Strong Gearbox

iXNAY · Post by **iXNAY** » Thu Sep 18, 2008 11:36 pm

This has been talked about again and again but tonight i broke the second gearbox in my car so i really need something thats going to hold the power without breaking...

what are peoples opinions on this or what have people done?

ie.. supra 5 speed/rx7 in mazda bellhousing/pajero gearset in starion box

i have around 160rwkw so i need something that can handle that power

OLD FART · Post by **OLD FART** » Fri Sep 19, 2008 4:45 am

iXNAY wrote:This has been talked about again and again but tonight i broke the second gearbox in my car so i really need something thats going to hold the power without breaking...

what are peoples opinions on this or what have people done?

ie.. supra 5 speed/rx7 in mazda bellhousing/pajero gearset in starion box

i have around 160rwkw so i need something that can handle that power

Ryan I've had my car for 16 years and haven't managed to break one yet with more power than you & I don't think I drive like a nana ( others may think differently )
So is it the way you drive = flat shifting ,burn outs downshifting without matching revs to speed ,Dropping the clutch etc
Redzone thinks that the RX7 combo is the way to go and is going to put one behind the twin cam in his widey eventually

Website · Post by **WidebodyWoody** » Fri Sep 19, 2008 7:21 am

I've always thought that it was the driver personally. I am no expert though.

I am sticking with my box until it dies, then swapping it out for a RX7 box if it ever dies. :beer

redzone · Post by **redzone** » Fri Sep 19, 2008 7:46 am

yeah driving style might have a bit to do with it ryan, unfortunately. what has failed on the boxes? from this we can work out whats happening to cause it..

i sold my last turbo gemini a few years ago, never broke a gearbox (had it for a year and did 13.5's) and the guy who bought it off me smashed that box 3 days after he bought it. he put a new one in, and smashed the new one in 5 days. next one lasted 2 weeks, i think he was starting to get the hang of it. i had done track days, drifting, rev dumps at 60kph, 2nd gear take offs at 7000rpm smoking em up to 100 etc etc, never even made a noise out of the box. you can do these sort of things

those boxes are renowned for being good to 11's. its just an unfortunate thing that some people's technique is harder on parts than others. for example you could put an RX7 box in or supra box and smash it too, if its a technique thing.

iXNAY · Post by **iXNAY** » Fri Sep 19, 2008 9:06 am

its probably more of me doing hellies and burnours and just shift hard i probably need more practice on being softer on the gearbox....

the gearbox i broke now i think i have ripped all the teeth off second gear :)

www.18u · Post by **www.18u** » Fri Sep 19, 2008 9:50 am

I think Ryan wants a gearbox he can do burnouts with and flat change, without having to worry about breaking it. There are a few options, but none are cheap :( The syncros in our box are not made for high rpm and the gears and bearings are not big or wide enough for what your trying to achieve. Don't forget Ryan, your car might be making 169kw but the torque has probably trippled

especially when all of our upgrades (L300) are designed around making low down torque. Do you remember Adam saying that it was making half the torque of a worked 2j :D

iXNAY · Post by **iXNAY** » Fri Sep 19, 2008 4:50 pm

yeah well we best find out what options there are and ill just open up the bank account for it!

JAS · Post by **JAS** » Fri Sep 19, 2008 5:50 pm

Ill be using the RX7/B2200 gearbox in my twincam starion. I had to buy the Belhousing new from Mazda which was not cheap, but Id say cheaper than getting a new belhousing made up.
My Brother used to have a S4 RX7 and that box was very nice to use. Plus Ive seen RX7s do 10s with a standard box, so they should be strong enough to handle what Ill be doing with it :)
Has anyone in Aus or NZ done this conversion yet??

redzone · Post by **redzone** » Fri Sep 19, 2008 6:17 pm

yeah "rally" has done it in his rally car. i'll be doing it to steve's widey when it eventually gets here :)

also the orange car will probably be copping one soon too, tim's a bit worried about it...

S0LJAH · Post by **S0LJAH** » Fri Sep 19, 2008 10:28 pm

just for info sake this guy appears to have an alignment issue with the rx7 gbox swap (its a 4g in an rx7 tho :P )

http://projectzerog.com/forum/viewtopic.php?t=1119

and heres his project thread

http://projectzerog.com/forum/viewtopic.php?t=722

thrash · Post by **thrash** » Fri Sep 19, 2008 11:20 pm

iXNAY wrote:...and ill just open up the bank account for it!

dogbox :beer

Station · Post by **Station** » Sat Sep 20, 2008 2:20 am

Ford Sierra Cosworth Borg-Werner gearboxes. Do a search, they're based on the Ford Type 9's and are very strong and have loads of upgrades available.

JAS · Post by **JAS** » Sat Sep 20, 2008 8:10 am

Station wrote:Ford Sierra Cosworth Borg-Werner gearboxes. Do a search, they're based on the Ford Type 9's and are very strong and have loads of upgrades available.

A guy I know here was using one of those in his starion rally car and he kept braking them. He even had a gear set imported from the UK. Cost him heaps and still kept braking them. He runs a single cam MPI motor with a TD05 16g. So not massive HP by any means. Hes now having a belhousing made up for a Supa 5 speedbox. And custom gear set... He seems to think it will be heaps stronger.

RiceThief · Post by **RiceThief** » Sat Sep 20, 2008 10:01 pm

What about getting the bellhousing for the w58 supra gearbox as you can ppg gearset for them and the bellhousing is available from the castlemaine rod shop.

JAS · Post by **JAS** » Sun Sep 21, 2008 7:52 am

RiceThief wrote:What about getting the bellhousing for the w58 supra gearbox as you can ppg gearset for them and the bellhousing is available from the castlemaine rod shop.

Whats the belhousing worth??
He guy here is having his own gearset made...

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