Looking for a buggy project

[BrianG]

It actually works VERY well. The 2d was supposed to be a 2.5d, but the box was marked wrong and I got the 2d instead. I didn't realize it until I ran it a few times and wondered why it was so darn fast. :)

I love the Quark for its smoothness and ability to run just about any motor equally well. Yeah, it has a couple of limitations, but am definitely willing to live with that for better written motor driver firmware.

Even when doing top speed runs up and down the street and heavy throttle starts (tires are getting worn), I still get about 45 minutes of runtime and only drained the batts to ~6Ah (8Ah cells). The motor is warm at about 100*F and the ESC and batteries are cooler. I would've thought they would be hot with such a low turn motor.

So, it's a "little" faster than I was planning. And to add to that, I'm trying out a 16T steel pinion (to test durability when using a solid mount with consistent mesh). I haven't run it since last weekend as I lost a wheel nut and need to replace it first.

[jollyjumper]

bump, any testing with steel on steel gears yet?
how is the neu doing? you run 4s right?
2600Kv X 16.8V full charge = 43680rpm. still not extremly high.

[BrianG]

I ran it a couple more times in the street and around the yard, and the pinion seems to be holding up just fine so far.

Yes, I run 4s with the 2.5d. Speeds a really too fast for the small track I run at but it still has plenty of torque.

BTW: that 16.8v figure doesn't last very long. If I let the packs sit for an hour or so after a charge, the drifts back down a bit even with no load. So, I would assume that the voltage drops to ~3.7 within a few minutes of running so that rpm isn't being hit very much.

Gotta bump up the thread

I want a buggy or truggy lol...... I want the crt.5, But its just to small for what I want to do, even with a EXT chassis....


Anything new with it Brian?

[BrianG]

Nope, nothing new. Ran it around the house a bit and it still is working just fine. Haven't been to the track in a long while now though.

Originally Posted by BrianG

Nope, nothing new. Ran it around the house a bit and it still is working just fine. Haven't been to the track in a long while now though.

Why?

All that money and time into it, I would be driving those cars you have every day!

[BrianG]

LOL. Mostly I like building them more than driving them TBH. I'd probably sell them, but you can never get what you put into them, plus a little extra for the time/effort.

[supralover72]

Originally Posted by BrianG

LOL. Mostly I like building them more than driving them TBH. I'd probably sell them, but you can never get what you put into them, plus a little extra for the time/effort.

Whew, atleast I'm not alone and crazy. I'm the same way.

Originally Posted by BrianG

LOL. Mostly I like building them more than driving them TBH. I'd probably sell them, but you can never get what you put into them, plus a little extra for the time/effort.

Yeah me too

The cool-ness wears off after a few months

Im addicted to racing, I cant get off of it lol.. Im over 3grand in racing, Started at about last summer, So almost a year of gathering things

[supralover72]

Originally Posted by BlackedOutREVO

Yeah me too

The cool-ness wears off after a few months

Im addicted to racing, I cant get off of it lol.. Im over 3grand in racing, Started at about last summer, So almost a year of gathering things

If you like to build more than drive, what's attractive about racing. Is it that fun?

Originally Posted by supralover72

If you like to build more than drive, what's attractive about racing. Is it that fun?

Saying racing is fun is a understatement, Its AWSOME ah heck!!!!!!


Building and then tweaking the car so it drives right, then actually driving it clean and smooth

Its the best thing EVER! IMO

[Patrick]

Originally Posted by BlackedOutREVO

Saying racing is fun is a understatement, Its AWSOME ah heck!!!!!!


Building and then tweaking the car so it drives right, then actually driving it clean and smooth

Its the best thing EVER! IMO

Yeah, racing is pretty good, especially when you get your car setup right and have a race that your happy with your driving, that's fun. I don't like being too competitive, as long as I'm happy with how I drove (doesn't happen that often though lol). It's good knowing the guys in your class as well since you all have something in common.
Plus I think racing tests your car a lot more than most types of bashing. Sometimes I've thought my car was handling alright when bashing, then I take it to racing and....hmm....maybe it needs some more tweaking.

[captain harlock]

Me, either. Lately I'm trying to be more courageous and I'm trying to resist the shiny look of my SuperMaxx, but I have to run it if I want to enjoy it to the fullest.

[supralover72]

Wow that's sexy.

[BrianG]

Dragging this thread up to post a little update.

I was having troubles with the Quark ESC seeming to shut down occasionally. But by the time I walked over to see what was wrong, it would be ok. I was using a cheap $10 UBEC and thought it was overheating, so I removed the shrink wrap and added a heatsink to the IC, and then re-wrapped it in cable braiding (used mostly for computer cables) to aid in cooling. Seemed to be fine for a while, but then started to "reset" again. At that point I was really suspecting the Quark ESC despite temps being cool, so was gonna wait and get the MMM. Well, I recently got the CC BEC and decided to try it in the buggy. 'lo and behold, all problems went away! I'm only using one servo (Hitec 5945MG) so I didn't think the current would be that high, but it apparently was. Or, it could have been the switching noise resetting the receiver, I dunno. Bottom line, the cheapie UBECs might be good for 1/10 scale stuff with less servo draw, but not for the larger vehicles with stronger/multiple servos.

On a side note, I was playing around with the buggy in the yard yesterday and was having a ton of fun. I geared down to 46/12 to help runtime. I get about 50-55 minutes of runtime on my MA 4s 8Ah packs now and still have ~40mph speeds. However, about 35 minutes into the run, I was doing a high-speed run down the street showing off to the neighborhood kids when a car turned into the street. I jammed on the brakes and turned around to come back, but the car lacked any punch. Turned out I snapped the center shaft to the rear end! lol, gotta love BL power!

BTW: temps @ ~60*F ambient after the run were: ESC (~95*F), Motor (~87*F), batts (~95*F). I'm pretty satisfied!