Losi 2.0 Conversion

[Shark413]

Originally Posted by Hardstyle

Sweet build. Everything is nice and shiny. Can I ask how much have you spend on this now? Buggys has always been interest of mine..

A lot of $$$.. I used a discount coupon on the Losi 2.0, and another for the MMM, so I saved a few bucks, but it still not cheap. This will be my 5th buggy conversion, I have learned a lot with each build, so hopefully the Losi will turn out ok.

[Hardstyle]

Originally Posted by Shark413

A lot of $$$.. I used a discount coupon on the Losi 2.0, and another for the MMM, so I saved a few bucks, but it still not cheap.

Yeah, fair enough. I guess I will figure the costs when/if im converting one . We'll see, these are very tempting right now..

[Shark413]

Another update: I have added the radio tray and steering servo, optional aluminum servo saver arm, losi servo horn and a King Headz steering plate. I have a Losi hard case battery in the first picture, it's a pretty big battery much bigger than the Neu or Zippy.


Losi battery



Neu battery


Losi on top, Zippy in the middle Neu on the bottom all are 25C 4S lipo's.

looks great , it looks very well balanced


let us know how the motor does on the track , i am torn between the 2200kv and this one , once you get the gearing figured out , also run-time and such on the 5k packs

[Shark413]

My new tap arrived, so I drilled out two of the holes on the Castle Creations MMM motor and tapped them out to M4 size. Mounted the motor using M4 screws, modded the rear mount to fit the MMM motor. Now everything is rock solid.


MMM 2650kv motor endbell, nice sharp tap and the proper size drill.


Drilling out the holes, the material was pretty tough, I hope they are using 7075 aluminum.


Holes tapped, now I am checking to see what length screws I should be using, too short and they don't thread in far enough and can strip out, too long and they will hit the coils inside the motor. Notice how close the new M4 holes come to the inner alignment ring, just made it. Also, the bearing is gigantic.


This is why I went thru all the trouble of tapping the holes, M3 screw on the left, M4 in the middle and on the right.


All done, absolutely no flex in the mount now. M4's look nice sitting in the mounting plate.

[Shark413]

Almost done, hooked up all the electrical stuff, shortened the motor wire, installed the ESC and rx. Hooked up a battery and tested it out on the work bench, everything worked great. I am used to running metal on metal (spur/pinion) but this is the loudest brushless conversion I have ever run. My ears are still ringing. I Won't be able to get to the track until next week, got pre-SuperBowl parties Saturday and Superbowl Sunday going on this weekend. Also, still need to paint the body.

[Shark413]

Rains finally let up and I got my Losi 8ight-E out on the track for the first time last weekend. Running a Smart diff in the center and a MMM 2650kv motor. Ran three packs to get things broken in, then three more to see what it could do. This thing is amazing, the handling is much better than my previous buggies and really suits my driving style. The Smart diff seems to be doing the job (definitely more on power traction), but I never ran the standard Losi diff, so I can't do a direct comparison. But compared to my brushless SH Z-Car and Kyosho buggy it does seem to accellerate under power better. I just hope the Smart diff spider gears hold up, they are pretty small and the motor has a lot of torque. I tried several different pinions with an Eagle Tree data logger hooked up to check Amps, Watts, temps, etc. With a 13T pinion and 45T sput, the motor temps were 128 degrees (max) and battery about 105 degrees (ambient temps were mid 60's) after 12 mins of driving at race speeds. I also tried a 12T, 14T and 15T pinion, but unfortunetly my Eagle tree didin't record the data (user error). So I will need to retest. I was using a Zippy, Losi and Neu 4s 5000mah batteries.

[Shark413]

Well I got the buggy out a few times to the track and I have been very pleased with the quality/durabilty of the Losi conversion. One thing that I am still having trouble with is motor temps, I again tried several pinions with my Eagle Tree hooked up and the lowest temps I got after 10 mins was 150 degrees which seemed on the warm side. So I decided to use a 47T spur which is closer to the stock buggy gearing (48T), instead of the Losi conversions 45T spur. This should give me a few more gearing options. I bascially had to open the hole in the plastic spacer a little bit and grind off a little area under the spacer (there is already a milled out area under the plastic spacer).




Using a Robinson Racing wide gear which is easier on the pinions because they are slighty wider and have more surface area.


Hard to see, but I opened up the hole in the plastic spacer and milled out a small area under the spacer.