Page 1 of 2 12 LastLast
Results 1 to 40 of 42
  1. #1
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839

    E-Maxx's any fun

    I was originaly looking into a stampede vxl and then I found out that the Emaxx goes 30mph with the stock motors. They were dyno'd at about 15,000rpm. I found a brushed motor that is 35,000rpm. That would make it go so fast (am I correct).

  2. #2
    RC Champion
    Join Date
    Nov 2006
    Location
    Pennsylvainia
    Posts
    1,854
    What are the motors? Link would help.
    2.5 Crankcase w/ Bearings-$18 Shipped!

  3. #3
    RC Qualifier
    Join Date
    Mar 2001
    Location
    St. Louis, Mo.
    Posts
    327
    That sounds pretty high. I hope you're not talking about a 540.

  4. #4
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    I just typed in 11t motor on www.towerhobbies.com and came across this one
    http://www2.towerhobbies.com/cgi-bin...?&I=LXJAH9&P=7 .
    Would it really have the 39,000rpm it claims

    Although it's a 540 sized motor
    Last edited by cooleocool; 09-04-2007 at 03:19 PM. Reason: merge

  5. #5
    RC Champion
    Join Date
    Nov 2006
    Location
    Pennsylvainia
    Posts
    1,854
    I am not sure but I don't think that will work.
    2.5 Crankcase w/ Bearings-$18 Shipped!

  6. #6
    RC Turnbuckle Jr.
    Join Date
    Jun 2005
    Location
    Hard to tell these days...
    Posts
    6,724
    You could put those in an E-Maxx but you'd need a different ESC to handle them, you'd need to gear them way down so they could actually get the truck moving without burning up the motors and they would require regular maintenece and rebuilds. I'd just go for BL if you want speed.
    It's a Jeep thing, you wouldn't understand.

  7. #7
    RC Turnbuckle Jr.
    Join Date
    Mar 2007
    Location
    near New Orleans
    Posts
    5,903
    I think that motor is a 540 which is appropriate for stadium trucks but is not large enough for the E-Maxx. It will not have enough torque. Try the stock titan motors with 14 NiMh batteries first and see if you are happy with that.
    E-Maxx Neu1515 1y/MGM 5s

  8. #8
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    I read that the EVX2 goes down to 10turns. Here is the link http://www.traxxas.com/products/acce...ories_evx2.htm

  9. #9
    RC Turnbuckle Jr.
    Join Date
    Jun 2005
    Location
    Hard to tell these days...
    Posts
    6,724
    A guy at my track runs 13 turn Reedy 540 motors in his E-Maxx just fine, but he has several upgrades to make them work good including a Novak Super Duty ESC.


    Edit, I did'nt know that about the EVX-2, it might work okay then...
    It's a Jeep thing, you wouldn't understand.

  10. #10
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    In that case, where can I get a 550 or larger motor with extreamly high RPM and Torque. HOw much Power (watts) does the titan motor put out.

    Is the 2 speed in the Emaxx good. If i put it in second gear and drive, how slow is the off the line accelaration
    Last edited by cooleocool; 09-04-2007 at 03:20 PM. Reason: merge

  11. #11
    RC Qualifier
    Join Date
    Mar 2001
    Location
    St. Louis, Mo.
    Posts
    327
    Quote Originally Posted by pede_kid
    In that case, where can I get a 550 or larger motor with extreamly high RPM and Torque. HOw much Power (watts) does the titan motor put out.
    You're not likely to find larger motors with high rpm. Generally, the larger they are the lower the rpm but the greater the torque. The torque is what you need in a monster truck.

  12. #12
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    how much should I lower the gearing for that?
    Is changing the gearing any different than a stampede because of the 2 speed?

