Quote:
datsik wrote:
I think what crispdollaz is saying is : given the two engines specified, were put into cars with identical ratioed diffs, and if both have a gearboxes with ratios which meant that at max rpm both cars had the same velocity, the forces the diffs would see would be identicall, because the high revving motor would need to be have a large reduction in speed. this large reduction increases the torque at the tailshaft.
the only time more torque is true...is if both engines have gearboxes with equal gear ratios.
datsik gets me.
I guess my understanding is slightly swayed then from this discussion. I suppose horsepower alone may be misleading, depending on what sort of an engine we're talking about - diesel truck engine, 4cyl motorcycle engine, etc. However I do believe that torque ALONE is just as misleading as horsepower; in literature you'll find the terminology is intermixed when describing the need for a beefier diff because you have "more power".
I think the Tech Wiki might need to be updated to at least include a reference to gear ratio alongside the engine peak torque, if its agreeable that engine torque alone does not dictate the torque found in the driveshaft.
I like that we've also discussed "tramping" (although I've never heard it described with that term) - I race shifter karts and here we have a similar problem... however since there is nothing but wheels, a hollow axle, chain, and transmission, this instant torque caused by an engine spool when the drivetrain bounces can cause CRANKSHAFT shearing!
Thanks for the discussion!
Transfer
