Recent content by steven mosher

My son races small cars that are direct drive. An engine, engine gear, chain, and axel gear. Since there is no shifting finding the right gear ratio is critcial to the speed of the car. By examining the dyno reports on the engine and through trial and error you can determine the best gear...

Thanks Krab, yOU'VE BEEN VERY HELPFUL

Here's how In most level coast down tests you bring the vehicle up to a given speed, then coast down. in most vehicles the engine is not connected directly to the rear axel. In the vehicle I am testing. 1. there is no speedometer. 2. The rear axel is connected directly to the engine...

add these constraints The vehicle is not powered. more precisely the transmission is direct drive.. so a coast down test on a level surface, I suspect, would be complicated by the fact that the transmsission losses would be factored into the decleration. since the rear axel is directly coupled...

Is there a simple way to estimate the rolling resistance of a vehicle by rolling it down a known incline with a variety of weights? In short, if the velocity of a vehicle rolling down a ramp is a function of the air resistance and the rolling resistance and if rolling resitence is...

Thanks Guys Flywheel modifications are not allowed in this stock clas; however, it is possible to work with lighter gears ( reducing rotating mass) on the engine. My understanding is that this type of modification would go to acceleration only

Thanks a ton You just saved me 675 dollars!

I need to know whether to invest in a new lighter axel for a go kart Before I take the plunge, I'd like to get "some" kind of idea of the kinds of gains one can expect from this kind of change. The conditions as I know Them. the 5Hp engine achieves max torque at 5200-5400 RPM...