    I am not completly sure how the emaxx works. Will those motors go up to the correct voltage

    What would be the fastest brushed motor for the EMAXX?
    Last edited by cooleocool; 09-04-2007 at 03:30 PM. Reason: merge

  13. #13
    RC Turnbuckle Jr.
    Join Date
    May 2007
    Location
    Devon, England
    Posts
    6,344
    Fastest means nothing. Stock titans are the best bet, but many people have success with 600 & 650 can motors, Im sure they'll chime in. On the EVX there are lots of mods you can perform so it will run more volts and amps, and run cooler as a result- not for the inexperienced for fient hearted though....
    READ THE FAQ!
    or else.....

  14. #14
    RC Champion
    Join Date
    Dec 2005
    Location
    Charlotte, NC
    Posts
    2,230
    Remember the Titans

    Try slight changes in gearing and/or high quality 7-cell packs.
    Y-Town Competition Crawlers Team Driver

  15. #15
    Traxxas Marshal cooleocool's Avatar
    Join Date
    Mar 2003
    Location
    Wherever the road takes me.
    Posts
    37,236
    To answer the question in the thread title, heck yeah the E-Maxx's are fun! They're very cool, four wheel drive, two speed monster trucks!

    I wouldn't worry about the motors until you actually get the truck. You'll probably find that it's a fun truck in stock form! I have been running mine with the stock power setup since 2001! The Titans are great, low maintenance motors!

    PS: There's no need to make a bunch of posts about the same thing. I closed one, merged another with this thread, ...
    Last edited by cooleocool; 09-04-2007 at 03:46 PM.
    "Happiness depends upon ourselves." -Aristotle

  16. #16
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    sorry about that. Do you know of any other upgrades (not very costly) that could give it a higher top speed. From what I can see it has a lot of power.

  17. #17
    Traxxas Marshal cooleocool's Avatar
    Join Date
    Mar 2003
    Location
    Wherever the road takes me.
    Posts
    37,236
    A good pair of seven cell battery packs would be good. Other than that, I'd just upgrade what you break/wear out.
    "Happiness depends upon ourselves." -Aristotle

  18. #18
    RC Qualifier
    Join Date
    Mar 2001
    Location
    St. Louis, Mo.
    Posts
    327
    Quote Originally Posted by cooleocool
    I have been running mine with the stock power setup since 2001! The Titans are great, low maintenance motors!
    I'm with ya on that one! Maybe slightly different 550's than the titans. But I have never had a need to boost the speed on this thing. I have other vehicles better suited for that.

  19. #19
    RC Qualifier
    Join Date
    Aug 2007
    Location
    MA
    Posts
    284
    dood, get an MM ESC and dual tekin 1/10 MT rage motors and u got like 5,000 rpms rite there...
    tamiya plugs are depressing...

  20. #20
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    I anyone has both, could you compare the Emaxx to the stampede VXL. I know they're really different

  21. #21
    RC Champion
    Join Date
    Jan 2007
    Location
    Hollywierd, FL
    Posts
    2,779
    Quote Originally Posted by pede_kid
    I anyone has both, could you compare the Emaxx to the stampede VXL. I know they're really different
    I can compare my e-maxx to a mm5700 rustler. The Rusty is light, nimble, fast, and bashes well. My E-Maxx is a beast, it is heavy, in comparison to a BL stadium truck is slow, it had a habit of breaking which required alot of money being thrown at the problem. it is not exatly nimble, it can run over the Rusty!!! and I absolutly love it

    Here are them both in action this past weekend: http://www.youtube.com/watch?v=oNa57ajpAPM
    Run it, break it, fix it, love it :]=~

  22. #22
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    what if i ran it with two esc's. what would i do with the servos and reciever

  23. #23
    RC Turnbuckle Jr.
    Join Date
    Mar 2007
    Location
    near New Orleans
    Posts
    5,903
    Quote Originally Posted by DickyT
    I can compare my e-maxx to a mm5700 rustler. The Rusty is light, nimble, fast, and bashes well. My E-Maxx is a beast, it is heavy, in comparison to a BL stadium truck is slow, it had a habit of breaking which required alot of money being thrown at the problem. it is not exatly nimble, it can run over the Rusty!!! and I absolutly love it

    Here are them both in action this past weekend: http://www.youtube.com/watch?v=oNa57ajpAPM
    I love the "body english on the jumps". When I do that my Maxx always jumps higher.

