Hi guys
Just some info. I became more and more interested in trying 5 cells after reading all this, so yesterday I tried it. Normally I race in the modified class, but since my last race was a club race with 19turn, I kept that motor in the car.
I had 3 old packs with 1 broken cell I could use for this test. The voltage of these cells are 1.207 - The cells I normally use and which I compare to is 1.251.
The only thing I changed was removing 1 cell from the pack. No further changes, so the only weight reduction was the 65grams from the cell.
First run out was only 0.3 sek slower pr lap than with 6 cells, overall after 5 min was 6 sek slower. - After the race the motor was a lot cooler than usual.
Next battery I tried to gear up 2 teeths on the pinion, and the result was amazing. A lot of the speed was back, and the best lap time was only 0.1 sec slower than with 6 cells, and remember these cells were still lower volt and higher resistance than my normal cells. - After 5 min of racing the overall time was 3 sec slower than with 6 cells!
It was really funny to try this experiment, and next time I will try the same with a modified motor. The other drivers were quite amazed about the small difference in lap times, and so was I actually. And now I have 2 different places to install my batteries, back and forth
Try it guys, its quite fun
Søren