need some help

Discussion in 'RC Offroad Forum' started by nellyneil, Feb 14, 2004.

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  1. nellyneil

    nellyneil New Member

    i have a kyosho ultima st i want to put a new motor in it. whats better O.S. Engines .15 CV-R or trx 2.5 also what size crankshaft will i need
  2. mastmec

    mastmec Member

    You need a short crankshaft, the OS CV-R is a better engine I think, very easy to tune.
  3. nellyneil

    nellyneil New Member

    what type of exhaust will i need for the trx 2.5 it is a rear exhaust will a stinger 360 do
  4. mastmec

    mastmec Member

    The TRX is rear exhaust, a tuned pipe would work best.
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