Jump to content
SAU Community

Recommended Posts

I'm not reading 260 pages worth of stuff, when from what I've read so far of it (about 10-15 pages in) is mainly people going "OMG, that's great, I plan to do that too"

It seems more of an RB30 chatter then a technical guide

its for ur own good, caus no doubt you'll have plenty of other questions, and it saves us looking back through the thread (like craved just did for you), which u should do instead

FYI those pics i posted are from this thread some time ago, that isnt my exact setup, but very close

Ok were about to start building the latest and greatest 25/30 to go in the race car.

Specs are as follows.

Head is rb25 with oversize s/s valves 1mm over in and 2mm over exhaust with quite abit of port n polishing. Valve springs to suit and the hydraulic lifters have been converted to solids. No more vct, its been blocked off and cams are 265 10.2mm inlet and 272 10.2 exhaust. The new block is running 9.0:1 CR. New 6boost mani to suit t04z and a plasmaman plenum instead of greddy item. New sm4 with cdi to go on to control it all.

Old motor made 370rwkws. Im hoping to easily achieve 420rwkws with this new one. But 450rwkws would be nice. Will probably have to run a 50/50 mix with toluene inorder to achieve it safely.

Old head was stock, just 256 poncams and stronger springs with greedy mani and 6boost mani and gt35r with 8.2:1CR.

Am i dreaming with the new expected power output here? Or does it all sound feasable? This new rb30det will easily be the toughest one to date for us.

if it doesnt make near to 700bhp on 25psi+ i'm gonna have to kick some1's ass, caus i've been told the t04z can make ~700bhp on a properly built motor i.e yours would be one lol

im gonna take a punt and say that 044 is gonna limit the power a bit, but you never know!

Yeh were ditching the 044 and its getting replaced by a magnaflow 1000hp pump with pre and post filters.

Water injection will only stay if its needed, if not then it will go as it will be unnecessary weight. if we did use it we would look at using it pre turbo instead of pre throttle body. But i dont think we would need it as the turbo has alot more top end then before. It worked well on the gt30 cause it was right on the limit and helped get the extra power out of it.

Think gearbox Michael, it won't like circuit racing at 450 rwkw. Check the gearbox oil temps, but I would be surprised if it doesn't need a cooler, especially in Qld. Ditto the diff.

:ninja: cheers :ninja:

geez gary, why do you have to keep coming up with negatives mate? Thats more weight, coolers and pumps for gearbox and diff. Wish we got that holinger gearbox now, it came with built in pump for cooler, atleast im pretty sure it did. The ppg set should handle 450rwkws shouldnt it?

Im really hoping for 450rwkws. Will be good to get it. 700bhp woot!

ive been pushing for that joel believe me. Ive been trying to find a rolling chassis from somewhere. But that means remaking everything again as not everything will be transferable. However it would allow for a complete strip and build a sweet new chromemoly cage that will tie in absolutely everything....haha that gets me going, our current cage is pretty basic :D

geez gary, why do you have to keep coming up with negatives mate? Thats more weight, coolers and pumps for gearbox and diff. Wish we got that holinger gearbox now, it came with built in pump for cooler, atleast im pretty sure it did. The ppg set should handle 450rwkws shouldnt it?

Im really hoping for 450rwkws. Will be good to get it. 700bhp woot!

No problems with the PPG gearset, just watch the gearbox and diff oil temps. They will be marginal, especially when it gets to spring/summer in Qld.

:D cheers :D

Maybe its time to 'upgrade' to the R32 GTST chassis. :D

My recommendation would be a 1989/90 R32GTR chassis, 2 wheel drive it with the RB30. Same weight as the R32GTST but with bigger/lighter (alloy) guards, (alloy) uprights and (alloy) bonnet. Plus you have the option of 4wd'ing it later on.

:D cheers :D

Yeah go R32 Mike so I can whale you in the 33...... :D ...honestly by the time you stiffen a tired old chassis like any 32.... ahh who cares

Seriously now though, don't go pre turbo with the water. It will work over the compressor wheel and do nasties. Way back when they were just shooting a stream into the compressor which did a great job of atomising the water, which did a great job of chopping off the vanes........

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

    • They’re so great that I know of someone pulling one out to go back to a sequential 
    • Hello everyone. I've recently started the research into R34 GTR front bits and running into eye watering prices. On the plus site it looks like some places make 'replacement' fender liners for these cars. At eye-watering-but-less than stock prices. I also noticed there's plenty of diffuser options available too. What I would like to know is if my following assumptions are correct. 1) The OEM guard liners are actually only 'half' the liner. They go together with the OEM brake vents which are a separate item which looks to be quite a large 'panel' that is part of the liner. The GTR bumper has bolt holes along the front. I assume the ones in the vent correspond to the ones the OEM liner does not have (circled?)   2) The V-Spec front diffuser supplants the brake ducts in the above item. I am assuming these still work with the guard liners as there's no alternate part that I'm aware of. I don't see how they go together, so I'm making the assumption that they have to, somehow. I know the center splash guard is different on the V-Spec (and is the price of the damn diffuser alone). How does the liner interact with this? 3) There's alternate front diffusers that do away with it all. Annoyingly, a lot of the clones and CF different ones... have no brake ducts on them. I like the idea of them though. My brakes get hot on the track. These alternate diffusers are a lot cheaper than plastic splash guards. I'm assuming you don't have to/aren't supposed to remove guard liners to run a diffuser. I suspect that quite a few people actually do not run the guard liner because with a front undertray you're getting a lot of 'splash' guarding anyway, and most people remove liners given they're probably running a pretty aggressive setup with a diffuser at the front. It would also be nice to know if anyone has ever run the 'reproduction' guard liners and know whether the fitment is OEM quality or "OEM Quality". Example: https://www.ebay.com.au/itm/356254671561 https://carbonetics.net/products/nissan-skyline-r34-gtr-plastic-front-wheel-arch-set Is this knowledge still around?
    • Really, effort is pretty low. You hand fistfuls of cash over to someone else and pick it up when done...   And at least this shitbox isn't drinking coolant right?  
    • And most chargers that most DIY people own would put bugger all power back into the battery between cylinders. I've always done it with jumper packs/second battery connected. And that's on any car.   Because race car, and wanting the lightness.  At least in an R33, putting a bigger battery in can at least help shift the weight balance backwards  
    • OR, Tell the Motec to STFU, you said shift, so try shifting! But then yes, I agree, more sensors needed to. Put either a wheel speed sensor, or a diff speed sensor on it. Then get an input shaft speed sensor too. (I say input shaft speed, and not engine RPM). This way, you can now also log and see if the clutch is slipping (RPM, vs input shaft speed), and you can calculate gear (Input shaft speed / Output shaft speed). At least then if the gear position sensor fails you have a backup. And realistically, the Motec should only worry about what gear you're in for the parts where I'm assuming you have some power management strategies in it for the lower gears. (IE, lower boost, maybe different throttle curves, different ignition curves, etc etc). But it should stop it shifting. Pull the flappy, that f**ker should just attempt the motion! Heck, even on a sequential like on a motorbike, you can keep trying to kick it up a gear all you want, the physically part of the box takes care of not being able to loop the whole way around the box! Only part you'd have to worry is how it gets to reverse.  But that's on the driver... An R32 shouldn't be so smart as to try and override the driver on a gear shift  
×
×
  • Create New...