B-Max4 Spur/Pinion + ESC/Motor + Battery + Runtime + Heat

[yokomobmax4]

Hi guys, I am seriously struggeling to get a proper setup on my B-Max4. The problem is that I seem to overheat my motor + ESC or don't have enough end-speed or acceleration ... or have a very low runtime. I tried many ESCs, motors, Pinion/Spur combinations, etc. But rather than continuing testing potential setups, I thought getting some help from you would be quite worthwhile ... ;-)

For now, this is what I have available (or can make available via my buddies):

ESCs:
- Castle Mamba Max
- Carson Dragster Pro
- LRP A.I. Brushless Pro Revers

Brushless-Motors:
- Carson 6.5T (4850 kv)
- 5.5 T (5800 kv)
- Castle Mamba 6 T (6900 kv)
- Nosram Storm Evo 4.5 T (7800 kv)

LiPo-Batteries:
- LRP 4800 (40 C)
- Reedy 4200 (35 C)

Well, if you could give me some indication of what of the above I should set up (ESC+Motor + Pinion/Spur) .... or even better, just let me know your setup so that I can try the same or something similar (buying new stuff is not an issue ;-)

Thanks a lot. Cheers, Oli

PS:
a) I literally melted a Carson ESC by running Reedy 4200 + Carson ESC + 5.5 T (5800 kv) on 17/87 (Spur/Pinion)
b) With the Castle setup (ESC + Motor) on 19/87 I stopped when I had 111 C on Motor + 100 C on ESC. Isn't that far too hot?

[chokoboy]

I had a similar problem with my b-max...try to reshimm it with some thinner shims, use 12mm 01 instead of the original 12mm 02 shims and the same with the 8mm shims.......

[hardrider]

I've been running my Bmax with the following with no problems on my track.
Tekin RS Pro esc
Tekin Redline 8.5 motor 87/18
Tekin Redline 6.5 motor 87/16

Temp was as follows after about 8mins of runtime:
Esc: About 65 deg C
Motor: About 70 deg C
Batteries: About 40 deg C

I started with the 6.5 but eventually ran the 8.5 because the power was a little too wild for my liking.

It looks like your ratios are a little on the hot side.
You might want to check on your pinion/spur mesh as well. The covered gearbox may sometimes make meshing hard to inspect.

Hope this helps.