You guys either have some HORRIBLE cells, a poorly maintained motor, or you are geared WAY to high. I've never really seen someone dump in 1/12th stock with GP3300s.
remember, pretty much all cells are set at a 30 amp discharge when matched, so you typically see cells from around 390-420 or so. 1/12th stock is more like 25 amps, not to mention yer not on the throttle the whole race....
My advice, check your motor and gear down.
Later EddieO