Not sure where to post micro-t stuff...

[olds97_lss]

So, is 850mah too much run time for stock electronics on this thing? I got about 5 minutes or so into my first run after installing AAA's and it just stopped. It would still steer, but no forward/reverse. So, I shut it off for a few minutes, turned it back on and it seems fine. I tempted the motor can and it was at 140F. The batteries were at 85F (just charged them for the first time) and the top of the esc/receiver was 90F.

Yeah... I know it looks stupid, but since I pretty much just futz around with it in my house, chasing cats, I really don't care how it looks. I just want to be able to run longer between charges.

 

[beason]

is the esc under all that tape? it may be overheating from lack of airflow?

i havent looked at mine in awhile, so i can't remember what the esc looks like.

 

[olds97_lss]

The esc is fully enclosed in plastic as part of the receiver. It's getting just as much airflow as before as I don't have the receiver actually taped up at all. There's a 1/2 inch gap between the top of the receiver and tape.

It did it again though. I ran it for 5-6 minutes (long bursts of WOT, 5+ seconds max) and it stopped responding again.

I temped the end bell of the motor, it was at 160F. By the time I grabbed the camera, it was down to 155:

The top of the esc was only at 90F.

Could be just the fact that the esc/motor is stock and I added a lot of weight to it with 4aaa's vs the 2/3aaa's. I haven't added bearings or anything yet.

 

[Lessen]

This sounds VERY similar to an experience I once had with my old M18. It turned out to be glazing of the brushes due to high heat caused by over-gearing. I'd be willing to bet the weight of those cells is to blame.

https://www.rcnitrotalk.com/forum/showthread.php?t=50651&highlight=glaze

 

[olds97_lss]

I had thought someone made a micro "big block" motor for the micro... I can't seem to find it now. I'm thinking about getting the raminator axles (with nuts vs e-clips) and wheels/tires to give me a bit more ground clearance. If I have an over gearing problem now... that will just make it worse. I don't feel like going brushless. Between the motor and esc w/servo and receiver package, I'm at more than I paid for the stupid truck new!

 

[Lessen]

I don't think it's the actual gearing, but rather the resistance. A car that is geared too high puts a lot of resistance on the drivetrain. In essence it makes the car seem heavier from the drivetrain perspective. I think the weight of your battery pack is causing the motor to get too hot because it's working extra hard to make the rpms that the ESC is telling it to make.

 

[beason]

i know i always had an issue with junk wrapping up around the axle on mine, you may have binding.. also the bearings make a BIG difference and they are cheep. check your trans as well. my case was to tight causing it to not spin freely. a pencil rubbed on the pinion with cut down on the friction there, and also make sure its not to tight.

you can flip the wheels around and make it a bit wider but it makes the e clips that much more of a pita.

 

[olds97_lss]

Well, I bought the axles that use a nut vs clips, ball bearings, Atomic BB II motor and raminator wheels/tires. $54 for a $80 rig... just doesn't seem right you know?!?!

I'm hoping the taller tires as well as the bearings will help the cat hair issue. If not, nuts vs clips on the axles should make for quicker cleanup.

 

[mxracer]

So now you have a Stadium Truggie kinda???:\

 

[olds97_lss]

Well... sure? I will have a mismosh of crap that was probably a total waste of money that I'll play with 2 or 3 times over the next 12 months... YAY RC IS FUN YAY!!!

 

[Lessen]

Well, I bought the axles that use a nut vs clips, ball bearings, Atomic BB II motor and raminator wheels/tires. $54 for a $80 rig... just doesn't seem right you know?!?!

I dunno man. It's not that bad. I think you're sort of selling yourself against it. I mean all of those parts in any other vehicle would add up to a significant amount vs. the respective rig as well.

Let's see... in my Lazer that stuff would be

~$85 motor
~$20 for tires
~$15 for wheels
~$20 for a bearing kit

=$140 in a $210 RTR rig :shrug:


Putting the brushless in there makes it completely different. You'll double the runtime without adding a lot of weight and it's quick as $hit but not tooo fast either. Let us know how you like the BB motor though. I'm curious

 

[mxracer]

Pics dude!!

