Quote:
Originally Posted by asheck
James, are you mad man , am I on the right forum, you are only geared for around 65 on 2s. This is reality, and those kind of #'s never work out. You know, I logged my 2wd, and was surprised. I'm running a VXL esc with a sensored Novak 8.5 motor. Geared 17/87 for around 34mph, on 2s. I figured it to be a mild setup but it still pulls 93 amps. Averaged like 12. With a heavy throttle and the gearing you are running, I wouldn't be surprised if you pull more then I do with my Revo.
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Here is the 2s setup, not quite as fast as you figured?
Differential Ratio: 2.72
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 56
Pinion Tooth Count: 20
Total Voltage: 7.40
Motor KV: 3800
Tire Diameter (inches): 4.6
Tire Ballooning (inches): .2
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.8 : 1
Total Ratio: 7.616 : 1
Tire Circumference (inches): 15.71 inches (398.98 mm)
Rollout: 2.06:1
Total Motor Speed: 28120 RPM
Vehicle Speed:
54.92 mph
Now, geared back to what I had it on 3s:
Differential Ratio: 2.72
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 14
Total Voltage: 11.10
Motor KV: 3800
Tire Diameter (inches): 4.6
Tire Ballooning (inches): .2
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 4.14 : 1
Total Ratio: 11.26857 : 1
Tire Circumference (inches): 15.71 inches (398.98 mm)
Rollout: 1.39:1
Total Motor Speed: 42180 RPM
Vehicle Speed:
55.68 mph
I think I should gear it down, to around 45mph to cut down draw and parts breakage.
Differential Ratio: 2.72
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 12
Total Voltage: 11.10
Motor KV: 3800
Tire Diameter (inches): 4.6
Tire Ballooning (inches): .2
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 4.83 : 1
Total Ratio: 13.14667 : 1
Tire Circumference (inches): 15.71 inches (398.98 mm)
Rollout: 1.19:1
Total Motor Speed: 42180 RPM
Vehicle Speed:
47.73 mph
Quote:
Originally Posted by asheck
I really think this to be the case. The 3800mmp is a different combo. The Sidewinder 3800 is a great budget system,it functions correctly, the 3800 MMP is just a great system it does what I want it to do.
BTW I did the math, and going from the 2400 4s , to the 3800 2s , I lost 13.6 oz's. That in it's self, to me seems quite significant in a 5lb vehicle.
Here's a little sample run of what 4s was like. It had a little more weight then I was used to. http://www.youtube.com/watch?v=7X7LXyP3J2w I never hit more then 3/4 throttle in the vid |
I think the 3800 and MM on 3s will be the ticket for my pede. Geared as above for around 45mph.
I do think my sidewinder esc has taken a dump. It needs a kick as the esc will not startup at all. Once it gets rolling it will move fine. So I guess my testing was a bit of a waste, save for motor temps. The 1410 is a beat, I may take your lead and run it in the pede 4x4 on 3s lipo with a MMpro. The 36/301.5y aveox on 4s is a potent setup, and with the 4500 lipo the truck is getting very heavy.