RC-Monster Forums - View Single Post - Possible to change gear ratio in a losi 8ight truggy?

Matthew_Armeni · 09.30.2008, 02:19 PM

You can run the 1.5D on the Tekno, I think your estimated top speed is a little high.
Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 13
Total Voltage: 14.8
Motor KV: 2700
Tire Diameter (inches): 5.8
Tire Ballooning (inches): .2
Motor Current Draw: 0
Motor coil Ω: 0.004
Spur/Pinion Ratio: 3.69 : 1
Total Ratio: 15.87692 : 1
Tire Circumference (inches): 19.48 inches (494.74 mm)
Total Motor Speed: 39960 RPM
Vehicle Speed: 46.42 mph (74.57 km/h)
Estimated Adjusted Speed: 44 mph (70 km/h) - 6% loss
Effective KV Value: 2700
KT constant: 0.5 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

That's what I got when I put it in the calculator. Also, you can get the 50T spur gear that Losi makes, that will also lower the top speed a bit.

But if you are looking to get a different motor to run on 4s don't get the 2.5D, that will be too slow. The 1Y or the 2D will work better, but you'll prolly have to go to a 14t bell with the 2D.

Also, only Revo type bells work with the Tekno kit.

	(#4)
Matthew_Armeni RC-Monster Carbon Fiber Offline Posts: 305 Join Date: Sep 2007 Location: San Diego, CA	09.30.2008, 02:19 PM You can run the 1.5D on the Tekno, I think your estimated top speed is a little high. Differential Ratio: 4.3 Transmission Ratio: 1 Other Ratio: 1 Spur Tooth Count: 48 Pinion Tooth Count: 13 Total Voltage: 14.8 Motor KV: 2700 Tire Diameter (inches): 5.8 Tire Ballooning (inches): .2 Motor Current Draw: 0 Motor coil Ω: 0.004 Spur/Pinion Ratio: 3.69 : 1 Total Ratio: 15.87692 : 1 Tire Circumference (inches): 19.48 inches (494.74 mm) Total Motor Speed: 39960 RPM Vehicle Speed: 46.42 mph (74.57 km/h) Estimated Adjusted Speed: 44 mph (70 km/h) - 6% loss Effective KV Value: 2700 KT constant: 0.5 oz-in/A Motor Torque: Amperage not specified... Final Torque: Amperage not specified... Final Power: Amperage not specified... That's what I got when I put it in the calculator. Also, you can get the 50T spur gear that Losi makes, that will also lower the top speed a bit. But if you are looking to get a different motor to run on 4s don't get the 2.5D, that will be too slow. The 1Y or the 2D will work better, but you'll prolly have to go to a 14t bell with the 2D. Also, only Revo type bells work with the Tekno kit.