RS 90/101 Case Modification service

Discussion in 'General RC Boating Forum' started by Jeff Lutz, Mar 15, 2019.

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  1. Mar 15, 2019 #1

    Jeff Lutz

    Jeff Lutz

    Jeff Lutz

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    I’m  offering this service to bore your case to fit the new larger  O.D. piston/sleeve assembly  that comes in the new Evo  (which is readily available). Some people have turned the O.D down on the new sleeves to fit the RS case,  this one time mod will make it so you can freshen up with a new drop in piston/sleeve, plus the larger O.D sleeve is better.   If in the future you buy a Evo the sleeve will still fit it also. The older big block CMB’s had even larger O.D.’s than the new Evo.  Email me  at jmlutz1@yahoo.com for details if interested.  Thanks, Jeff Lutz 
     
  2. Mar 15, 2019 #2

    Danny King

    Danny King

    Danny King

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    That’s awesome. 
     
  3. Mar 15, 2019 #3

    Tom Foley

    Tom Foley

    Tom Foley

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    Good stuff !!
     
  4. Mar 16, 2019 #4

    Jeff Lutz

    Jeff Lutz

    Jeff Lutz

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    Thanks fellows ! 
     
  5. Mar 16, 2019 #5

    Eric Canto

    Eric Canto

    Eric Canto

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    Definitely a great option when you have thousands of dollars invested in multiple engines that the manufacturer has made obsolete.  
     
  6. Mar 21, 2019 at 5:56 PM #6

    charles siler

    charles siler

    charles siler

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    Thanks good to know :)
     
  7. Mar 21, 2019 at 7:09 PM #7

    gilbert galli

    gilbert galli

    gilbert galli

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    I reduced with the lathe the external sleeve of the rs evo,
    the lateral transfers of the rs crankcase are not perfectly aligned, it is necessary to enlarge them but it is less good than the rs evo
     
  8. Mar 22, 2019 at 2:49 AM #8

    Jeff Lutz

    Jeff Lutz

    Jeff Lutz

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    Yes, the transfer port passages in the case have to be widened. I always widened the ports even on the RS . If I do this mod for people I let them know all that needs to be done, the case boring is the main thing that’s critical and has to be a perfect fit. Jeff
     

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