Tlt-1 motor advice

[OldSchoolDude]

I'm an RC novice and need some advice. I'm wanting to build up a TLT-1 racer similar to what HAWNmt did with his Mod-1 racer.

The problem is I am completely lost on a motor selection. HAWNmt suggested a couple of choices on an ESC, one of them being a Traxxas XL-5 which seems like a good choice. Do any of you know if it will fit in the TLT-1 chassis? Like I said though, I really need help with the motor selection. I'd like something that hops up the speed pretty good, something that'll pull some wheelies, and make it zippy. Due to his Mod-1 rules, HAWNmt runs a brushed motor, but I'd also consider a brushless set up. Can someone give me some basics on sizes, ratings, and how the battery pack effects performance. I hear people talk about 2S and 3S LiPo setups, but noone seems to mention the voltage. I sort of understand the mAh ratings, but the 2S & 3S thing I'm unclear on. I'd like to run a LiPo battery pack that'll get me about 30 minutes of run time. Any help and advice is appreciated.

Thanks,
Mark

 

[HawnMT]

The lipo part goes like this:

2s=7.4V (that's the simple math but really they charge up a little higher than that)

3s=11.1V

But the part about lipos that is equally important is the output and this is where "C" ratings come into play. The simple math is:

battery capacity x "C" rating = output

so a 5000mah battery x 40C = 200000 miliamps or 200amps

For most RC applications I like to keep it over 100 amps but the batteries I use in my tlt are 2S 2200mah 40C so they are only 7.4V at 88 amps but they hold up fine. But there's no way I can get 30 min runtime out of it.

It's going to be hard to find a battery big enough to run a fast motor for 30 min that'll fit in a tlt with all the electronics and still have a balanced suspension. I guess a saddle pack might work if you move the electronics above the trans into the cab area.

 

[HawnMT]

The brushed vs brushless motor part is a little hard to recommend. The Novak XRS/HPI 15T combo I run is far from optimal but I get by with it. I think going brushless is a mistake because fir the most part it'll be too much motor, even for the EZ-Run combos that are smaller and slower. Problem is brushed motors are becoming hard to find and the 15T I run is a little too much. A good 19T would be the choice for me.

 

[OldSchoolDude]

Thanks again for your help. When you say 19T motor, what does the T stand for? Did I say I was lost? (lol) Is that number of winding turns? Also, are you running the stock tooth gear on the motor? Also, is that a 540 size motor?

Thanks,
Mark

 

[HawnMT]

The "t" stands for turns. The lower the turns the faster the motor so the 15T I run is faster than the 19T I recommended. I run a 31 tooth pinion on a small spur(I forget how many teeth) and still the motor is has too much torque, but I don't want the truck to go any faster. And yes 540 size motors.