Cubes

No idea really vspec or not.. The S15's brochure claims it runs the same helical diff as the R34 GTR.

Sky30, How many more kays have you racked up since you dropped the motor in with its 270,000km's? 26GTS, Have another read of the guide, on page 6 there is a few notes on engine mounts. It states.... The RB30DET block is approximately 38mm taller than any of the other RB blocks. This causes a few fouling issues with the bonnet when used with the high Rb25 stock inlet manifold/plenum. The Rb26 inlet manifold/plenum doesn't have these issues as it sits much lower. If you want to run the stock rb25 inlet manifold/plenum you will have to lower the engine by 15mm on the drivers side and 12mm on the passengers side. You will then be required to remove the lower lip of the radiators shroud otherwies the fan will much it up. blah blah.... just one more reason to use the rb26 head.

Do the R34 GTR's have any issues with their Helical rear diff?

I still dont understand this high pressure fuel lines thing. Fuel lines to me are metal lines with rubber lines/hose connecting up to the fuel pump, fuel filter and finally the fuel rail. Its always worth changing fuel line hose after its 5 or more years old, especially if you plan on running close to the maximum rated pressure. I'm unsure with the R33's but with the R32's Nissan use crimp type clamps on the fuel line hose. These hose clamps are total crap and would not trust them to hold the full 75psi pressure that EFI fuel line hose is rated at. Check your fuel hose clamps and fuel line hose for *any* little cracks. Head down to the local sprints, motor mates, supercrap, autobarn and ask for a few meters of EFI fuel line hose. It will be expensive per meter if not then chances are its std fuel line hose that is not rated for high pressure efi use. To replace some of these little rubber hose pieces is a real pain in the arse, in the R32's you are required to remove the fuel rail and possibly the plenum, it takes ALOT of time.

As always... you never really get the full story. Must be a gold radiator rather than aluminium.

GTR head is the way I would go if I were to do it again. Stuff lowering the motor via engine mount mods. + GTR heads always sound a little different/tougher than the GTST's. Unsure if its the twin turbo or if its the cam spec's.

Skyline GTST full tank generally means around 50litres...

hehe thats ok then.. I saw the blue and thought nooooooo.

My std IC piping actually fitted much better; like it was meant to be. Radiator hoses are not affected. Exhaust manifold is not affected, how can it be?! Dump pipe obviously needs modification as the motor sits slightly higher. I paid $60 or something and had them cut and weld in a little spacer so to speak. It all drops in and bolts up much easier than you would expect.

I just saw in a pic... Some ones using a valvoline 'high performance' oil filter.... oh ohh.. they are crap, very bad.

Come summer, if you drive down those two streets you will most definintely be defected. They have setup defect stations at the end of rundle for many years, for the 11 years that I know of at least. Occasionally you see a defect station down Anzac also, much easier to get around them on Anzac, not rundle and hindley though.

Abo bob, Mines the opposite.. Stone cold it will open wheel really badly. Once it gets a little warmth in it tends to LSD up a little better. :S

Still... I wouldn't be going by what some one says.. Its much safer to simply measure it all up, you then know what + or - dome required. My Rb25 head cc'd up at 62.2cc's. The Rb25 and 26 pistons also vary in their Pin height. So this is something also to look at if you want to optimize squish, which why wouldn't you for a little bit of research.

The VLSD being in an R34 should still work quite well.. Its not like its an R32 VLSD thats 13yrs old. Mine open wheels through first gear and 50% of the time through second.

Grab a r32 gtr mech clutch center and half shafts (5bolt). You can also fiddle with the ratios if you wish. 3.7, 3.9, 4.083, 4.11, 4.363 are available. I've seen the gtr centers go from 450-650. Im going a 3.9:1 out of the auto s13/s14/s15's, should work a little nicer with the 3ltr. Or there's 1k for a decent 1/1.5/2 way that clunks a little around corners.

Definitely a bugger. Grab a copy of the r33's ecu pin out. Check that power is coming from the fuel pump pin.

Cars are very simple.. The measure how much air enters the motor then puts in say 1 part fuel for every 15parts air. As a result.. the car runs fine on the stock ecu. Obviously limited as the RB25 head flows so much more air, as a result I was hitting fuel cut. The PowerFC handled it quit well. AFRs were pretty much spot on, light load didn't need touching. WOT required a small tweak of afr's around 3500rpm - 5000rpm. Ignition timing had to be pulled out a little due to the back pressure the stock turbo caused on the 3ltr. After putting the VG30DET BB turbo on its taken another 6-7degree's ign. timing at wot.

Yer mine made 115rwkw dead stock. 150rwkw with exhaust and 12.5psi. 164rwkw with exhaust, fmic, 15psi.

Its probably making more power than you realise... If its spinning up a little towards the end of first with not near bald tyres then I would say it is making more power. Unless the diff is buggered.

I've seen them. I would think not benifitial for street, but most definitely benifitial for track work. Anything to help keep the diff cool is a good thing. The bathurst gtr's had diff oil coolers.

The GTR flange is the same 5bolt flange as the GTST's. Well so I've been told by an importer. For the GTR center to fit up in your GTST diff housing you will need the GTR center and half shafts. IF you want the tougher GTR axles grab the GTR axles and hubs. I'm going to drop the whole GTST housing grab the GTR center and half shafts and track down a S15/S14/S13 Auto 3.9:1 crown and pinion then take it to some one to install and shim up to make sure its nice and tight. Hopefully the 3.9:1 will help fuel economy a little and make use of first gear. 40km/h in first at peak power isn't much fun.

Rb25de injectors are rb20det injectors. Same part number, same flow. I ran my RB30DET in on the stock RB20DET ecu, it couldn't handle any more than approx 6-7psi as it would fuel cut.

thanks.

No idea.. Mines an R32. It has 4 wires. Throw a multimeter on to it, disconnect them etc to see what happens.

Suck and see as they say..... I did it because I was bored and trying to avoid my end of year uni assignments. Its an easy mod. Just in case I wasn't clear, the external bosch pump has 8ga running directly to and from it.