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jsr · 10.02.2009, 01:07 AM

You want to power the motor so that it spins in the 30k to 40k rpm range. The higher kV motors tend to like to spin faster (35k to 40k) while the lower kV ones work well spinning a bit slower (28k to 35k). The smaller motors (36x50mm size) will spin even faster (50-60k being ok for them as long as the bearings hold).
With a 1350kV motor, you NEED 6s. You can get it to work ok on 5s, but you NEED 6s if you really want to run that motor in it's sweet spot.
IMO the 2250kV is perfect on 4s. On 4s, it's spinning at 33k rpm...perfect! And your E-Maxx will absolutely fly! Gear it slow (30mph) if you run the 2250kV on NiMH. With 4s LiPo, depending on the discharge capability of your packs (not the C rating, but the actual discharge capability), you should be able to plenty fast.
If you still don't like the 1350kV, I'm looking for one. Let me know if you'd be interested in selling it.

	(#18)
jsr RC-Monster Carbon Fiber Offline Posts: 212 Join Date: Feb 2009	10.02.2009, 01:07 AM You want to power the motor so that it spins in the 30k to 40k rpm range. The higher kV motors tend to like to spin faster (35k to 40k) while the lower kV ones work well spinning a bit slower (28k to 35k). The smaller motors (36x50mm size) will spin even faster (50-60k being ok for them as long as the bearings hold). With a 1350kV motor, you NEED 6s. You can get it to work ok on 5s, but you NEED 6s if you really want to run that motor in it's sweet spot. IMO the 2250kV is perfect on 4s. On 4s, it's spinning at 33k rpm...perfect! And your E-Maxx will absolutely fly! Gear it slow (30mph) if you run the 2250kV on NiMH. With 4s LiPo, depending on the discharge capability of your packs (not the C rating, but the actual discharge capability), you should be able to plenty fast. If you still don't like the 1350kV, I'm looking for one. Let me know if you'd be interested in selling it.