Originally Posted by
bigmatt
I have always had a problem with the way it reads. I take it as to include the .3mm into your total. Only because mark says he is using a .1mm shim with 20% nitro for his mg-66. I use.2mm shims+ the .3 built in for a total of .5mm. In all my engines after break in. I use byrons 30% with a os p-3 plug. I have tried the osp-4 plug but did not like. My engines run great,fantastic milage,do not run hot and have plenty of power. I am not replacing rods and cranks all the time either. I will say you do need to know how to tune, as the window for spot on tuning decreases. This is what works for me in my part of the world. To me or in my personnel opinion the nitro you use really effects everything you do to these engines as far as tuning.
Same here bigmatt. .2mm of shims and Byrons 30% in all of
my GO engines. I stopped counting how much fuel has gone
through my Clocked 7 port after the ten gallon mark.
The sleeve has never been re-sized and the crank has never
been replaced. Just take the time to break-in the engine properly,
find the sweet spot on the tune and let it eat. My PTM 5,7 and .25T
engines also have had buku gallons of fuel ran through them
without any problems. I've tried to make paperweights out of
them, but they just want to keep on GOing and GOing and GOing.........