Stock sedan on carpet w/foams:
I do the same as Jimmy. "Except" Before my first charge of the day I equalize the cells in a tray (no fan). I charge at 6 amps with a .03 and peak with same unless it is very soon after the initial charge I will peak with only a .01 cut off. I try to run my packs 2 times in a day with a good 1.5 + hour wait between runs. Basically practice with them and then qualify/race with them.
Mod sedan on carpet w/foams:
Same as above, but charge at 5 amps instead of 6. Sometimes I do not run the pack 2 times in a day. All depends on run time of the pack. On that second charge the pack loses a little run time, but voltage goes up and ir goes down. I do not always feel and see that slight loss, but if I am close on run time I will only run it 1 time to be safe. 7, 8, and 9 turns on the rug will dump any pack
Just my $.02. Give the Fukuyama Racing cells a shot. Awesome performance, awesome company, and an awesome price. There is nothing else.