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lincpimp
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Posts: 11,935
Join Date: Aug 2007
Location: Slidell, LA
01.04.2011, 11:20 PM

Gearing time!!!

So I plan to use the 1717 motor. Got it to fit perfectly on an old flm electric motor mount, the one designed to bolt to a nitro savage motor plate. Thats right, no cutting or anything, bolts right on and just touches the bottom of the bracket, no flex!!! I do not see this part on flm anymore, but I will take pics for you guys!

Plan to use a 47t steel spur and a 16t rcm pinion. I have enough room to fit that without the pinion contacting with the side of the tvp, and there is enough sliding adjustment in the nitro motor plate to get good mesh.

Now with that gearing and a std flux tranny this thing would be slow. So I just picked up the 39t idler kit. Basically the flux is locked in 1st gear (old savvy 2sp nitro tranny) and the 39t idler kit locks it in 2nd gear, 1.54:1 reduction. That with the 29/9 of the bullet proof diffs should give me right around 45mph with 6.5" tall tires.

Also bought the HD input gear cluster for the flux, as those wear from what I have heard. Keep in mind my only other savage was a 25 with a 14xl on 8s lipo with a 2sp and mech brakes. Never could keep a diff in it for long.

Calc:

Differential Ratio: 3.2222222222222223 - BP diffs
Transmission Ratio: 1.5366847826086955 - 39t idler with 23t top gear
Other Ratio: 1
Spur Tooth Count: 47 - stock X ss spur
Pinion Tooth Count: 16 - rcm pinion
Total Voltage: 22.20
Motor KV: 1580 - 1717
Tire Diameter (inches): 6.5 - average of what I may run
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.94 : 1
Total Ratio: 14.54515 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Rollout: 1.40:1
Total Motor Speed: 35076 RPM
Vehicle Speed: 46.63 mph (74.91 km/h)
Effective KV Value: 1580

Thoughts? Not going to be a 5t but it will be a big bad MT...
   
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