ET2 Electric Massey

dh1 said:
E15 does not do as well as ET2 in the pulls for several reasons.
ET2 current configuration.
weighs 750lbs with me on it.
4 x group 51 12volt batteries, 48 volt system.
300 amp controller with foot pedal for speed control.
Briggs & Stratton Etek motor, 48volt, 3500rpm, 6hp continuous, 15hp peek.
#40 chain drive, motor to trany, 2 to 1 ratio, motor spins 2x, trany 1x. Chain drive is noisy.
I use 4th or 3rd gear, heavier the tractor or/and tougher the track 3rd gear
23 - 10.50 x 12 rear tires.
Click to expand...

Are the tires loaded?
 
So far this yr I have been to 3 Test and Tune days, taken the tractor down the track 20 or 25 times now with 3 different sleds, lots of practice.
At the pulls I usually get 2 pulls, 2 different weight classes, only 1 pull per class, so you make your best guess for that 1 pull, no moving weights or trying a different gear.
Video of a test and tune day.
 
CRF6179 said:
I noticed the last two runs you took the weight all the way to the top.
What changed from the earlier runs?
Click to expand...

Weight in the box never changed, there was a soft spot on the track that got worse as the day went on, if you got past it you went all the way down, or take a different path to go around it. Everybody got stopped in that spot so we moved over a bit.
 
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