MBX5-T brushless, farewell maxx

[wallot]

I have punch to maximum (punch control to OFF). i was told by long time 10th scale electric racers that takins are bit lazy. Dont know if its ESC or the motor. Will see on saturday. Most of the Laziness can be eliminated by setting the most aggressive throttle profile on the ESC along with the help of EXPonential on the radio. Would be nice to have all the throttle curve adjustability that 4PK offers but I dont like the huge futaba receivers that have overheating issues (at least older 603 ones, dont know if the new 604 that come with 4PK are better)

With MGM and Neu i did not have to deal with this. Deafult settings and I had all the power I needed.

Maybe playing with timing would help but i am lazy to drag laptop to the track but I expect less hassle from electric than from my nitro buggy.

More practice track time will help sorting this out, but with the little pracitce i can get i need to focus more on nitro as there is not much electric 1/8 scale competition

[florianz]

what timing did you use? timing has a big effect on the performance. higher timing must not cause a much hotter motor, but by far better performance. just try out. every motor has it's ideal timing.

I have a losi 1700kv 4pole motor, and there's a big difference between 1 and 7 degrees timing.

just take the tekin, try out a higher timing step by step and I bet that you're surprised... I just can't believe that tekin/neu makes such weak motors.

[wallot]

I use default timing on the RX8 which is 10
I never said Tekin has not enough power its just lazy = the throttle curve is not linear as with Neu. neu will pull from standstill to maximum rpm smoothly. Tekin needs some time to spool up from low to mid rpms.

The start on Tekin is great but the acceleration is not what I need when exiting corner (mid corner exit whe I go from low to mid rpm). Sure this I can overcome by hitting throttle harder but then i would risk hitting it too hard and spinning tires.

This is how the motor response feels

[florianz]

ok, I understand, interesting.

maybe you can compensate it with 15deg. timing?

[wallot]

5:14am and I am leaving for todays race. have hotwire with me so we will see

[wallot]

As expected Neu power delivery was smooth. Much easier to drive with compared to T8. After 9 minutes of runtime motor was 60C (140F) with outside temps around 30C (86F). ESC without fan was 45C (113F) at heatsink. I am very happy with this setup as it allowed me to run very consistent lap times (car no. 2).

Caliber VTR M2 worked great on hard packed very abrassive track. Much better than Revolvers VTR M2 to my surprise.

We did run qualifiers along with Nitro truggies and they stood no chance.

Talk to Randy Pike. I got to drive his electric MBX 5 a few months ago. And it wasnt lazy.

Im sure you can get it to be a beast off the line. Most people dont want a ton of punch, but im sure you can dial it in

[wallot]

It is beast off the line but there is a hole when going from low to mid RPMs then its beast again. It should be possible to eliminate the hole for example with Futaba 4PK and its throttle profiles but just RX8 profiles along with EXP on my DX3R did not help. Also couple fellow racers feell it the same and they played with timing.

However I am staying with neu. Runs cooler, linear power without any tunning and is over 50grams lighter.

[emaxxnitro]

Originally Posted by wallot

It is beast off the line but there is a hole when going from low to mid RPMs then its beast again. It should be possible to eliminate the hole for example with Futaba 4PK and its throttle profiles but just RX8 profiles along with EXP on my DX3R did not help. Also couple fellow racers feell it the same and they played with timing.

However I am staying with neu. Runs cooler, linear power without any tunning and is over 50grams lighter.

sensored motors just dont have the kick ass speed you need to get out of the corner? did you try the tekin without the sensor?

[wallot]

thats a good idea. did not try it as i though tekin switches from sensored to sensorless mode at much lower RPMs but the hole might be caused by the switch.

[wallot]

anyway NEU 1415 is great little motor. It was cooler than Tekin. Like the closed can.

Never run 1515 but it has at least as much power as 1512, however it is hard to tell on the track as not much power is really needed.

Based on W info on Neu site it is between 1512 and 1515.

[BL_RV0]

Nice job on the race Radek!