Jump to content
SAU Community

Recommended Posts

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.

post-78207-0-00448300-1444502133_thumb.jpg

post-78207-0-54447600-1444502152_thumb.jpg

post-78207-0-15656800-1444502171_thumb.jpg

post-78207-0-09126200-1444502197_thumb.jpg

post-78207-0-50576800-1444502214_thumb.jpg

post-78207-0-07821700-1444502244_thumb.jpg

post-78207-0-54525100-1444502261_thumb.jpg

post-78207-0-17788800-1444502278_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/460293-help-in-upgrading-dumps-and-turbos/
Share on other sites

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?

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.

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

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

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Drilled the rubber out on a slow speed and it didn't catch much at all. Probably only half a dozen holes was enough to shred the rubber and it dropped off easily leaving the inner sleeve behind. Will tackle that later
    • I havent bought a manual cover for the dash yet and no cluster change, won't bother me too much, I just need to get that auto box gone, manual in! I miss my manual. 🤪. We started last weekend and managed to get the box out. Planning to start putting it in this weekend and then order a single piece tail. We were super careful to take time and not damage anything. It's my first time working under the car.  With my S15 mainly worked in the bay. This time, it was a headache because of three or four bolts only. They simply didnt want to leave thei homr and the one securing the tailshaft, another above the GB, and the one securing the lipstick was a shit. Mates mate, Davo caught fire 🤣, nearly opened his chest up with a grinder 🤦🏽‍♂️ and both mates nearly had a plate from the box land and slit their head open. Fun times. We all survived. Not the easiest working with limited access on jackstands. As I'm sure we can agree these are the memories which make us love our car. For all three of us, was an awesome weekend and Sunday 3.30am before tools down was a fantastic effort. I need to upload pics, but looks like it needs to be via Url now. We used to be able to just upload pics back in the day. It's been that long! 🤪 Im currently spraying rustoleum under body, not because it's rusted. It's super clean, but just so it's protected for the next 10 years. There was a few surface rust spots. Which pretty much wiped off with a 3M scourer.  Really impressed with how well the previous owner maintained it. Bank account went down so quick! Service, then GB - managed to get a spanking new 34 genuine box from Nissan. All the rest of the conversion parts from Kudos.  Went with a Nismo short shifter. New pedals and Exedy Clutch and FW. Ordered the Prp Rear Main Retainer kit which should arrive Friday and my first engine mod part just like I did with my S15 will be the Tomei Expreme Turbo Outlet. Already on order. It'll likely sleep next to me on a pillow during the coming months. 🥰 Last build was on my JET200GT profile and on SAU and Hardtuned I had documented the build. Planning to try to do that again. Brands feel scarce now. Wish we still had ARC and Apexi parts readily available. Exhaust - need some advice on this. I had an Apexi exhaust on the S15 and loved the tone. My mate had a HKS HP Silent on his 33 and suggested I go with that to avoid drone. I can't remember hearing an RB25DET running that so will likely need to wait for a meet or something to hear it.  Not after big power, just enjoy building it, and drivability with minimal negative attention.
    • Have a chat with Ben at Moore Performance or Jesse at JS Performance.
    • Thanks both. All good advice. Reminds me of drilling through stone wall for drainage pipe 😬 I'll let you know how I get on if I still have use of my hands afterwards 😅
    • Finally got shipping number for the intake and throttle body, shipped by UPS, so "should" be in my hands sometime next week, fingers fracking crossed
×
×
  • Create New...