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  1. #1
    RC Competitor
    Join Date
    Dec 2010
    Posts
    81

    How many gallons of fuel should I get to run before rebuild/replace motor?

    How much fuel in gallons do the long time 3.3 users get on average before rebuild/replacement of engine if tuned properly? I have am on my forth gallon of fuel and tuning is more difficult but not immpossible. Anyway I am going to a big race next weekend in Herny County GA. and I don't really have the money for rebuild, but if it is for sure time for rebuild I will do it. The flywheel is pretty easy to turn over with finger is this a indication of worn sleeve/piston? I race my truck almost every weekend but haven't run it real hot or lean. Thanks for any info on 3.3 run time!

  2. #2
    RC Champion
    Join Date
    Mar 2011
    Location
    Connecticut
    Posts
    2,334
    If you're ready to replace your engine, you can always use the Engine Replacement Plan from Traxxas.

    You can get a brand new TRX 3.3 Racing Engine for 1/2 off of the regular price.
    Just accelerate, and only good will come.

  3. #3
    RC Racer
    Join Date
    Oct 2010
    Posts
    134
    Quote Originally Posted by savannahmick View Post
    ......The flywheel is pretty easy to turn over with finger is this a indication of worn sleeve/piston? ......
    It may be an indication of a very nicely polished sleeve/piston. As long as the bearings or con bushing aren't worn out... it should be fast?

  4. #4
    RC Competitor
    Join Date
    Dec 2010
    Posts
    81
    I guess I am just worring to much and ther no way to really tell unless you break it down and inspect. I was just curious how long most 3.3 last or opinions on how long they last. Thanks for any input!

  5. #5
    Marshal Double G's Avatar
    Join Date
    May 2008
    Location
    Tanker 822
    Posts
    9,410
    Some last less than a tank, others around 8 gallons. One person reported 12 gallons. Tune plays a big part. So run it until something lets loose or it stalls when warm only to restart when cool.
    The Super Derecho

  6. #6
    RC Turnbuckle Jr. CarGuy7a's Avatar
    Join Date
    Dec 2008
    Location
    Gettin' Lucky In KY
    Posts
    3,861
    Mine is starting to die at about 6 gallons. It's very hard to tune and likes to stall alot when the motor reaches running temp around the 220 to 260F range, a big indicator of a worn piston/sleeve. What type of surface you run on is a big factor to how long a motor will last as well. I run mostly on short grass so there is alot more friction for the motor to overcome compared to if I ran on smooth dirt.

  7. #7
    RC poster
    Join Date
    Apr 2011
    Location
    NY
    Posts
    11
    I've had about 5 or 6 3.3 engines and I seem to get about 5 gallons out of them before they blow. I have never raced them just some bashing on my track out back.

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