Is this okay

[rchippie]

Is the gear ratio okay ?. Lehner 1950 8t hi amp with fp lipo's


Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 18
Total Voltage: 14.8
Motor KV: 1634
Tire Diameter (inches): 4.43
Tire Ballooning (inches): 0
Motor Current Draw: 60
Motor coil Ω: 0
Spur/Pinion Ratio: 2.56 : 1
Total Ratio: 8.45299 : 1
Tire Circumference (inches): 13.92 inches (353.5mm)
Total Motor Speed: 24183.2 RPM
Vehicle Speed: 37.7 MPH (60.57km/h)
Effective Speed Rate: 2.55mph/V (4.09kmh/V)
Effective KV Value: 1634
Motor Torque: 0.26 ft-lbs
Final Torque: 2.19 ft-lbs

[jhautz]

looks great. whats it on? esc? batteries? a little more info would be usefull in an evaluation.

[lincpimp]

I would say 5s would be better, motor speed is a bit low. However if it is in a buggy it should be ok.

[rchippie]

LINC

I understand 5s would be better for the 1950 but im not sure 5s would fit under the body. I would rather have a 1940 but i cant find one i can afford .

Jhautz

The esc is a MM the lipo's are flightpower all of this is in my jammin buggy.

[lincpimp]

I am sure a 5s 4000 pack (or something like that) would fit, but I do not know your intended setup. If you have the motor, esc, battery, etc go ahead. I am sure that it will be fine, you have good equipment there!

[rchippie]

Originally Posted by lincpimp

I am sure a 5s 4000 pack (or something like that) would fit, but I do not know your intended setup. If you have the motor, esc, battery, etc go ahead. I am sure that it will be fine, you have good equipment there!

I was only asking about the gear ratio i posted for the 1950 8t hi amp.

[jhautz]

Gear ratio looks fine...even a little conservative. You could probably go up a few teeth and still be fine, but that shold be great for a track setup.

[lincpimp]

Originally Posted by rchippie

I was only asking about the gear ratio i posted for the 1950 8t hi amp.

Ok, your gear ratio is too high for that motor to run most effeciently.

[rchippie]

Originally Posted by lincpimp

Ok, your gear ratio is too high for that motor to run most effeciently.

I have a 15t on it know . what would you recomend ?. I got beat by a stinkin 9L last weekend . We used GPS i topped out at 31.7 while skellyo's mbx5 & 9L went 41.3 .

[skellyo]

Originally Posted by rchippie

I have a 15t on it know . what would you recomend ?. I got beat by a stinkin 9L last weekend . We used GPS i topped out at 31.7 while skellyo's mbx5 & 9L went 41.3 .

No, no, no...it was 43.4mph

Although, I do believe the MBX5 is going to be torn down here shortly and donate its MM ESC to the CRT.

[rchippie]

Originally Posted by skellyo

No, no, no...it was 43.4mph

Although, I do believe the MBX5 is going to be torn down here shortly and donate its MM ESC to the CRT.

there is no need to rub it in .

[lincpimp]

I would say that the motor should make plenty of torque, just gear it up until something gets too hot! Keep an eye on the temps and you should be ok. I see no reason why 18/36 will give you any issues. You just have to make up for the lower motor speed with higher gearing. Not the best way, but most certainly cheaper than a new esc and batteries. Now if you were trying to get 50mph out of that setup you may have issues, but 40mph sounds realistic and definately do-able.