View Full Version : NEED advice on brushless and lipos
08-17-2010, 03:56 PM
I've got two summits that I need to make faster and run longer. I've read several posts about it but I figure I'll post my own to get what I'm looking for. One summit is running on 2.4g and other is the regular original receiver. I know getting the summit to go 40 or 50+ defeats the purpose of the summits capabilities, but I've read that the brushless tekin is the way to go to keep the semsored rock crawling capability. So what I need you guys to tell me cause both setups will be installed in both trucks so they will be the same. I've seen several series offered for tekin 1700k 2300k etc, please tell me which one is the best one for speed in the second gear to reach 40 or 50+? Also with lipos which series output would provide at least a hour but I would like to get hour and half run time and don't know if 5000 would better suit me or the 9000? If I also gotta change spur gear to reach speeds I'm looking for then I will. Just don't know all the details that née to be done to reach those speeds. I will be making tekin waterproof and will be built the waterproof lipos as well. Don't run in much rain but just wanna keep the option open to any kind of weather. Thanks for your help on this and like I said what you guys suggest I'm gunna do and will post pics andvideo once done.
08-17-2010, 04:09 PM
I am running two 8000Mah 2s lipo's on mine and I have not calculated run time yet but it seems as though I get tired before the truck does. For run time, go with as meny Mah as you can afford. I also use the Skycharger B6AC+ and I can tell you that for my smaller batteries it is fine. However, it only charges at 5 amps max so it take a LLLOOONNNGGG time to charge TWO 8000Mah batteries. I am looking for another charger that is not too expensive but will do two batteries at once.
08-17-2010, 05:08 PM
Thanks for input.I'm planning to get the package deal online with two lipos and a charger by Hyperion cause batteries will be waterproof so it will help. How fast u think your summit goes with that set up and did u have to change any gears?
08-17-2010, 06:04 PM
I know getting the summit to go 40 or 50+ defeats the purpose of the summits capabilities,
How do you figure that?? Throw on a set of firmer tires (or street tires) and go to town! When you want to crawl, just switch the Canyons back on it. You're not really defeating anything at all simply by going brushless (those that tell you otherwise I'm only guessing maybe are jealous because they bought an E-Revo instead, and putting the parts from a Summit on it to gain the rest of the Summit's capabilities isn't real practical due to $$$?).
If you want, you could even throw the P2 rockers on along with an E-Revo shell, and no one would ever be able to tell the difference... Until you lock those lockers and crawl up something a plain E-Revo never would :p
The benefits of brushless are not just more power, brushless systems are also much more efficient, greatly extending your run time.
I run the Castle Mamba Monster system w/2200KV motor on mine along with the stock Canyon tires and 18/68 gears I'm getting in the neighborhood of 45-50 MPH (running 6s). The Canyon tires are what's limiting the speed of it though. If I was to switch to something else I'm sure I could easily get 60-65 with just a spur gear change.
Two 3s 5000mAh LiPo batteries in parallel (3s2p 10,000mAh) gets me anywhere from 1.5-2.5 hours run time, depending on how I drive it (and is primarily how I run it). Top speed with 3s is 30MPH or a hair under with the above gears (two 8000mAh 2s LiPos in series (4s) will get you a bit more speed, but a bit less run time). For speed runs, 6s is the way to go. Don't expect much over 30-40 minutes run time with that config though lol.
08-17-2010, 06:18 PM
if you really want to run your summit up to light speeds and need info on it than I strongly suggest looking into the erevo boards. There is heap loads of experienced guys running tekins and mmm up to 91mph. We are the erevo slower brother (and slow is ok) - look up the thread "fastest e-revo challenge" to view many fast set ups (gearing , motors suspension etc) and the speeds they achieve
08-17-2010, 07:13 PM
I'm not looking to go light speed but would be nice to get around 50+ on some straight aways. Yeah nothing beats the lockin diff. So what ur saying is to 6s 8000 wired parallel will get my up to 45mph with the 1 1/2 run time. Will be using harder tires to reach higher speeds. I have 3 extra sets that come with one purchase of summit. Where online can I order just the tires and foam insert so I cn glue them on original rims that I have 3 sets of. Also will I need a wheelie bar with the brushless set up? Great responses fellow summit owners. It helps tremendecly. Keep the ideas running
08-18-2010, 09:01 AM
Brushless will not be a waterproof ESC .... so the maxamps waterproof lipos will be the only part waterproof. Speed versus Torque = ERBE versus SUMMIT
Personally I'd just buy a Mini erevo and haul it around on a trailer with my Summit! LOL
Tekin RX8 would be the way to go for better crawling capability even though you will have to gear for the speed you want to achieve.
08-18-2010, 01:06 PM
I'm planning on waterproofing the esc for the tekin to be waterproof. What gearing spur should I be looking to get to achieve speeds I want? Consences seem to be 6s 8000 lipos are the way to go wired parallel to get 50+ with harder tires. Thanks for everyones help
08-18-2010, 05:54 PM
Two 6s batteries in parallel won't fit in the battery compartments.
To run 6s you need two 3s packs (one on each side) wired in series.
The biggest 3s packs you can fit in the compartments are in the neighborhood of 6500mAh, though it's more common to see packs of around 5000mAh used.
As for gearing and speed, depends on what size your tires are. If you run something around the typical size of 5.5-5.75" dia, probably 18/54 or 18/58 would get you the speeds you want using a 2200 or so KV motor. If you use a lower KV, then you'll need to gear up some to get the same speed.
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