 

[olds97_lss]

I dunno man. It's not that bad. I think you're sort of selling yourself against it. I mean all of those parts in any other vehicle would add up to a significant amount vs. the respective rig as well.

Let's see... in my Lazer that stuff would be

~$85 motor
~$20 for tires
~$15 for wheels
~$20 for a bearing kit

=$140 in a $210 RTR rig :shrug:


Putting the brushless in there makes it completely different. You'll double the runtime without adding a lot of weight and it's quick as $hit but not tooo fast either. Let us know how you like the BB motor though. I'm curious

Yeah, that's all understandable. I just was seeking a toy I could run around the house for 10-15 minutes at a time without issue. Unfortunately, I have to take the wheels off the axles every 5 minutes to clean out the stupid fuzz and hair.

IMHO, I think losi selling anything without full bearings is ridiculous. Same goes for axles that use nuts. I mean, aren't they supposed to be geared to the racing crowd? Shouldn't the quality and thought be put into all their rigs that they sell, like they do with their "racers"? I just thought it was lame, this day in age, that a respectable RC company doesn't set the bar a bit higher.

 

[Lessen]

IMHO, I think losi selling anything without full bearings is ridiculous. Same goes for axles that use nuts. I mean, aren't they supposed to be geared to the racing crowd? Shouldn't the quality and thought be put into all their rigs that they sell, like they do with their "racers"? I just thought it was lame, this day in age, that a respectable RC company doesn't set the bar a bit higher.

Well, the Micros certainly aren't marketed toward the hardcore racing crowd thus they are short on niceties. I'm sure they cut as many options from the RTR so they could get the retail price under $100. Losi seems to be pretty aggressive with their price points. I've been looking at the JRX-S Type-R TC and it's significantly less expensive than other 'premium' TCs on the market. I'm not sure what is not included that other kits might have but Losi sure wants there retail prices to be much lower than the competition. Might just work too, I might pick one up after the holiday season.

 

[olds97_lss]

Well... I've gone and done it... bearings, raminator tires/wheels, axles with nuts, atomic motor... now I need a longer chassis so I can run the raminator tires/wheels on all four corners.

Now I just need to figure out how to make something out of 5/16" steel rod for it so all my rigs match!

That said, anyone know of a good wheelie bar?

To combat heat, I drilled holes all over in the esc cover. Between that, gearing the motor down a couple teeth on the pinion, getting a better motor, adding the bearings, it will run and run now without shutting down. Only shut down on me twice so far. Both times due to screwing around on a blanket... thick, poofy, caused a lot of drag and extra effort. But, running around on carpet, 20+ minutes of run time. I have yet to run the pack down... but I also charge it before I run it, so I don't know the full run time yet.

I do know that it is far long enough to irritate my wife when she's watching her "stories"... and to completely exhaust the stupid cat who chases it. So, MISSION ACCOMPLISHED!!!

 

[Lessen]

now I need a longer chassis so I can run the raminator tires/wheels on all four corners.

Noooo! I think it looks BadA like it is. Now it just needs a sprint car body! That'd be slick as hell!

 

[RC Addict]

Noooo! I think it looks BadA like it is. Now it just needs a sprint car body! That'd be slick as hell!

Hell yes! That would look sick!

 

[hamz9561]

Well, I bit the bullet and bought a Micro Desert Truck and a LiPo/Charger set. It's a fun little beast and I think I'll get a brushless setup after Christmas. The cats hate it for some reason....

 

[olds97_lss]

Well, I figured since I'm on vaca that I might as well try and extend the chassis a bit. I used some light gauge steel and now I can fit raminator tires on the front! Lost wheelies though... it takes off like a scalded cat now. Before it would just flip on it's lid. I think the slipper is slipping on hard take offs now.

 

[mxracer]

Thats pretty sweet dude!! What are you going to call it???