    As usual great vids. Thanks for sharing.
    E-Maxx Neu1515 1y/MGM 5s

  24. #24
    RC Qualifier
    Join Date
    May 2007
    Posts
    535
    look at these motors if you want more power. A e-savage is simaler to a e-maxx in second.
    I currently use the Johnson M63725(aka: E-Bay 600 motor) and I'm pleased with them being allot more powerful than stock and run allot cooler, even the EVX is cooler, I use 20t pinion but will be trying 22t, maybe even 24t(18t seemed to slow). After 1/2 block I have to let off the trigger to get the wheels back down to steer and thats in second with E-Bay 6-cell 3500 packs, They are also more smooth on the start, I can't say anything about reliability because I've only had 6 runs so far.

    http://www.e-savage.com/forums/forumdisplay.php?f=9

    [C.1] picking the suitable motor(s) - practical reasoning...
    before we start picking motors,we need to clarify the application properties involved here. a monster truck is a heavy vehicle with heavy and large wheels [rotating mass]. such a vehicle needs the appropriate powerplant: motors that can deliver a sheer torque load along with good rpms. an efficiency is a must to keep the runtimes reasonable [since heavier, those MTs require more power to move in contrast with other types of vehicles, which means less runtime]. using a typical modified 540size motor is not recommended: 1.low efficiency, 2.relatively low torque, 3.frequent + high cost maintenance [brushes,commutator cut]. that is the point where 550motors step on the scene: 30% longer armature and magnets + larger commutator surface = more torque, 30% longer copper windings + 30% longer can + fan mounted = higher heat tolerances and ability to handle high-voltage and deliver more power without compromising the ease of almost zero-maintenance and relatively long lifespan. although that specific category of motors existed for many many years, it has only started to be used in RC cars during the past few years. their most usual application in RC was with boats and large aircraft. besides the 550sized motors, another similar category is the 'pure' powertool family: the motors that companies used to power their [mainly cordless] drill and dremel products, actually fit the needs of eMTs better than the rc-bred ones...


    [C.2] the debate chart...
    RV=Recommended applicable Voltage [volts]
    RG=Recommended Gearing [pinion range -assuming stock wheel setup]
    *=it is recommended that you also use a smaller spur or larger wheels to gain more speed. for the stock wheels, you should use a pinion gear up to 25t.
    **=it is HIGHLY recommended that you also use a smaller spur or larger wheels to gain more speed. for the stock wheels, you should use 25t or larger pinions [up to 30t].
    Comp=Compatibility [DF=direct fit, mm=minor mod, Mm=Moderate mod]
    EP=Estimated Price [$]
    ES=Estimated top Speed [xx-xx mph -based on gearing,applied voltage and quality&number of cells used]
    RPM=revolutions per minute [unloaded]
    Eff=efficiency [percentage]
    EL=Estimated Lifespan [number of runs. vastly depends on cooling and maintenance as well. all estimates are the minimum ones. the motor(s) will probably live much longer but that depends...]
    DE=Dual ESC necessity [you will need a second ESC to drive both motors due to high-current drain. note that the 'no' value doesn`t mean necessarily that you may not need to: sometimes due to high-end cells and/or gearing and/or ambient temperature situations, it becomes imperative that you use dual ESCs with motors exceeding 250-300W each. the oposite stands as well.]
    NOTE#1: all values are approximate values
    NOTE#2: all rpm, efficiency and power values are based at each single motor seperately. multiply power by 2 since you will be using twin motor setup.
    NOTE#3: the johnson st550 motor is the stock e-zilla motor [identical performance specs].
    NOTE#4: the 'peak power' values for the traxxas titan550,johnson st550,kyosho x-s550evo,johnson m63725, multiplex p600,kyosho magnetic mayhem, are based on a 12v voltage dyno-test. all other peak power values are based on a 14.4/16.8v [depending on the motor] voltage feed.

