Need info on how many mah's needed

[colormegone]

I have a few new 3300 mah 4S 35C lipos and will be running my Stiletto with a UL1 motor. Prop will most likely be a 42x55. Are these enough mah's for racing or would I need more? I use a 5000 mah's 2S 40C in my Short Course truck when racing for a 6 minute heat and it is plenty. It has a 8.5 turn brushless motor. Not sure about running in water since rc boat racing is new to me. I quess I'd be running in spec class tunnel
Thanks, Roy

[sailr]

3300 not enough! You'll cook it! You need a 4S 5000 unless you can squeeze two of those 3300's in there in parallel!

Your truck motor is GEARED. They don't pull many amps. Boats SUCK THE AMPS because water is a tough medium to run in....lots of resistance!

[colormegone]

Thanks, I thought it might not be enough.