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Old 01-08-2009, 02:56 PM
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Skeletor
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Originally Posted by MBR52
I have a Sirio CL7B and I had exactly the same problem. First I changed the head to the turbo head. This did help the problem slightly. I then opened the bottom end right up, so that the needle sits outside the needle casing, (really rich). I then adjusted the high needle accordingly.

Also the motor is factory shimmed for 15% nitro, so that may also be a thing to look at.
my Sirio is S21 BK EVO4 "STI KANAI EVO4 STI" 5+2 PORTS-ABC-SG SHAFT
and i was told to run it the the book says to and the hobbie shop says to so i ran the right racing
fuel
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