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Old 09-25-2009, 09:55 PM   #1
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Default Brushless lst almost complete

Well, after Losifiend put the idea in my head I decided to jump on it. Got a good price on a nice LST roller, picked up the motor mount and single speed conversion, and have been wrenching away for the past two days tearing the truck apart and rebuilding.

First thing: I tore out the throttle/break servo and reverse servo. I was going to put in a FOC since the motor obviously can turn in reverse and back the truck up if needed which would work just fine. Also tore off the whole break setup since again the motor has built in breaking. Really lost alot of weight doing this which I think is a nice added bonus.

Second thing/question: After getting the motor installed, single speed, 66 tooth spur and I put a 16 tooth pinion on my mamba monster 2200. My plan is to run 4s, 35 mph will be plenty as long as I have good torque and some wheely power. With the 16/66 gearing, the pinion barely meshes the spur. It will engage, but one pull on the throttle and the spur will be shredded, its barely a mesh at all. The motor mount is designed so when you spin it the motor gets closer or further from the spur and this is with it spun so its as close as possible. Now, I know the simple fix would be to pick up a bigger pinion, slap it on, and call it good. I also know that gearing just to make it fit is a bad idea, and in all honesty Im not sure of where I should start gearing with this truck and its gear ratios. I know nothing about it.

LONG STORY SHORT: To those who have a clue, on 4s with my 2200 and a 66tooth spur, what pinion should I start with that should mesh. Keep in mine that the 16tooth wont mesh correctly, I think 17 or 18 would, but again I dont know where to start and I dont wanna overheat this motor.

Third and last thing/question (for now): Battery mounting. The way I have it setup now, the esc is right behing the motor in the area where the fuel tank used to be. This keeps the wiring nice and neat and I feel it is very secure there. This leaves my 4s 5000mah turnigy lipo to be mounted up front. I have seen some lipos layed sideways across the chassis which looks ok but Im not sure exactly what battery box would work on this chassis since I dont want to leave a soft pack lipo overhanging even the slightest bit off the chassis since this is going to be a bash rig. I battery box to shield it a bit would make me feel more secure and not have to worry about the lipo. I also thought about laying the lipo from front to back in the front of the truck over the steering servos but again need some way to secure it all. Basically any input or answers to this problem of mine would be awesome.

Ps: That thing above wasnt the last thing, this is: The spur gear cover no longer fits with this motor mount. Did you guys hack yours up a bit to make them fit, or you think it will be ok to just leave it off?

Once this thing is back together Ill shoot some pics for you all!
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Old 09-26-2009, 03:17 PM   #2
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All these looks but no answers Guess its time for experimentation!
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Old 09-27-2009, 04:38 AM   #3
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I think you would get more answers at rc monster.
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Old 09-27-2009, 08:56 AM   #4
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Quote:
Originally Posted by Ride1226 View Post
All these looks but no answers Guess its time for experimentation!
My only answer is to get a bigger spur. That way heat will be even less of an issue since you are gearing it down and it will mesh up without a problem. Unless 66T is the biggest you can get?

Otherwise R/C Monster or UltimateRC may be the places to go for help with this. Good luck. I love the LST trucks.
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Old 09-27-2009, 09:48 AM   #5
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Is there any spur gears that are bigger and made for the lst? The lst has the 3 notches that the hub line up with and then it bolts down to it. Not sure if there is any other brands that would fit that, because the guy at my lhs said the biggest gear he had was the 66t.
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Old 09-27-2009, 01:47 PM   #6
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Well the 66t spur was the biggest I could find, and it looks like Im going to order a pinion since none of the LHS have one bigger that 16t. What pitch is the spur on the lst, mod1 correct? Just wanna be sure before I order any pinions. I have seen a few vids of guys running with a 20tooth so Im gonna use that as my start point I suppose.
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Old 11-06-2009, 04:31 PM   #7
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I wanna do an E-LST2 too.
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Old 11-06-2009, 04:32 PM   #8
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But I need money 1st....
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