98 R34 Gt-four

[winstonusmc]

Mods:

R32 GTR RB26DETT engine swap

R32 GTR 5-speed transmission

R32 GTR Intercooler w/ t-bolt clamps

Nismo Turbos (R32 GTR)

SARD 700cc Injectors

Aeromotive FPR

Chipped ECU with an HKS bootleg tune

Zietronix wideband w/ boost sensor

Nismo GTR fuel pump 270LPH w/ GTR pump control box

Work Emotion CR Kai 18x8.5, 18x9.5 Wheels

R33 Trunk mount battery

mystery brand short shifter

Razo 350g shift knob

R33 GTS25T calipers w/ Dixcel front slotted rotors and EBC RedStuff pads

R32 GTR Spare tire (yeah they are different)

Z32 Brake Master Cylinder (1 1/16inch)

Nismo Lowering springs (R33 GTR)

R33 GTR front underbrace

Bilstein Struts (R33 GTR w/ Z32 rear uprights)

R34 GTR airbox w/ K&N Panel Filter

Shaved head (0.4mm)

Koyo Copper 2-core radiator

Future:

E60 RB25 Series II MAFs

OS Giken Twin plate clutch

HKS high boost actuators (.9bar min)

I am currently working on tuning this thing via ROM. My goals are to have a very stock looking car with 450hp. Some background:

I bought this car from Mainland Japan and had it shipped down to Okinawa. It was very stock except for a foldout TV that got removed the day I recieved the car. The drivetrain was sourced from a rusted and wrecked R32 GTR. All of the swap was done by me, including the wiring. It really helps that the Junkyards here are full of R33 stuff that bolts onto the R34 easily.

[winstonusmc]

This is a photo string of the evolution of the engine bay. Starting with stock (generic pic, not my bay), then the various steps including when I put the RB25 valve covers on for painting of the RB26 covers.

I am trying to make it look like the car is factory stock. I even went as far as putting the R33 battery tray and windshield washer resivior, which is mostly bolt in. I just installed SARD injectors in it last week. This paired with the Nismo turbos and the RB Neo MAFS should yield and easy 450hp at about 1bar of boost. There are no function dynos here in Okinawa, let alone an AWD dyno, so it will have to be the trusty ass dyno.

A couple of you all may wonder why I am on the Auissie Skyline board. There isnt much english Skyline support here in this county.

[Luke_ENR34]

Well done mate. Going down the same line in my car soon.

[NA_Goodness]

Nice build man, but why start with the GT-four? Wouldnt a GTR be cheaper? Comes with brakes, suspention, exterior and interior differences as well?

[winstonusmc]

Nice build man, but why start with the GT-four? Wouldnt a GTR be cheaper? Comes with brakes, suspention, exterior and interior differences as well?

I bought my car from Sapporo for about $4000us. With all of the mods, its about $8000us total. On Goo-net, the cheapest R34 GTR was aound $30,000us for one that had been wrecked. I know the R32 GTR can be had for cheaper, but I wanted an R34 because they are still kinda rare. I was pretty lucky finding a wrecked R32 GTR to get all of the parts from.

[DLOOOK]

So are you an American in the armed forces?

[winstonusmc]

So are you an American in the armed forces?

Yes Sir!! USMC like the name.

[ssxRicho]

car looks fantastic.

total shock to anyone who didnt know there was an rb26 under there.

[Luke_ENR34]

Did u have much trouble fitting the 26 in there?

What engine mounts did u use?

Any wiring problems?

Cheers

[Owgasm]

So is it a GT-Four driveline or a R32 GTR driveline?

Looks good.

[Sarumatix]

Wouldn't even matter what was inside the car.. the photos from Okinawa win . Going to have to do some training (karate) there soon!

[winstonusmc]

So is it a GT-Four driveline or a R32 GTR driveline?

It uses the R32 transmission. I wish I could get the R33 GTR mission as it is pull type clutch, same as R34 GtFour. It has the R32 GTR Engine as well. Although I did keep the rest of the GTFour drivetrain though, including the stock 4.3 final gear using the old RB25 oilpan as they were the same minus the gears inside the diff. The rear uprights have been changed to facilitate the GTR struts, as they use the fork style lower mount.

