Drift_Mulisha

Hi there, looking for a pair of T517Z turbo's anything considered.. what have you? Cheers.

Hi guys, looking for an R34 BN Sports front bumper preferably from the gold coast.. unfortunatley new zealand sems to have uras & every other kind of kits but not bn so thinking of geting one shipped over.. if any one knows a retailer or wholesaler that have a website etc.. please let me know.. thanks in advance...

Can anyone answer this? i asked it on page 230 but got no replies.....

sounds like a usefull device if running high power levels, can someone explain the advantege of running a large plug gap like 1.1m and high boost? if you had gapped your plugs down to 0.7mm and was running a lot of boost would this be a disadvantage?

Im also interested in this, just about to order the acl ring set but wich set do i get? obviously the RB30ET rings would be beter as they are almost twice the price. can the RB30ET rings be fitted to the RB30E pistons? Cheers.

Cheers for that SK, you're the man!

Cheers cubes from memory a 1.2mm metal head gasket gives no change in compression on an RB26 so hopefully goin to a 1.00mm headgasket will bump it slightly, havent seen any thinner than that yet for obvious reasons . Does anyone know the formula for working out what the compression ratio will be with a standard 30e block & r32 RB25DE head with a 1.0mm metal head gasket?? Also is there any factory valve springs that interchange with R32 RB25DE that can withstand 300rwkw? have seen stock springs float badly at 260rwkw. would RB20DET Springs be an upgrade? or RB26 etc. Cheers.

Damn! is there any particular reason for this? i know there is varying thicknesses of aftermarket headgaskets.. is there a mechanical reason why this wont work? no budget for aftermarket pistons unfortunately this was my last hope.

Hey guys, about to start on an RB30 build & have got most of it sussed from reading this thread except when using the standard RB30E bottom end compression seems to be around 8.2:1 & was wondering if theres an easy way to bump this up a little? most people seem to be using an RB26 head gasket so would i be able to use an aftermarket metal gasket from tomei, hks or similar thats is slightly thinner to lift compression? does anyone know the thickness of a standard RB26 head gasket? ideally aiming for compression ratio between 8.5:1 - 9.0:1 Cheers in advance...

Gidday i have just brought a n RB25DET Gearbox for my 240kw RB20 powered cefiro, Just wanting to know if there is any really good synthetic oil to put in it any one has used before & can recommend? have heard bad things about redline oils unlesl its a worn box so wanting to steer clear from them. Cheers

Cubes, do you have any dyno sheets from that camparison?? It would be really interesting to see them.

Good point SK , cheers for you expertise! by the way what turbo are you using to get response like that & still make 750hp? i was planning on using a GT3540 with 0.63 exh. as response is the main goal but i only planned to make a max of 600hp. Cheers again for your help

SyndeyKid, do u mind if i ask what rev limit you use in your RB30 engines equipped with spool rods? what is the maximum rpm you have used & what is a safe limit for circuit & drift work? ever had a failure related to them? that is damn good value for money for rods that can take 750hp! Cheers.

sweet, cheers man. would going to an 87.5mm bore be getting closer to 2.7? & would a 1.5mm oversize bore be considered dangerous? i noticed most rebuilds seem to be +1mm and the most extreme i have seen is +2mm on an australian gtr.

Im also interested in buildng up an RB25DE Motor with GTR Crank & rods & some 87mm forged pistons, is there any isses with block height between rb25 & 26? ie: will fitting the gtr crank/rods raise the compression from the pistons coming further up in the bores? does anyone know what thickness head gasket to use to achieve a 9.0 comp ratio? how much more capacity will the 87mm pistons give, is that enough of an increase to call it a 2.7?? or just a "big" 2.6 if that makes any sense. Cheers.

Yo, does anyone have or know where to get the FC Datalogit software for the RB20DET Power FC? without paying the $500 price? hopefully someone here will have it??

Yo, ive got a Garret GT25R (0.70 front & 0.64 rear) on my RB20 using a stainless high mount T3 manifold with a T3-T28 adaptor, making 258rwkw@18psi full boost at 4500rpm. I imagine it would be alot better on an RB24. or seeing as the GT25R doesnt get a great review buy some maybe the 2871R 52T would be capeable of similar power but with a lot better response. those are probably ur best options??

Cheers for your advice, i think ill try installing them & see what happens. ive seen various results with guys using cams & cam gears to dial in a fatter midrange or top end by advancing/retarding the cam gears. hopefully it will bring it down slightly, even 300rpm would be great as where the power comes in now it is quite hard to drive in a drift enviroment & you have to be fairly ruthless with it wich has resulted in several broken gearboxes. Current tune is good, definately not the problem & i'm happy with the power output (258rwkw) just i bit more responce would be nice

Can adding cams do much to bring the boost threshold down? at the moment i get full boost at 4700rpm (garret GT25R 0.64) and would be awesome to be able to bring it down to around 4200rpm. is that realistic? I already have the cams, they are HKS 264's with 9mm lift but i havent installed them yet as i wanted to see what is was like without them first. Also if i install these cams do i have to upgrade the valvesprings if i dont rev the engine any harder? current rev limit is 7500rpm & have had no issues with valve bounce so far. Cheers.

Yo everyone, just wondering if any of the RB20 owners with over 240rwkw have had engine failures or mechanical troubles when used in a circuit/drift enviroment? reason i ask is my rb20 just made 258rwkw @18psi (mods are listed here:) http://www.skylinesaustralia.com/forums/in...ic=103095&st=20 but the tuner recommended i only run with around 1 bar not because the tune wasnt safe, (it was detonation free at 18psi) but because the sheer mechanical strength of the motor could not take that sort of power continuously ie lots of revlimiter action in drift. Any opinions would be greatly appreciated, especially from roy & other RB20 heros who use there cars in circiut or drift where are they are given a pounding. Cheers.

That tune looks somewhat hurrendous, i would be taking that back to who ever tuned it & bitch slapping them. can i suggest that could be the main source of your problems??

Yo, my car is an A31 Cefiro with an R32 RB20det Mods: HKS Pod 3 inch exhaust 600x300x100 cooler Custom inlet plenum (copy of jun surge tank) Garret GT25 400hp turbo (0.64/0.70) tuned length stainless high mount manifold tial 38mm gate. GTR Fuel pump 550cc S5 injectors Sard Reg @ 40psi RB20 AFM mounted in 4 inch intake pipe Power FC Just got back from tuner 2nite & the results were: 258kw@ 18psi (dynapack chassis dyno) supposedly it works out to 406hp @ the flywheel.

There's no need to upgrade your turbo, just come down an exhaust housing size to 0.64 & u will be far better off. As much as the GT25R doesnt look good on paper I have been impressed buy how it performs so far in the real world.

Yo, just a thought here but would you consider going down an exhaust housing size? i assume you have the .86 housing on your GT25R if it is the 450hp version? I have the 400hp version with the 0.64 housing on an RB20 & find the spool pretty reasonable for the size of the turbo. i im getting boost build from 3000rpm with full boost (currently only 12psi due to injectors maxing out & not being tuned) at 3800rpm. which was enough to make 195kw atw. I have no doubt that this setup once tuned should make 230-240kw atw using 18psi. if your aim is only 220kw atw then i would definately change to the smaller exh. housing as that amount of lag is not worth it for that power output. Peace.

What kind of turbo was used to make that much power on an RB20? thats awesome! i thougth the old school T04 setup the gtsr's had wouldnt make anywhere near that power & still be reasonably responsive. is full boost around 4000rpm?