Motor for 4s

[fastbaja5b]

Hey guys in my X1CR I have a MMM V3 speedy and a Medusa 36-60-2000V2-5 on 4s (2 * 2s) Reedy Lipos, with the 15t pinion the motor gets to 125 tops and Battery / ESC don't even get warm, but it feels like it's lacking top speed wise.

What are my options (our 1/8 electric class is expected to be restricted to 4s lipo)

[joeling]

Hi,

I have the same buggy with 4S PQ 6000mah lipo MMM & I'm using a Neu 1512 2600KV geared 13/48. Pretty fast & competitive. In fact, managed the fastest single lap at my local track ever in a field full of nitros at a race recently.

The setup I'm running also made the 20minutes main under hot & humid conditions of the tropics. Was running in third until a mechanical failure (bolt holding the ackerman went MIA, effectively losing steering to one of the front wheel) put me in 6th place in the A main.

Regards,
Joe Ling

[Unsullied_Spy]

The best way to speed it up would be to go up to 5s, that alone will speed it up quite a bit.

[fastbaja5b]

Originally Posted by Unsullied_Spy

The best way to speed it up would be to go up to 5s, that alone will speed it up quite a bit.

As stated in my opening post, we are restricted to 4s Lipo

[Unsullied_Spy]

Originally Posted by fastbaja5b

As stated in my opening post, we are restricted to 4s Lipo

Ahh, must've overlooked the bottom part.

The 2000KV 60mm is the highest KV you can get in the 60mm, you'd have to go up to a 70mm for higher. If you can get your hands on a CC 2650 that would probably be just right.

[George16]

Gear it up with a 16T pinion since your ESC/batt temps are barely warm like you said. It might even drop your motor temp.

[fastbaja5b]

Took it out last night, pig of a day, 7pm and temp was still 92f gave it a good 15 minute bash on lawn, hard stops, jumps, full throttle runs etc, ESC and Batteries came off arond 100-110 Motor peaked at 129 according to the temp loop on the can.

[magman]

Originally Posted by fastbaja5b

Took it out last night, pig of a day, 7pm and temp was still 92f gave it a good 15 minute bash on lawn, hard stops, jumps, full throttle runs etc, ESC and Batteries came off arond 100-110 Motor peaked at 129 according to the temp loop on the can.

Those are good temps. considering the temps. out side and running on grass, etc..

[Finnster]

I would just gearup 1st. You have plenty of headroom to load up the motor. I know on my 50mm in my Crt.5, it was a bit drowsy until I geared up enough, now its a fraking monster. Just keep track of lap times to see what works.

[rchippie]

Originally Posted by fastbaja5b

Hey guys in my X1CR I have a MMM V3 speedy and a Medusa 36-60-2000V2-5 on 4s (2 * 2s) Reedy Lipos, with the 15t pinion the motor gets to 125 tops and Battery / ESC don't even get warm, but it feels like it's lacking top speed wise.

What are my options (our 1/8 electric class is expected to be restricted to 4s lipo)

I run a NEU 1512-2d or 2550kv motor on 4s geared 12/46 with a MM esc in my X1CR .

[fastbaja5b]

I'm finding that the 2550-2600 kv motors people are gearing around 12/13t and it seems my current gearing is pretty right with the 16, even in these 100+ degree days I can go for a bash without any thermalling dramas :)