Luke, as for your questions here goes. The Rb26 is drop in. I used all the accessories from the RB25 including alternator, starter, power steering pump, A/C compressor, main pully, and all belts from the RB25. A custom A/C line had to be made to clear the front turbo inlet. As far as the mounts, used the factory R34 mounts. In my experience with RB motors, there are R33/R34 2wd mounts and R32 2wd mounts, but the AWD mounts seem to all be the same. I just used my R34 mounts as the rubber in them should be better than the R32 were. The wiring took me a while as the R32 plug design is different from the R34. I basically separated the Engine specific wiring from the RB26 harness and grafted it to the R34 harness. This allowed me to retain all ABS/ATESSA wiring. Also, I used the R34 RB25 lower harness to retain the speedometer and alternator wiring. On this note, I have a couple friends that their speedos still dont work on their R34s, but the GTFour uses a different design to allow for an easier swap. The wiring is the hardest thing in the swap, but I am not sure how the R34 GTR harness is going to swap in. Of course some mapping with a multimeter would help out. This isnt too difficult for me though as the US Marine Corp has taught me all of my wiring skills. I have done a few harnesses here in Okinawa for guys doing swaps, like an RB25 into an S14.

Update:

Installed my E60 MAFs yesterday. The scaling wasnt as high as I though it would be. Just some info on the fuel scaling for my current setup:

SARD 700cc (light blue) injectors 64% scaling at .96ms latency

E60 MAFs (RB Neo) 128% scaling

Kinda suprised me about the MAFs because all the sites on the net were talking about the RB MAFs being 150% larger, but these are the numbers I calculated after a couple runs with my wideband. They should give me the metering to push up the power to a tad over 500hp, but I am only looking for 450hp or so. I really dont want to modify my airbox to run the 80mm MAFs so I am trying to source a used Apexi Super Suction kit for the 80mm MAFs, dont want to buy it new. Right now the MAFs are just hanging off the rubber piping with no filters, terrible!

[Owgasm]

Fair enough.

So the GTFour driveline is constantly in 4wd correct?

[winstonusmc]

Fair enough.

So the GTFour driveline is constantly in 4wd correct?

Its a normal ATESSA ETS system that the GTR runs. I just dont have a torque meter. I think it is the same as the R34 GTR system, without the active rear diff. Unless you referring to the 10% forward bias that the R33/34 GTR has, then yes that is the same.

[spec-V]

No afaik the GT four runs the same setup as the GTR, fronts only engage when the rears slip, whether or not its the same as the Atessa Pro system (where each wheel is induvidual) I am not sure.

[spec-V]

Thought I was right

Crazy build mate love it, definately would scare a few people.. So sleeper!

[winstonusmc]

Some updates:

I have been working on my airbox for the past week. I was going to run the Apexi Super Suction for the larger MAFs, but I really dont want to spend the money. I bought myself an early Christmas present, a Dremel rotory tool. It was really so I could cut up my airbox to fit the larger MAFs to it. I cut the flange off of the old airbox from the Neo motor and sort of glued it to the GTR box with a little if cutting and sanding. I think it will work out OK and should not really be visible when installed. The bottom MAF will only need the hole widened. I had a slight boost leak that I remedied after tuning for the MAFs, so I will have to rescale again now the boost leak is gone. Next, I am going to look for a clutch. I want the Nismo twin that has the red cover made by Exedy, I have been told it has a stock pedal feel.

[Silver_GT]

looks good man if u decide to sell it if/when u go abck to the us, tell me and ill have it shipped to aus, seriously. haha.

Edited December 19, 2009 by Silver_GT

[winstonusmc]

Trying to decide what to do about suspension setups.

Right now I am running Billsteins and Nismo springs designed for the R33 GTR, but that was just to get me by. Next thing will be R34 GTR coilovers of some sort, but I dont know what. Obviously will be used from Upgarage but I dont know what. And then I am think about poly bushings, but I dont know where to get AWD stuff for the fron. I am also wanting to get wider wheels for the front as my wheels are staggered (yuck for AWD). After all this I need a way to adjust camber. I just need a setup for what little touge we have on our tiny island.

I am thinking Tein flex with 275 rubber all around. What camber settings?

[08r3308]

that looks mint , well done