Home Forums Tech Talk Anyone have experience with the OTL Storm Kart?

This topic contains 5 replies, has 5 voices, and was last updated by  Walt Gifford 2 years, 10 months ago.

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  • #39936

    Captain Slow
    Participant

    I work at an indoor kart track where we use OTL Storm rental karts.  Wanted to see if anyone on here has any mechanical experience with one, as we now have an extra one to experiment with. It needs to remain somewhat factory looking, but we can modify whatever we want to improve performance and handling.  The biggest issue is that these things weigh almost 600 lbs without a driver, and they understeer like crazy. Not sure what else can be done aside from messing with alignment/tire pressures and the engine settings. Any feedback is appreciated!

    #39958

    Walt Gifford
    Participant

    Cut all the bumpers off and experience the fear of real racing.

    FAA certified jet engine and aircraft technician,
    Nicholson Speedway class champion 2001,
    Yamaha KT100 Service Center,
    41 years karting experience

    #40040

    Patrick Roth
    Participant

    Captain Slow,

    Since no one else has taken a shot at this I’ll throw in my “any feedback is appreciated”. 😉

    While I don’t have the direct mechanical experience, I recently drove some at an indoor track outside of LA last month and coming from a sprint kart I remember thinking how poor the handling was (significant push and very sensitive to snap oversteer).  I attribute a lot of this due to a massive lack of balance in weight.  Of the 600 lbs, I think 599 of it is towards the rear due to location of the drivetrain and batteries.  Here’s my thoughts:

    1) First thing I would do if it were allowed would be to get rid of the rental kart tires and throw some race tires on it.  My suggestion would be to try out some MG Reds or Yellows.  The only caveat is it’s a crap shoot as to how race tires would react to an indoor surface?

    2) Is there any way to weigh the kart and find out what the actual weight distribution is?  My gut tells me it would be very rear heavy and if this is truly the case I would look for any manner to shift the weight towards the front (or try adding some weight to help the balance).  For reference a sprint kart typically is around 40% front to 60% rear weight bias.

    3) In terms of front end setup, I would suggest widening the front, add caster, and a little toe out.  This is what I would do with my sprint kart but keep in mind that this may just result in more snap oversteer due my belief of a massive weight imbalance.

    4) Is there a way to raise the front ride height to increase the leverage resulting in more front grip?

    Please note that these are things that I would do to my sprint kart and there may not be a directly correlation with the kart you are working on.  I just wanted to throw some ideas at you that might help.

    Patrick

    #40041

    William Martin
    Participant

    Wider front tires?

     

    #40074

    Josh Buttafoco
    Participant

    I ran a facility for a few years, originally hired as a mechanic. We had the otl karts.

    widen rear track 10mm per side. This leaves 10mm of visible axle between the axle lock collar and rear hub.

    full negative camber on the upper pill, leave the bottom a center pill.   Only 1mm toe out preside.

    Move the Seat all the way forward, make sure you have correct tire pressure. Try higher pressures to keep the tire from rolling over.

    mojo d2 were the most fun in the kart.

    hoosiers were good too

    mg yellow/white slowed the kart down. Harder was faster.

     

    #40181

    Walt Gifford
    Participant

    The only thing worse than a rental kart with no front grip is a rental kart with too much grip. Don’t put racing tires on it unless you have muscles like Zeus. At least that’s my experience with outdoor asphalt rental karts.

    MM

    FAA certified jet engine and aircraft technician,
    Nicholson Speedway class champion 2001,
    Yamaha KT100 Service Center,
    41 years karting experience

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