Help In Upgrading Dumps And Turbos

[Aussie_Delivered_R32_GTR]

Hi guys, I’m looking for some advice.

I have a 1994 R32 GT-R V-Spec II and would like to upgrade my dumps and turbos (and hopefully gain a bit more power) but seek your advice on best brand/model combinations..........

I wanted a car that was visually as close to stock as possible (even sourced and fitted a new period correct Eurovox AM/FM radio) but returns the most amount of power without compromising driveability.

The current specs of my car are as follows:

• 3.25” HKS Performance Exhaust
• 3” High Flow Catalytic Converter
• Niztune
• Nismo MAFS
• Splitfire Coils
• HKS EVC 6 Boost Controller - Set at max (22 psi) and hidden behind the ashtray.
• Sard 720cc Injectors
• Walbro Fuel Pump (size not known)
• Excedy Heavy Duty Clutch Inc diaphragm, friction plate and throwout bearing. Flywheel machined to suite.

FWIW....... It also has Bilstein front and rear Strut/Shock set up with King Springs and Whiteline upgraded front and rear sway bars.

It was Dynoed at 285rwkw at Croydon Motorsports and 272rwkw at Unigroup Engineering, make of those figures as you will.

Same set up, similar conditions.

It has standard dump pipes and factory original ceramic turbos.

It’s obvious that the STD Turbos are running pretty much to capacity so I’m looking at upgrading both the dumps and Turbos.
I was thinking of TOMEI dumps, open to model/part number recommendations and a pair of Garrett GT2860R-7 Turbos. (R34 GT-R N1 Style).
The car feels like a factory STD car with a healthy amount of performance.

The car will only used for occasional spirited weekend drives.

What dump/turbos combination would you recommend other than what I've already suggested and is there anything else I should look at to enhance the performance without losing drivability.

I’m not keen on changing the cam so would adjustable cam gears serve any merit for more bottom end performance?

Should I change any of the parts already fitted?

I appreciate your input......

Cheers,

Bob.

[XGTRX]

Nope, what you said. N1s, dumps, cam gears and tune.

Edited October 10, 2015 by XGTRX

[Aussie_Delivered_R32_GTR]

Are the cam gears worthwhile with a std cam?

[Sinista32]

Yes.

-9s

Tomei dumps will be fine. Or even r34s.

Careful Bob or you'll catch the mod bug

[sneakey pete]

Front pipes to go with the dumps might be a good idea too.

[infamous_t]

My thoughts based on my cars previous setup.

• Open style dumps (Tomei, Mines, R34 etc)
• Matching front pipes, preferably equal length
• Adjustable cam gears (I saw very good low/mid end gains getting this right)

-7s if you're happy with the setup you have but just want to push the a little bit harder.

-9s if you want to keep similar response to stock, but would like to seem more power (~50hp) over the -7s

On -5s it's very worthwhile opening up the exhaust manifolds while turbos are off.
I'd be interested if people think it's worthwhile on -7s/-9s also, or whether it is seen to negatively impact these smaller turbos?

[Hadouken]

you like your motor?

turn the boost down on those turbos before they kamakazi themselves

[Manuel Kasko]

you like your motor?

turn the boost down on those turbos before they kamakazi themselves

This is exactly what I thought when I figured he was still running stock.

[Aussie_Delivered_R32_GTR]

you like your motor?

turn the boost down on those turbos before they kamakazi themselves

Yep........ Thanks for the advice and hence why I made the original post.

I very rarely take it past 4000RPM so it hardly goes past half its maximum.

The front pipes are part of the HKS 3.25" system so I'm happy to stay with them.

How do these look as upgrades?

http://www.kudosmotorsports.com/catalog/tomei-cam-gear-set-intake-exhaust-tomei-152009-152010-nissan-skyline-r32-gtr-gts-gts25-gts4-gtst-r33-gtr-r34-gtr-p-854.html

http://www.kudosmotorsports.com/catalog/tomei-turbocharger-dump-pipe-set-68mm-275-tomei-expreme-421201-nissan-skyline-r32-gtr-r33-gtr-r34-gtr-stagea-wgnc34-260rs-rb26dett-p-601.html

http://www.kudosmotorsports.com/catalog/garrett-garrett-gt2860r7-r34-turbocharger-set-nissan-skyline-r32-gtr-r33-gtr-r34-gtr-rb26dett-p-307.html

Cheers,

Bob.

[Hadouken]

Hpi dumps are way better.

But you would know that because all of this is extensively covered and a gazillion threads.

[Aussie_Delivered_R32_GTR]

Hpi dumps are way better.

But you would know that because all of this is extensively covered and a gazillion threads.

Yes of course........ Silly me!

http://www.kudosmotorsports.com/catalog/hpi-turbocharger-dump-pipe-kit-hpi-hp2tobnr32-nissan-skyline-r32-gtr-r33-gtr-r34-gtr-vspec-vspec-rb26dett-p-1211.html

[r32-25t]

For what you want, -7s or 9s and open dumps with cam gears and a tune will be perfect,

Cam gears are worth every cent (even with the factory cams)

My new exhaust is being fitted and the tune touched up soon which will basically make it what your car will be and you're welcome to take it for a drive to make sure it's what you want

[Aussie_Delivered_R32_GTR]

Thanks Brett, I appreciate your reply and offer.

I know the Unigroup Dyno is the most modest of the higher profile tuners so if I can get to the magical 300rwkw on their dyno I'd be thrilled.

That requires a 10% increase primarily from the dumps.....

Not sure if that is realistic but my primary objective is to have a safe tune and no blow the whole thing up.

Cheers and thanks again......

Bob.