A quick gearing calculation with the 2:1 hub plus subaru stuff gives a 27.65 ratio in 1st HI,and a 44.02 ratio in 1st low.
with 33" tires
it would go 1.67 MPH at idle in 1st LO
3 MPH in 1st HI at idle
65 MPH at 4000 RPM in 5th HI
The gear reduction box would use #60 chain.The top sprocket would be 9 teeth and the bottom would be 18. The box would be roughly 9" tall and 1 1/2" wide.The top sprocket would attach some how to the axle.The bottom sprocket would transmit the power to the subaru hubs.
At stock ride height (no suspension lift) with the reduction box in place and 33" tires it would give a theoretical ground clearance of 33.5".
Then because the reduction box would be after the axles, the axles would be stressed just as much as normal.
I'm kinda Hung up on if the chain will be strong enough.I plan to use #60 chain.The chain is 1/2 wide(the area that the sprocket contacts).
Im just kinda wondering if it will hold up to 33" tires and an EA81.If it will there are several companies in lewiston that sell gears.So it probably wouldn't be too hard to rig up a prototype..
to make it work I would need the splined section from a subaru hub for the axle to go into,and then a outer CV cup to go into the vehicle hub.
It doesnt seem like it would be hard to make: some chain,two gears,method of connecting unit to car,metal for the housing..
I wonder if an EA81 would even have enough snot to turn 33" tires in 1st gear+ 2:1 reduction.. at least enough to get started in town..
Edited by Uberoo, 18 January 2010 - 12:31 AM.