I think I've narrowed my possibilites down to getting custome driveshafts made.
I was originally talking with the local driveshaft shop about making a custom Tripod joint housing with a 6-bolt flange that is compatible with the type-2 VW (100mm CV) CV joint. This might work; in fact there are some made for Formula Atlantic class open wheel racecars. However, my thought is that this is a wear item - and custom machined and hardened wear items seem expensive in the long run.
Instead, if I eat the cost, I can get a pair of driveshafts that hold up to drag racing Eclipses - a more or less "stardard" commercial off-the shelf product. There will be a small change of using a 100mm CV on the inboard side rather than the standard Eclipse tripod joint. I'm getting quotes for that right now. The beauty of this setup is I'll probably never break the axles, and I have a source for quality replacement parts. If I manage to hot-rod the MGR to the point that the axles, break
there will be about two levels of upgrade axles already made that I can upgrade to.
Regarding the differential spline - sorry, this doesn't match any commonly available spline in a 'Yota pickup differentials. I've looked at all the stuff for pickups and asked around for that- hoping to fine a rock crawler spool or something. They're all bigger. If the ones used on a Supra or MR2 are similar, that would be great to know!
I have designed a spool/driveshaft/output flange for the MGR - it passes all the design requirement of "Engineer to Win" and I've done a FEA analysis of all the parts. It looks like it should have an infinite fatigue live when subjected to 1000 ft-lbs of torque. That's about 1.5 times the rated output of the MGR. I'm going to check costs tomorrow on that.
E*clipse
Quote:
Originally Posted by AlexanderB
I did see a video of a machine welding 2 shafts together, but they were pre-heated and slow-cooled and re-hardened after, if you just MIG it at home, they break right next to the weld. (Seen that happen so many times..)
(Machined from blank steel-) Custom shafts are not cheap, but theres companies that make them, some examples are already in this topic. its the best way if you have the money.
I'll be facing this dillemma soon, as my diesel gearbox will probably not survive long with the added torque a turbo, there's however a drop-in replacement gearbox that matches the engine bolts, clutch, flywheel, everything, but theres no axles that'll match my car to that gearbox. I heard rumors that certain axles would fit if I take the wheel hubs from that car and have them machined so they'll fit my wheel bearings.. We'll see.
But that brings me back on topic, the splines on the MGR side are not just the same ones Toyota puts on everything? that would make it somewhat easier perhaps, to find the correct length shafts. Machining down a set of Toyota wheel hubs to fit your wheel bearings is probably cheaper than custom shafts. |