    ________Motor____________RV_______Power_____RPM___ _Eff___Comp___RG_____EP______ES______EL______DE
    Johnson M63725_________14.4-16.8___158W_____35300___70%___DF___18-21___3-10$___30-36___50-200___no
    GreatPlanes S600F_______12-16.8_____300W_____39600___72%___DF___17-20___12-15$__35-42___30-60____no
    GreatPlanes T600F_______12.16.8_____240W_____35700___73%___DF_ __17-20___12-15$__33-38___40-80____no
    Multiplex P600___________12-16.8____180W______33200___79%___DF___17-20___8-12$___32-37___40-80____no
    Master Airscrew s550_____12-14.4_____220W_____35700___71%___DF___17-19___8-15$___33-38___40-80____no
    Johnson st550___________14.4-16.8___149W_____33700___70%___DF___18-21___3-10$___30-36___50-200___no
    Kyosho Magnetic Mayhem_12-14.4_____181W_____32100___70%___DF___19-22___5-20$___30-38___40-80____no
    Traxxas Titan 550________14.4-16.8___129W_____31200___70%___DF___18-21___10-20$__26-30___50-150___no
    DeWalt 820 PowerDrill____16.8-18______321W_____31900__80%___Mm___22*____15-30$___32-44__50-200____yes
    Johnson BP03028________12-14.4_____330W______29000__78%__mm(?)_20-22*___5-20$__32-44___20-80____yes
    Johnson PT03006________12-14.4_____280W______38300__70%___DF___17-20___5-20$___34-42___20-80____no
    Johnson PT03005________12-14.4_____370W______46400__68%___DF___17-18___5-20$___36-45___20-80____yes
    Johnson PT03016________14.4-20_____500W______22000__85%___DF___22**____5-20$___36-45___60-120___yes
    Johnson PT03010________14.4-18_____520W______26000__68%___Mm___22**___10-25$__36-48___60-400___yes
    Johnson PT03008________14.4-16.8____300W______31100__70%___DF__20*-22*_10-25$__36-43___60-400___no
    Johnson PT03015________14.4-16.8____310W______30400__65%___DF__21*-22*_10-25$__36-43___60-400___no
    Johnson PT03007________14.4-16.8____410W______25000__76%___DF___22**___10-30$__36-46___60-400___yes
    Graupner BB700Turbo____14.4-16.8_____280W______26000__80%___DF___22*____15-50$__36-42___60-400___no
    Kyosho X-S 550 EVO_____14.4-16.8____164W______36900__72%___DF___17-19___15-30$__32-37___60-160___no
    JP powerspeed 660_______14.4-16.8____220W_____38100___76%___DF__18-20___15-30$__32-38___60-160___no


    [C.3] where to buy...

    Johnson st550:
    http://www.allelectronics.com/cgi-bi...DC_MOTOR_.html

    Johnson M63725:
    http://www.allelectronics.com/cgi-bi...DC_MOTOR_.html

    DeWalt 820:
    http://robotcombat.com/marketplace_dewalt.html

    GreatPlanes S600F:
    http://www2.towerhobbies.com/cgi-bin...&I=LXJ766&P=ML

    GreatPlanes T600F:
    http://www2.towerhobbies.com/cgi-bin...&I=LXJ765&P=ML

    Master Airscrew s550:
    http://www2.towerhobbies.com/cgi-bin...?&I=LXZ902&P=0

    Graupner 700BB Turbo, Traxxas Titan550, Kyosho Magnetic Mayhem:
    {hobby shops carry these}

