4-Tec conversion

[lincpimp]

Originally Posted by magman

Looks good...it should really go

Thanks, I ran the numbers on the calc, here are the 5s results:

Differential Ratio: 1
Transmission Ratio: 1.7
Other Ratio: 1
Spur Tooth Count: 41
Pinion Tooth Count: 20
Total Voltage: 18.5
Motor KV: 1638
Tire Diameter (inches): 2.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 2.05 : 1
Total Ratio: 3.485 : 1
Tire Circumference (inches): 7.85 inches (199.49 mm)
Total Motor Speed: 30303 RPM
Vehicle Speed: 64.67 mph (103.88 km/h)

I will see how this works with the maxamps 2100 cells wired up as 5s. They are not bad cells, but I do not know if they can push out 750 watts...

I may swap the bk9920 out for a quark 125b and run 6s with the fp 2170 lipos. Here is the setup on 6s:

Differential Ratio: 1
Transmission Ratio: 1.7
Other Ratio: 1
Spur Tooth Count: 41
Pinion Tooth Count: 20
Total Voltage: 22.2
Motor KV: 1638
Tire Diameter (inches): 2.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 2.05 : 1
Total Ratio: 3.485 : 1
Tire Circumference (inches): 7.85 inches (199.49 mm)
Total Motor Speed: 36363.6 RPM
Vehicle Speed: 77.61 mph (124.66 km/h)

And I can push the gearing up to a 25t pinion:

Differential Ratio: 1
Transmission Ratio: 1.7
Other Ratio: 1
Spur Tooth Count: 41
Pinion Tooth Count: 25
Total Voltage: 22.2
Motor KV: 1638
Tire Diameter (inches): 2.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 1.64 : 1
Total Ratio: 2.788 : 1
Tire Circumference (inches): 7.85 inches (199.49 mm)
Total Motor Speed: 36363.6 RPM
Vehicle Speed: 97.01 mph (155.83 km/h)

Not sure what kind of battery setup I will need to get that kind of speed. I doubt the 15l will handle it either.

I do have an aveox 2000kv motor, 1512 size. I am sure that it with a decent 90+ amp capable per cell 6s pack will do 100mph. I will have to whip up a 3200 30c 6s lipo, and use a MMM. This will be down the road, if the platform can even handle 80+mph.

Differential Ratio: 1
Transmission Ratio: 1.7
Other Ratio: 1
Spur Tooth Count: 41
Pinion Tooth Count: 25
Total Voltage: 22.2
Motor KV: 2000
Tire Diameter (inches): 2.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 1.64 : 1
Total Ratio: 2.788 : 1
Tire Circumference (inches): 7.85 inches (199.49 mm)
Total Motor Speed: 44400 RPM
Vehicle Speed: 118.44 mph (190.26 km/h)