Increase Motor KV or # of lipos

[r1wheel]

Hi,

Not sure which way to go? I want more speed, current setup 29" cat, KB45XL(1000kV) running on 6s with X648 prop, am getting just over 50mph.
Temps are OK and pulling 90A average, 130A peak.

I am now aiming for 60mph, is it possible with a 29" cat? If so do i keep the current setup and increase from 6s to 8s or change the motor from 1000kv to maybe 1200kV.

Thanks

[domwilson]

What cat hull are you running?

[r1wheel]

Hi,

I am running this cat:

http://cgi.ebay.com.au/29-Phantom-catamaran-cat-ele-nitro-speed-race-rc-boat_W0QQitemZ140341407449QQcmdZViewItemQQptZRadio_Control_Vehicles?hash=item20acffeed9&_trksid=p3911.c0.m14

[txboatpilot]

Try running 8s... I run a 6s Hydro with 1250-1500KV motors and a 8s Cat with 1020KV,, both will run easy 60mph...

With a boat that size and wieght,, you will not pull too many amps on 8s1p.. You might want to prop down a little for the first run.. X648 should have you over 60 for sure!

[DISAR]

Also depends on what you have available, ESC for 8s? 4s lipos each for 130A discharge?
If you do not have these maybe it is cheaper to buy a 1250-1500 kv motor, starting with smaller props.
Txboatpilot's reply is very helpful since he already has these setups, depends on your available items and budget

[Jeff Wohlt]

I also say step the KV up a bit and stay with 6S. 29" hull should be no problem getting to 60. Prop down a bit and let her spin. The cheaper way to go. You also do not need a KB45 amp hog to do it.