    Johnson driller 700series pto3016:
    http://www.allelectronics.com/cgi-bi...DC_MOTOR_.html

    all other Johnson models:
    www.johnsonelectric.com
    here you can find a local dealer near you, or order a large quantity of any motor model you are after:
    http://www.johnsonelectric.com/conta....php?page=html

    JP powerspeed 660:
    http://www.birminghammodelcentre.co....CanMotors.html

    Multiplex P600:
    http://www2.towerhobbies.com/cgi-bin...?&I=LXEXU3&P=7

    other motor links if you are interested in your own research:
    http://www.modelmotors.cz/index.php?id=en&nc=produkty
    http://www.mmeu.com/storefront/grx.asp
    http://www.fastelectrics.com/motors.asp
    www.maxxprod.com/mpi/mpi-26a.html


    [C.4] conclusions regarding closed endbell motors...

    their pluses: extremely powerfull [some of them are more powerfull than their expensive counterparts -brushless motors], long lifespan [1-2years of extreme use], very low cost [3-20$], compatibility with the vast majority of brushed ESCs, virtually no maintenance [their commutator and brushes are made of steel/copper compound and they require no lathe,brush replacement,etc], and (as with all brushed motors) they can work in very harsh conditions -as oposed to many brushless motors which aren`t as rugged.

    their minuses: relatively low rpms but unmatched torque [that is why they must be geared high to see speed improvements], some of them have shaft incompatibility with current pinions [since the diameter of the shaft of some powertool motors is 5mm -towards the standard 3.2mm], they REQUIRE 12cells or more [which makes them useless on cars using 6 or 7 cells because these motors provide poor performance with low voltage] and as with most brushed motors they have [towards to the brushless ones] relatively low efficiency-aka short runtimes. especially the last one. most of them reach a peak efficiency of 70% [which means 70% of power gets to the shaft rotation (rmp*torque) and 30% is thermal losses], they are no match for the 90%+ peak efficiency of many brushless motors. which means you will get relatively short runtimes. keep in mind though, that the efficiency of modified low-turn brushed motors is around 50-60%. that is a very stiff reason not to use 'plain modified' 540 motors in such applications.

    i have used many powertool motors throughout the past years, and my experience has shown that most powertool motors are a really good choice if you have good packs and actually a bunch of them! just for the record, i am getting 15minutes [or so] of runtime with the stock e-zilla motors and IB3600 packs, and that runtime is shortened down to 7-8 minutes when using dual drill motors [270-280watts power for each of those motors]. but i have to say...its crazy!

    --------------------------------------------------------------------------------

  25. #25
    RC Qualifier
    Join Date
    Apr 2007
    Location
    Kamloops B.C.
    Posts
    937
    holy crap. thats just mind boggling
    if ya can't roam wit the pack go play wit the pups

  26. #26
    RC Racer
    Join Date
    Jun 2007
    Location
    Schweinfurt Germany
    Posts
    128
    Someone let the cat outta the bag.


    The Johnson ST550's...... Stay away from them. Both myself and my buddy have had nothing but trouble with them so far. I don't know if its something with how we are running them but both of us have literally watched them burn down.

    The Great Planes S600 is an AWESOME motor. I didn't know it but one of them had launched a brush in its first run and i was actually running my truck on ONE motor.... thats right ONE MOTOR and didn't realize it. The only way I knew that only one motor was working was when my pinion got suicidal again and jumped off the truck. then the truck stopped moving. I'm eager to see what 2 motors can do now. Just waiting to hear back from Great Planes on their warranty policy

    Even with all these alternatives I'm interested in going brushless just for the run time. I'm sick of 10 minutes and out. I'm going to upgrade batteries here shortly and we'll see how that goes.

  27. #27
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    would it be possible to have two ESC's and two motors. I would really like to do that

  28. #28
    RC Racer
    Join Date
    Jun 2007
    Location
    Schweinfurt Germany
    Posts
    128
    Yup. For motors over 300w per its recommended that you run 2 ESC's.

