What Gearbox for over 600ft/lb's.. ?
#1
What Gearbox for over 600ft/lb's.. ?
What gearbox would people recommend that will handle over 600ft/lb's? Since my subaru made over that today - thanks again to Dave Wild and Mark at Lateral Performance.
I am guessing I would need to use a dogbox again? I used to use one of these, but I did find it quite noisey - hence me changing it to an uprated syncro.
Do seq gearboxes exist at all? are they quieter? how much are they?
any details of any other gearboxes that can handle this type of torque?
Thanks
I am guessing I would need to use a dogbox again? I used to use one of these, but I did find it quite noisey - hence me changing it to an uprated syncro.
Do seq gearboxes exist at all? are they quieter? how much are they?
any details of any other gearboxes that can handle this type of torque?
Thanks
#5
what about a porsche box? stig runs a 550-600bhp ultima and he uses a porsche box. (supercharged chevvy so plenty of torque) porsche have a 4x4 turbo as well. i know he said the box was only rated to 350bhp but he had had no problems with it.
Last edited by jjones; 01 September 2004 at 10:17 PM.
#7
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been playing with excel again christian?
that is a **** load of torque!
probably best off treating the G/box as a service item with that much on tap.
i bet its good fun to drive
what power did it make???
that is a **** load of torque!
probably best off treating the G/box as a service item with that much on tap.
i bet its good fun to drive
what power did it make???
Last edited by jonny gav; 01 September 2004 at 10:40 PM.
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#8
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no did'nt mean to fit a skyline job, just ment that they make seq boxs for road(ish) cars and thought that they might do one for the scoob
mike
mike
#9
Originally Posted by jonny gav
been playing with excel again christian?
that is a **** load of torque!
probably best off treating the G/box as a service item with that much on tap.
i bet its good fun to drive
what power did it make???
that is a **** load of torque!
probably best off treating the G/box as a service item with that much on tap.
i bet its good fun to drive
what power did it make???
I was thinking of the six-speed, but no-one is running this amount of torque (as far as I am aware) on one, and I don't want to be a guinee pig. So looks like I may have to go down the dogbox route again, if I cannot find anything else.
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Dogbox ideally, think you will be breaking driveshafts on the 6 speed but as Jonny says, probably be a 'service item'.
Wouldnt you love to say that to a service manager?
"In for my 5000 mile gearbox change!"
"Oil sir?"
"No complete box...."
Out of interest using standard diffs?
Wouldnt you love to say that to a service manager?
"In for my 5000 mile gearbox change!"
"Oil sir?"
"No complete box...."
Out of interest using standard diffs?
#14
I beleve the only seq box is the one for the WRC cars, so it most likely wont fit, will be noisy and cost in the region of £30K
I still want one though, just like I want a Mclaren F1
How much torque was/is the JUN impreza, I beleve they got some pretty impressive results from testing a 6spd.
Dave
I still want one though, just like I want a Mclaren F1
How much torque was/is the JUN impreza, I beleve they got some pretty impressive results from testing a 6spd.
Dave
#16
Originally Posted by hawkeye
i thought the 6 speed box was good for 800nm whats that in old money????
So it looks like it will have to be a dogbox then?
#22
Originally Posted by ChristianR
What gearbox would people recommend that will handle over 600ft/lb's? Since my subaru made over that today - thanks again to Dave Wild and Mark at Lateral Performance.
I am guessing I would need to use a dogbox again? I used to use one of these, but I did find it quite noisey - hence me changing it to an uprated syncro.
Do seq gearboxes exist at all? are they quieter? how much are they?
any details of any other gearboxes that can handle this type of torque?
Thanks
I am guessing I would need to use a dogbox again? I used to use one of these, but I did find it quite noisey - hence me changing it to an uprated syncro.
Do seq gearboxes exist at all? are they quieter? how much are they?
any details of any other gearboxes that can handle this type of torque?
Thanks
Carlos H.
#25
Originally Posted by carlos_hiraoka
Christian do yourself a favour, if your engine is really making 600ft/lbs which is even higher to what the actual peak torque of a Peugeot 307 WRC (running close to 4bar) just lower the boost ..... or turn your car into a RWD car and it will be easier and cheaper to find a gearbox that will handle that sort of torque, still be quiet and last at least a couple thousand miles .
Carlos H.
Carlos H.
However, when I do competitions in the channel islands, I want to use all its power! To be honest, I do not want to go for straight cut, but it sounds like I am going to have to...
#29
Originally Posted by 911
Christian, if you are going to hill climb at 600 lbft that chassis will need to be good.
I remember Mark's car at TOTB 1 noticeably twisting about the n/s front corner when he accelerated, and back then that was with a little less torque...
#30
Christian,
If I remember correctly you can use "all the power" with a measly 450ft-lb, simply by making sure you are in the appropriate gear. Granted that's not easy all of the time, but you are not going to be able to put all the torque on the road in the first 2 gears, and struggle in 3rd, but you will most likely be at much higher RPM than your current torque peak to care.
I suggest you get a cheap 6 speed setup and try it. There is a world of difference between snapping an input shaft after serious abuse, and just breaking one due to the normal application of a lot of torque. If you find the standard 6 speed to be deficient, you will have hopefully saved enough money to get it rebuild with an uprated gearset.
Paul
If I remember correctly you can use "all the power" with a measly 450ft-lb, simply by making sure you are in the appropriate gear. Granted that's not easy all of the time, but you are not going to be able to put all the torque on the road in the first 2 gears, and struggle in 3rd, but you will most likely be at much higher RPM than your current torque peak to care.
I suggest you get a cheap 6 speed setup and try it. There is a world of difference between snapping an input shaft after serious abuse, and just breaking one due to the normal application of a lot of torque. If you find the standard 6 speed to be deficient, you will have hopefully saved enough money to get it rebuild with an uprated gearset.
Paul