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  1. #1
    RC Racer
    Join Date
    Jan 2012
    Posts
    200

    High reving after speed runs

    Is it normal for a jato to rev high after speed runs it runs pretty good has a nice trail of smoke and the hottest temp it gets to is 225 It only revs up a for like 4 seconds and then slows down to normal

  2. #2
    RC Champion
    Join Date
    Nov 2003
    Location
    Long Island, NY
    Posts
    2,602
    Is it possibly downshifting into 1st gear making it sound like it is reving higher?
    Rustler-3.3,Revo-Hyper .21,Jato-3.3
    lots of mods

  3. #3
    RC Racer
    Join Date
    Jan 2012
    Posts
    200
    Well it does it from a complete stop

  4. #4
    RC Champion
    Join Date
    Nov 2003
    Location
    Long Island, NY
    Posts
    2,602
    I thought it was right after the run as it was slowing down. Not sure what it could be.
    Rustler-3.3,Revo-Hyper .21,Jato-3.3
    lots of mods

  5. #5
    RC Racer
    Join Date
    Jan 2012
    Posts
    200
    Yeah it will rev for a couple of seconds after i stop fast

  6. #6
    RC Turnbuckle Jr. Nitronaught's Avatar
    Join Date
    Oct 2005
    Location
    South Florida
    Posts
    18,586
    Sounds like your LSN may be a bit lean...... Try using the pinch test to set the LSN.
    Pinch the fuel line 1-2" from the fuel inlet and count. Once pinched the engine should run for 3-4 seconds, the idle should rise as it stalls...

    Less than 3 seconds, richen the LSN, do a WOT pass and re-test.
    More than 4 seconds, lean the LSN, do a WOT pass and re-test.

    Then fine tune the HSN and then the idle screw. Always do a WOT pass in between adjustments. Always tune with 1/2 a tank...

    Hope this helps...
    Founder of H.U.A.
    Hop Ups Anonymous

  7. #7
    RC Qualifier
    Join Date
    May 2011
    Location
    Minnesota
    Posts
    303
    mine did that when it shifted from second to first.
    Philippians 4:13

  8. #8
    RC Racer
    Join Date
    Sep 2009
    Location
    Red Deer, Alberta
    Posts
    244
    Your LSN is to lean.

    Easy fix.... Turn LSN counterclockwise 1/8 turn until you notice its not "hanging" when you let off the gas. Also the engine might be running a little hot. Be sure to regulate fuel intake for proper cooling. Hope this helped.


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