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Thread: OS upgrade?

  1. #1
    RC Enthusiast
    Join Date
    Aug 2012
    Sydney, Australia

    OS upgrade?

    I'm interested in upgrading my 3.3 motor with an OS MAX 21TM. is the standard revo drivetrain strong enough to handle this motor(I have a t max with an RB TM523 & it eats parts frequently)? I'm currently running on a forward only transmission. Would it be a good idea to upgrade to a 3 shoe clutch & what's a good tuned pipe for the OS motor? Any ideas on parts & upgrades? Thanks
    T Maxx RB TM523, Revo OS 21tm

  2. #2
    RC Qualifier
    Join Date
    Jun 2011
    Lucas, Ohio
    I personally am a fan of the ERCM pipe for any motor. Only bad part about that pipe is that there is no way to run out out the back like a normal revo pipe. A 3 shoe clutch is probably a good idea especially for racing.
    Joshua 24:15 Choose this day who ye will serve

  3. #3
    RC Qualifier
    Join Date
    Jun 2012
    Palisade Colorado
    Haha wow it sounds like my Tmaxx!!!! I've killed 3 trannys before the rb kit and 2 steel drive shafts and a couple spur gears lol

  4. #4
    RC Qualifier
    Join Date
    Dec 2011
    Okanagan Valley B.C.
    I've had my os21tm for a couple weeks now and about 3/4 a gallon or 2.5L of fuel through it and I'm still running a stock style clutch with a single chamber exhaust and the stinger bored out with the smaller style air filter, also running a "Stock" second gear instead of a close or wide ratio with a 16/36 clutch and spur. I'm also running the plastic center shafts with Traxxas cvd's, forward only and no center dif with smallish tires (t-maxx chevrons and hpi dog bones).

    So far this is the best she's ever run and behaved, wheelies on command and no need for "FULL THROTTLE" with that said I think the os21tm is a great "drop in upgrade" and the drive line should be able to withstand a modest power upgrade without too much breakage but then again I've only been running this setup for a couple weeks now so only time will tell.

    Last edited by NITR0 newbie; 10-09-2012 at 08:30 PM.
    O.S.21 Nitro Revo, Stampede 4x4, 2 Axial Honcho's

  5. #5
    RC Turnbuckle Jr. fallonguy's Avatar
    Join Date
    May 2006
    Dayton Nv.
    I have the .21Tm in my platinum revo with a Buku pipe it's great lots of power. I had the engine and pipe in my Slayer but it was way to fast couldn't control it so I switch them out.
    I wanted to put a really cool signature but I ran

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