T04Z and external gate in an R34 GTR coupled with HKS V-CAM makes me wet.. just a little.

However, if I can push more boost and get a better tune (which I'm sure is very possible) out of my current setup keeping it within safe limits, then I'll do so.

Anybody have opinions on how to make my current setup even safer? What should I be replacing/adding to ensure complete reliability?

The unopened engine will probebly last longer that the built engine lol....The guts of them have survived over 100,000kms of abuse and are still running. You dont see to many built engine lasting that long.

rObstr are you kidding? just leave it for now! Just take it to a well known tuner to sort it out as is.

I think you need to cool down a bit buddy, plenty of time for that later when you learn more about these cars.

Edited May 27, 2012 by r0bstr_

[choyda]

Hi,

I have a similar setup (no VCAM) and getting around 480rwhp on -5's. I ditched the AFM's - running Vipec (MAP).

From a reliability perspective, not sure how much difference it makes moving away from AFM's.

Solid piping from airbox/pods may make a difference

What fuel pump are you running?

Damien

[r0bstr_]

To be honest I'm not 100% sure.

From the sound of it: a single in-tank 044.. makes a little "squirt/push" sound every 4 seconds.. would that be right?

Hi,

I have a similar setup (no VCAM) and getting around 480rwhp on -5's. I ditched the AFM's - running Vipec (MAP).

From a reliability perspective, not sure how much difference it makes moving away from AFM's.

Solid piping from airbox/pods may make a difference

What fuel pump are you running?

Damien

[r0bstr_]

Actually listening to Bosch 044 pumps on youtube, I don't think it's one of them..

Definately does not make that loud noise when ignition is on!

It makes a slight zim noise (can barely hear it) when I switch the ignition on for a split second then goes quiet.

On idle every 3-4 seconds you can hear it make the cool squirt noise from the rear.

Any ideas?

[gtr jet]

How much boost are you running? I'm sure if you wound it up to say 22psi or so you'd get closer to your goal. Why not just ring your local tuner of choice and see what they recommend?

[r0bstr_]

I've been told by the previous owner it's running 20psi however, I wouldn't really know how to confirm that.

Car doesn't have an EBC so I'm assuming it's has some type of boost control valve in the engine bay.. Any way to confirm?

[choyda]

EBC would be good. I'm running 18psi.

Not sure around your fuel pump. If you're cornering, surge tank for reliability with in and out tank pump?

Even the direct to battery wiring mod for the fuel pump?

[wedge_r34gtr]

Haha.. what can I say.. HKS 2.8L, T04Z and external gate in an R34 GTR coupled with HKS V-CAM makes me wet.. just a little.

Me Too!!!

I think your next investment should be an EBC. Its strange that the previous owners have spent $20k+ on support mods and yet no EBC has been installed.

Also, +1 for ditching the MAF's, go for a vipec/link or haltech MAP setup. Remember, a good safe tune will is the best thing you can do for relibility.

IMO if you plan to keep the car off the track, installing the above two items should get you ~500+rwhp, which is ample for the street. If the plan is to track the car, an upgrade the oil system is a must with an extended sump, baffels and new pump. This has been covered in mant topics so i won't go into further detail

[gtr jet]

If it was done at Racepace then it might have one of there manual boost controllers on it.

Give them a call, let them know your mods and see what they say.

Or try upgrading injectors and fuel pump and give E85 a go.

[N1GTR]

PLEASE STOP NOW!!!!!

Don't take this as an attack or anything but it's looking like you don't know much about GTR's.

You've bought a tuned GTR from someone who had the sense to take it to the best workshop in Australia to get the work done and car taken care of. Don't go fu(king it up now!

If you want more from it, go back to Racepace and ask for a stage 2 engine. It's not cheap, but you'll be in the 400kw range with a mountain of area under the curve while being totally reliable and sedate to drive around town.

[N1GTR]

I think your next investment should be an EBC. Its strange that the previous owners have spent $20k+ on support mods and yet no EBC has been installed.

Racepace don't use EBC's, it's not strange at all

[r0bstr_]

Does removing the MAF's make a big difference?

I'm currently running 2x Nismo AFM's and an Apexi PFC as the ECU..

Wouldn't going down this path make very little difference.. or?

[r0bstr_]

N1GTR, I don't know the in's and out's of my GTR as I didn't build it - not GTR's in general.

Anyway, I've moved this vehicle to WA from VIC so Racepace isn't an option. There are still some very good workshops around here anyhow.

[Hadouken]

Is this your car?

http://www.skylinesaustralia.com/forums/topic/356499-topgear-r34-gtr-vspec-with-hks-v-cam/

Wow I know exactly what's in your car.

Whowuddathunkit.gif