Originally Posted by
plus2ss
Ive got a new hobby 9 that i just finished breaking in using the heat cycle method. After about 30 minutes worth of heat cycles(letting it cool to room temp at bdc between cycles), i slowly started to tune it. Now ive got around 60 minutes of total run time on the engine. Its got great compression, but the pinch is almost already gone. My GRP had a tight pinch for the entire first gallon. Is this normal for an RB, or did i do somthing wrong?
It may depend on what percent fuel you use. Ive found 30% to be a little hard on motors. With the technology of the newer engines today, I dont really bother with 30% anymore. I think it opens up the sleeve too fast. I use 25% on my Hobby 9 with almost 2 gallons and its as smooth as butter!!!
I still have good compression. Its really hard to compare it to a GRP or any other motor because some have tighter pinch than others. Take care of that motor and maybe you will get 10 gallons.
