LOSI LST XXL Conversion ideas

[nitrostarter]

MC! Great job there! Nice finish on the chassis and battery boxes!!

I didn't see where you stated your gear ratio.

I'm not sure what kind of top speed you are looking for but here is how I ran my 1521/1Y 6s powered LST XXL:

Differential Ratio: 3.3076923076923075
Transmission Ratio: 2.090909090909091
Other Ratio: 1
Spur Tooth Count: 63
Pinion Tooth Count: 26
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.42 : 1
Total Ratio: 16.7582 : 1
Tire Circumference (inches): 20.73 inches (526.66 mm)
Rollout: 1.24:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 41.02 mph (65.89 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

This was pretty quick for the LST and it's "MT" handling. Maybe your gearing is off? Not sure...

[mistercrash]

I think the E-Revo tranny I am using throws the data a bit. I have a 58 spur and a 22 pinion on right now. But I was also running lipos that were almost empty and the LVC kicked in after only 7 or 8 minutes of running easy. I only did one top speed run, maybe the voltage was just too low. I'll recharge the batteries and try again before I start playing with gearing. I might have to get other pinions from Mike as the biggest one I have is a 22. Going to nitro Revo spurs with matching pinions might be another option. But I don't think I'll have to go that route.

What springs were you running?

This is what I get from what's in the truck right now so it should've been more than adequate. As you can see, the E-Revo tranny ratio is very different from yours. I also chose the XXL tire option which is larger than what you have on your info. There's also a big difference in roll out from yours.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.8333333333333333
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 22
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.64 : 1
Total Ratio: 15.98718 : 1
Tire Circumference (inches): 21.21 inches (538.63 mm)
Rollout: 1.33:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 43.97 mph (70.64 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A

This is what I get if I choose the same size tires as yours. It still shows plenty of top speed.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.8333333333333333
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 22
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.64 : 1
Total Ratio: 15.98718 : 1
Tire Circumference (inches): 20.73 inches (526.66 mm)
Rollout: 1.30:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 43 mph (69.07 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A