Ultimate RC Home RC Forum RC Videos RC Photos RC Projects & others
Affiliate links:
Not a Member Yet? You're Missing Out!
Sign up in minutes for a free URC Network account and you'll be able to post in over 100+ forum categories, search over a decade of archived topics, exchange private messages with other members, upload pictures to the RC photo galleries, and much more!

Already have an account?
Sign in below!
Sign in:
Thread Tools
fubar's Avatar
"Experienced user"
fubar - 1.07.13, 5:29 pm Post #141: | Reply With Quote
Yep....ran the entire 4500mAh pack and the esc stayed cool, while the motor was only warm.

With the stock electronics and 9.6v 2000mAh pack, the motor was too hot to touch after the batt ran out...and of course you know what happened to the motherboard.

So your right, it's very efficient now.
"Experienced user"
Jean - 1.08.13, 7:24 pm Post #142: | Reply With Quote
Amazing work! That's progress! How come the motor ran cooler this time then with the old set up??
fubar's Avatar
"Experienced user"
fubar - 1.08.13, 8:34 pm Post #143: | Reply With Quote
Thanks Jean.

I think the reason the motor runs cooler now is probably based on a couple of factors. Last month, I phoned Tamiya down in Irvine and asked them what battery voltage they recommended I run the motor on.They said 7.2v.

Now, I had every intention to stick with 9.6v, but they said for max efficiency, 7.2v was the way to go. That's not to say that it couldn't run the higher voltage, but if it did, it would run a little hotter, thus decreasing the motor's life expectancy. Add to that the notion that the 380 was working harder to pull in more amps from the stock electronics.

I know it sounds weird, but it does make sense.
"Experienced user"
Jean - 1.10.13, 7:30 pm Post #144: | Reply With Quote
Once we did a test putting a regular 9.6V Toy battery in a new Bright Truck and then switching the battery for a 7.2V hobby grade battery and the truck ran then slower.. Kind of puzzled me to understand how hobby grade were way faster then toys running 7.2V vs a toy using 9.6V or more..mah being only more run time.
fubar's Avatar
"Experienced user"
fubar - 1.10.13, 7:49 pm Post #145: | Reply With Quote
Jean.... better electronics, transmissions geared for more speed, wheel bearings, lighter weight, etc... are all reasons why hobby grades are faster than toy grades, even when running less voltage.

BTW, how's your Smash working out? Any upgrades?
"Experienced user"
Jean - 1.11.13, 10:29 pm Post #146: | Reply With Quote
Hi Fubar, in fact the Smash is in stand by in Brooklyn at my Brother's in law place and I will get it next month when he'll come back here taking a break from his medical studies there. So far just planning to use it as it is with the stock little battery pack and later probably thinking putting in a lipo 2S.
bmaxx74's Avatar
"Experienced user"
bmaxx74 - 1.11.13, 11:28 pm Post #147: | Reply With Quote
As far as a 540 rear end have you though about a Lunchbox or midnight pumpkin there both 1/12?
fubar's Avatar
"Experienced user"
fubar - 1.12.13, 8:19 am Post #148: | Reply With Quote
Right on, Jean....make sure you take a video of it running on that lipo.

bmaxx74 - I was actually thinking about that last night. My friend has a Pumpkin, so I thought about taking measurements of the the rear end and see if I can possibly make it work. Definitely worth considering.

What I was planning on trying to do was use the 540 rear end off a Nikko Thor. There's also a Nikko rear end with twin 380 motors on evilbay that looks interesting. Lots of different directions I could go with this.
fubar's Avatar
"Experienced user"
fubar - 1.12.13, 12:50 pm Post #149: | Reply With Quote
Well, I'm going to have to scratch all plans as the chassis just wasn't able to hold up. I was doing some light bashing at the park, when I hit a small rock awkwardly, cracking the chassis straight across at the front bulkhead behind the servo.

Too bad, because I found some parts on ebay that were destined for this truck. Oh well....maybe I'll just look for a basket case blitzer or monster beetle and swap my parts onto that. I'll try to get a vid up as soon as I can.
"Experienced user"
Jean - 1.12.13, 8:48 pm Post #150: | Reply With Quote
RIP little toy should we say..! , I was looking for some infosabout those mofsets and trying to decode those voltage and amps,


Do you still have the old toy mainboard you fried? Could you try to read the codes and numbers on the two mofsets that we suspect have fried?

Thread Tools

All times are GMT -7. The time now is 2:25 pm.

Featuring: Ultimate Tamiya, Traxxas Slash forum, Slash 4x4 forum, Ultimate RC forums

Original content & design copyright ©2000 - 2013, Bamidele O. Shangobunmi & the Ultimate RC Network. Privacy policy
Manufacturer/vendor images, names, & trademarks are copyrights of their lawful owners & used with permission and/or within Fair Use guidelines.

Lego fan? Check out JANG's LEGO blog and LEGO videos on YouTube