Sequential Gearbox
Discussion
Gadgeroonie said:
sadly 500 nm is only about 360 lb/ft
barely enough for a standard noble
very neat little unit however - might be worth chasing up to see if they can do a stronger version
for now the gearboxman box still seems the best solution
I've already asked if there are plans to increase the capabilities of the box so should get a reply monday.barely enough for a standard noble
very neat little unit however - might be worth chasing up to see if they can do a stronger version
for now the gearboxman box still seems the best solution
Gearbox man isn't really anything other than a short term solution though as there have been more breaking while running on low boost 420lb/ft, we need a stronger box/gear set and my car won't be back on the road till I'm satisfied it's going to handle 500lb/ft day in day out.
"Gearbox man isn't really anything other than a short term solution though as there have been more breaking while running on low boost 420lb/ft, we need a stronger box/gear set and my car won't be back on the road till I'm satisfied it's going to handle 500lb/ft day in day out. "
did anyone find out what failed ?
did anyone find out what failed ?
andygtt said:
I want a box that takes 650ftlb... i'm only actually going to run 550-600ftlb but want a safety margin.
wonder what the new audi dsg box's can do... Id take a 50kgs weight hit for .4s improvement in acceleration on each gearchange
whats that box i saw on the Jetsteam race car? the one where they rotated the engine, is that the box they used on the M15, are'nt they any good?wonder what the new audi dsg box's can do... Id take a 50kgs weight hit for .4s improvement in acceleration on each gearchange
Gadgeroonie said:
Might be worth investigating cryogenic freezing to see if it will strengthen the splines.
Does anyone have any photos of a failed and new shaft
On mine the splines that control 5th had completely sheared off, all of them.Does anyone have any photos of a failed and new shaft
I am looking at what the possibility is of making a new shaft and spline but retaining the same gears, but using a stronger material for the shaft and spline, ie tungsten, titanium, even carbon steel, just investigating to see what choices if any would work, problem being contraction and expansion if you are combining different materials. Purely as a experiment just to see what options there may be again if any, but if you don't look you don't find. Something will turn up I'm sure.
Gadgeroonie said:
sadly 500 nm is only about 360 lb/ft
barely enough for a standard noble
very neat little unit however - might be worth chasing up to see if they can do a stronger version
for now the gearboxman box still seems the best solution
500Nm = 369lb/ft.barely enough for a standard noble
very neat little unit however - might be worth chasing up to see if they can do a stronger version
for now the gearboxman box still seems the best solution
As I said, this is it's initial rating, what it will actually put up with will be higher, just at this time that's all it's being warranted for.
the issue here is that there are very few transverse sequentials that have higher torque capacities, and even then, they are HUGE and probably too long to fit.
Realistically, how much torque are you making? and by this I mean in the car and able to put down on the road without wheelspin?
if the std box (with gearsets etc) can almost cope, then I am pretty confident that this box is considerably stronger than that.
Here's some pics of the internals:
By Gearboxman, do you mean Berni?
Edited by Scuffers on Saturday 4th August 22:57
Blu3R said:
There are a number of cars that I can think of that output around 700-750Nm of torque.
Genuinely? (as in calibrated engine dyno'ed numbers?)and if they are, can they actually put that down without lighting up the rears?
Torque on the gearbox is really the reaction of tyre grip to the engine as opposed to what the engine may be capable of.
I would suggest that unless your on some pretty impressive slicks, your not going to be able to use 700-750Nm without breaking traction (or at least till your in high gears).
out of interest, what's the size and spacing of the gears you use now?
Box is ~£12k start price, Geartronics shifter system is ~£3K (+ wiring etc)
obviously, a new front section will need to be designed made (easy enough) to mount to the V6, would need to look at the flywheel/clutch setup (spacing/splines etc), then fabricate some mounts up (easy enough), and finally, come up with some drive-shafts etc.
Just so I can get my head round this, what gearbox are you currently running, with what driveshafts and joints?
obviously, a new front section will need to be designed made (easy enough) to mount to the V6, would need to look at the flywheel/clutch setup (spacing/splines etc), then fabricate some mounts up (easy enough), and finally, come up with some drive-shafts etc.
Just so I can get my head round this, what gearbox are you currently running, with what driveshafts and joints?
sundance002 said:
On mine the splines that control 5th had completely sheared off, all of them.
I am looking at what the possibility is of making a new shaft and spline but retaining the same gears, but using a stronger material for the shaft and spline, ie tungsten, titanium, even carbon steel, just investigating to see what choices if any would work, problem being contraction and expansion if you are combining different materials. Purely as a experiment just to see what options there may be again if any, but if you don't look you don't find. Something will turn up I'm sure.
might be worth considering getting a new shaft and cryo treating it - if it works then you have solved the problem for us all. I will do some research and see if there are any stats on increases in strengthI am looking at what the possibility is of making a new shaft and spline but retaining the same gears, but using a stronger material for the shaft and spline, ie tungsten, titanium, even carbon steel, just investigating to see what choices if any would work, problem being contraction and expansion if you are combining different materials. Purely as a experiment just to see what options there may be again if any, but if you don't look you don't find. Something will turn up I'm sure.
alternatively you may be able to weld 5th gear onto the shaft using electron beam welding, very precise and gets good depth of weld
it may also be possible to weld a collar over the 5th gear splines of the failed shaft and then machine the gear to fit the collar
i can recommend a company to do custom gears if you want to pm me
sundance - do you have any pics of the failure ? did it happen after a gearchange or a loss of traction ie a shock loading
yes the gearbox man is berni
Gadgeroonie said:
sundance - do you have any pics of the failure ? did it happen after a gearchange or a loss of traction ie a shock loading
yes the gearbox man is berni
It happened after running over big kerbs with rebound on full...i would say shock loading..yes the gearbox man is berni
Personally it seems to me that these current boxes are fine as any up to 500lb/ft, when upgraded..!! and without shock loading.
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