E-Maxx motor/esc good enough for 1/8th conversion?

[neavissa123]

tried the monster forum but nothing really happened...

hi there,

i want to spend $500 bucks on a 1/8th truggy conversion. i am not sure what to get? thought about getting a RC8T and throw in my e-maxx motors and esc. (3906).is that gonna work?

thanks,
G

p.s. i just want to get it going. doesn't have to go 1 billion mph.

[kufman]

The idea could work, but it will not be light or "1 billion mph". Using the E-Maxx esc will force you to use 2 battery packs due to the power/BEC arrangement. I believe I saw this kind of conversion several years ago before brushless began to take over. The guy bolted the old e-maxx motor mount plate to the center bulkhead of the buggy and ran 1 battery pack on each side of the car. Since you plan on using a truggy, you may not see too many bad effects of the added weight. In terms of gearing, you would have to figure out the current rollout of your e-maxx and apply that to the new car. the rollout can be figured by this equation:

Roll = (Pi*D)/R

Pi=3.14159
D=Tire diameter
R=is the gear ratio of your e-maxx.

If you make the roll out of your truggy the same as the e-max, you should have a good starting point for gearing.

A shortcut for this is to take the ratio of the tire diameters and multiply it by the gear ratio to get the ratio you need for the truggy.

So..

(E-maxx Tire diameter)/(Truggy Tire diameter) = Some Number

Take the E-maxx gear ratio and divide it by "Some Number" and you should have a good starting point for the truggy.

[neavissa123]

The idea could work, but it will not be light or "1 billion mph". Using the E-Maxx esc will force you to use 2 battery packs due to the power/BEC arrangement. I believe I saw this kind of conversion several years ago before brushless began to take over. The guy bolted the old e-maxx motor mount plate to the center bulkhead of the buggy and ran 1 battery pack on each side of the car. Since you plan on using a truggy, you may not see too many bad effects of the added weight. In terms of gearing, you would have to figure out the current rollout of your e-maxx and apply that to the new car. the rollout can be figured by this equation:

Roll = (Pi*D)/R

Pi=3.14159
D=Tire diameter
R=is the gear ratio of your e-maxx.

If you make the roll out of your truggy the same as the e-max, you should have a good starting point for gearing.

A shortcut for this is to take the ratio of the tire diameters and multiply it by the gear ratio to get the ratio you need for the truggy.

So..

(E-maxx Tire diameter)/(Truggy Tire diameter) = Some Number

Take the E-maxx gear ratio and divide it by "Some Number" and you should have a good starting point for the truggy.

thanks for the fast response and all the info. i am not sure anymore if the RC8-T is the right truck for me...
i am right now looking at a losi truggy that i can get for around $300. that would leave room for a novak system. is the novak gonna be strong enough for that truck? what system is gonna be the best for it? 4.5, 5.5 or the 6.5?

thanks for all the help

G

p.s. i really appreciate everyone's help. i think i need therapy by the time i am done with this project. :D

[chewie]

Why were my posts deleted

[neavissa123]

Why were my posts deleted

??? i certainly didn't do anything? i just kept editing my post. maybe that screwed yours up???
too bad, i have seen your posts before and would like to see what you have to say. hope this will not discourage you and write it again...

thanks

[neavissa123]

Why were my posts deleted

i think i know what happened. i have posted this in the monster truck section and now in this one...maybe you thought you left a post in this one?!

sorry about that. didn't want to double post...

thanks
G

[chewie]

Yup that sure is the problem lol geeze I feel retared. Id go with the 8ight t and get the losi conversion and get a mamba max or monster max combo. And a zippy 4s 4800 lipo and call it a day. I also highly reccomend a associated xp 1015 servo.

[kufman]

thanks for the fast response and all the info. i am not sure anymore if the RC8-T is the right truck for me...
i am right now looking at a losi truggy that i can get for around $300. that would leave room for a novak system. is the novak gonna be strong enough for that truck? what system is gonna be the best for it? 4.5, 5.5 or the 6.5?

thanks for all the help

G

p.s. i really appreciate everyone's help. i think i need therapy by the time i am done with this project. :D

The novak may work in that truck. The trick will be to get the gearing correct and that will be easiest to do with the 7.5. There is a guy at our local track that runs a 5.5 in a buggy, but he uses truggy diffs and a tiny pinion. Novak recommends a 12t pinion in the 8ight buggy so you would have to do the math with the bigger tires of the truggy and its different diff gearing. I don't own any truggy tires so I can't measure the difference in diameters. My guess is that you will end up around 11 or 12 teeth on the pinion for a 7.5 novak in the losi truggy. That is only a guess, the temps of the motor and controller will be the real determining factor.

[neavissa123]

UPDATE UPDATE UPDATE:

just bought a team losi muggy on ebay. got a sweet deal. cost me $300. RTR. tricked out...now i have only $200 for the conversion.
i am pretty sure that the emaxx setup is too weak for this big truck, so i am not gonna mess with it. $200 might barely get me a used novak. might not be the best choice though. so why not run it for a couple of month, save some money and then get the mamba monster max?! way better choice right?
the only thing i don't like is that its not censored...any other monster censored systems out there?

thanks a lot guys
G

[chewie]

Trust me the sensorless setup is far superior in these conversions. Not to mention 3x the power. Sell the nitro stuff and put a monster max setup in it. A old hvmaxx will overheat within a few mins. The newer one holds up ok but still is no where near the monster maxx setups. And yes I've driven a new novak setup in a 8ight and my neu 1512 1.5d with mamba max esc in my rc8 its a night and day difference ill stick to my sensorless. Not to mention sensorless motors are waterproof and there's less to go wrong

[neavissa123]

Trust me the sensorless setup is far superior in these conversions. Not to mention 3x the power. Sell the nitro stuff and put a monster max setup in it. A old hvmaxx will overheat within a few mins. The newer one holds up ok but still is no where near the monster maxx setups. And yes I've driven a new novak setup in a 8ight and my neu 1512 1.5d with mamba max esc in my rc8 its a night and day difference ill stick to my sensorless. Not to mention sensorless motors are waterproof and there's less to go wrong

i did not know all this...thanks...
i am gonna run the nitro a bit and then when i got the money to buy the monster max, i will. one more question though: i have 4x2s2p a123 packs. what would be the best configuration, considering that i don't need a missile? what lipo packs are needed to get a decent speed and run time?

thanks for all the help!

G

p.s. i am not expecting you guys to feed me all the info, believe me. i am also doing a lot of research too...

[chewie]

id get the 4s 4800 from zippy on hobby city or even two for the price maybe experiment with the two 4s packs wired in paralell for a 4s 9600 mah pack

[neavissa123]

id get the 4s 4800 from zippy on hobby city or even two for the price maybe experiment with the two 4s packs wired in paralell for a 4s 9600 mah pack

do i need that big of a pack (mah)? what if i only use it with one pack? is the amp draw to much? isn't it better to use more voltage? i remember reading about it. more efficient and things like that...


thanks
G

[chewie]

yeah more voltage = greater efficiency look into 5s packs 4800 mah isnt too much

[neavissa123]

ok...thanks chewie