What box for SR

[superclarkey]

Well I'm getting fed up of this subject, I bought a R34 GTR Getrag box to use in my 180sx, it turns out that it needs a few bits to make it back to working condidtion and it would cost me more then buying a new box :wack:

I just need a gearbox solution, and i'm looking for ideas, i've been looking at posh after market ones but i don't think any of them would be really upto the job, Quife boxes are £6k and only rated at 350bhp :wack: unrealistic market there hey?

Any surgestions or things i could look at, I still think the best solution would be a getrag V160 R34 GTR box, but at £3k its just not worth it for a secondhand box.

Will be running 550bhp and 550ft lb, needs to be able to hold 600-700bhp at least.

Clarkey.

[Famous jh]

hmmm shit one lad...

Are bmw boxes any use?? Something like an E39 M5 box maybe? They tend to be able for lots of horses..

[Robbie Daly Ps13]

Jesus lad its hard to know....! Whats a rb25 box good for....! Close to 600.....! Your pretty limited if your looking for something that will hold 700 bhp....! Z32 box are same internals as an rb25 aren't they....! I know its expensive but maybe getrags the way 2 go....! Unless you wanna keep on blowing rb25 boxes....!

[S13..KEV]

i have 350hp and 350 torque flywheel power and have a CA18 gearbox in it the last two years.only blow it four weeks ago.it took some hardship.it is down to driver end of the day i think.ya could get away with RB25 R33 SKYLINE box.hard to know whats right in this game

[superclarkey]

I had a 400bhp SR with a stock W71C gearbox and it lasted all year, on sticky Federal RS-R595 tyres, just got a bit noisey but didn't break.

The Rb25 box is clearly a good option and i already have the conversion plate here, but the box will not really be happy with 550bhp, thats thet same as running it behind a 650bhp skyline engine (as skylines don't make the torques the SR's do at the same power)

Because i plan to use Nitro to bring the car up onto boost it will produce alot of low down grunt, and will smash gears..

The other thing to bear inmind is the finial ratio, most people run 4.4/4.6 finals which doesn't pit as much load on the gearbox, but i run 4:1 finial as i prefer long gearing.

Clarkey.

[pole drift]

mike dean cut and welded a sr bellhousing onto a rd25 box, iv heard his car has big enough power, anyone know the figures??

[S13..KEV]

there is so many choices.try figure out which last the longest and best for the car.which is a job in its self

[superclarkey]

I'm sure if i wanted to i could make a small casing box last me, but i don't liek the fact i have to constantly drive around the box, thinking soft clutch pedal thoughts... lol.

99% of the problem is the clutch people used, i used a OS Giken supersinge and it was perfect, slipped when dropping clutch in low gears and always griped ect, I've now got a silvertop HKS twin plate sprung clutch which is more agressive.

I have full RB25 gearbox set up here, just would perfer something more hardcore.

[S13..KEV]

i'm sure if i wanted to i could make a small casing box last me, but i don't liek the fact i have to constantly drive around the box, thinking soft clutch pedal thoughts... Lol.

99% of the problem is the clutch people used, i used a os giken supersinge and it was perfect, slipped when dropping clutch in low gears and always griped ect, i've now got a silvertop hks twin plate sprung clutch which is more agressive.

I have full rb25 gearbox set up here, just would perfer something more hardcore.

or some thing more special on the spec sheet ha ha:d

[yowdy]

clarkey i gave a mate of mine a r33 gtr no getrag box l8ly to put into a 180 thats going to run big power,, we reckon that it will be easy enoughto work,, or modify a r154 bell housing with a sr20 end and put a srtwin plate with j1 disks