ran a Nosram 7.5 with B4 gearbox on 26/78 @ Worksop with TP 32's 20c & Demon 35c saddle pack LiPo.
used approx 1200mah per 5 min race after with 1 lap either side of start & finish with 2wd. Expect to use half again in 4wd
the bigger C rating makes a hugh difference to the get up & go