    Don't get it in your head that you can just throw motors on the thing and not have to worry about upgrades though. The faster you go the bigger the crashes. At a bare minimum you'll need to upgrade your drive shafts. even on stock motors I've managed to break drive shafts.

    There is a wealth of information out there about the trucks. Read as much of it as you can and try experimenting and finding out what works for you.

  29. #29
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839

  30. #30
    RC Racer
    Join Date
    Jun 2007
    Location
    Schweinfurt Germany
    Posts
    128
    Yeah that would work. If I were doing a dual ESC setup I'd do it different as to not destroy or damage any of the components coming off of the ESC's. Instead of cutting the ends off the motor wires I'd just cap them as they were and tie them out of the way. No need to cut them off as they aren't going to be used anyway. As for the battery portion..... just like the lead coming from the reciever.... make a Y connector. Take the tamiya plugs off the ESC's and put on Deans or power poles. Then make Y connectors to work with your batteries. This way if you have a problem and need to pull one ESC out or want to return the truck to a single ESC dual motor setup you won't have to worry about cutting anything else.

    I'm really suprised a shop spent all the time and made such a confusing diagram as that. I looked at it and wasn't sure if it was a diagram on how to start a fire or how to wire 2 ESC's

  31. #31
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    How fast could the E-Maxx (stock) go with 7-cells?

  32. #32
    Traxxas Marshal cooleocool's Avatar
    Join Date
    Mar 2003
    Location
    Wherever the road takes me.
    Posts
    37,236
    The 30+ that Traxxas stated was for seven cell batteries.
    "Happiness depends upon ourselves." -Aristotle

  33. #33
    RC Turnbuckle Jr.
    Join Date
    Apr 2007
    Location
    In a box on Hwy 64.2 - Bashin' With Mike, Pat & Brad. hey i didnt start this.
    Posts
    7,488
    i have 2 emaxx's and noyl los tone motor. me and a few others noticed some smoke coming out of the truck. well got the body off and seens smoke pouring off one motor. now i wasnt upset at all since i got the truck for 175 used at my lhs. what got me more upset was when i tried to convert to thcc and i fried my evx.
    ADDICTED TO THE TWILIGHT SAGA

  34. #34
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    Are these good motors...
    http://youtube.com/watch?v=oUjeTdVyna4

  35. #35
    Traxxas Marshal cooleocool's Avatar
    Join Date
    Mar 2003
    Location
    Wherever the road takes me.
    Posts
    37,236
    I'd just stick with the Titans... or go BL like most people recommend.
    "Happiness depends upon ourselves." -Aristotle

  36. #36
    RC Qualifier
    Join Date
    Jul 2007
    Location
    Perth Western Australia
    Posts
    348
    A few years ago a couple of the other e-maxx drivers at racing were using one big dewalt motor. They went pretty well, not as fast as brushless, but faster than the titans. I don't think they got that hot either.

  37. #37
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    I'm still looking into the EMAXX. I have read that it's expensive to maintain. I have a stampede which is all stock except for motors and wheels/tires and I haven't broken anything yet. Does the EMAXX break a lot of parts? How would I fit a 7 cell battery into the EMAXX?
    Last edited by pede_kid; 10-13-2007 at 10:04 AM.

  38. #38
    RC Qualifier
    Join Date
    Sep 2007
    Location
    Pensacola/SanDiego
    Posts
    993
    Why is an E-maxx so expensive?

    Because it's worth it!

  39. #39
    RC Qualifier
    Join Date
    Aug 2007
    Location
    New Jersey, USA
    Posts
    839
    How would I fit a 7 cell battery into an EMAXX? Do parts break often?

  40. #40
    RC Qualifier
    Join Date
    Sep 2007
    Location
    Pensacola/SanDiego
    Posts
    993
    You can buy the 7 cell packs made especially for the E-maxx
    Just an Example:



    It's a 10 pound truck. If you hit a jumping mailbox post or parked car, something,s got to give! Go slow and practice and it will last you for many years.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •