Originally posted by theRED5
I've been involved in RC modeling for my entire life, my Dad flew controlline planes and RC planes when I was just a kid. When Byron's Fuel first came out I was flying 4 stroke airplanes, and they were the first, as I recall that made 4 stroke fuel. For the last 5 or 6 years racing cars, I've used Byron's fuel and never had an engine blow up because of fuel. I've always liked that they use "Klotz" brand racing oil, and find that the engines are very clean inside the combustion areas.
But lately, I've been wondering, if your fuel leaves deposits, aren't they increasing the compression ratio, boosting the performance of the engine?
I have been involve in this hobby since 1976 (13 years old) and most of my life was running FAI fuel (80% methanol and 20% castor). Then I come to RCcars and here I tryed different types. The best fuel is defenetly O'Donnell. It doesn't leav any residue nowhere-cranckshafts are always clean and no rust or other spots, even if I leave engine without washing for more then month-I never clean my engines.
About build up of varnish on botton and top of piston-vernish is engine killer. It works as insulation and don't let survaces to cool down. They have to be removed as they start build up.
Top of the piston and combustion surface on botton must to become dark brown on new engine after 8-10 tanks and it should be not a build up, it just very very tiny layer. From most of the fuel I did indicated real build up and after I have tryed O'Donnell I don't have this any more, this is why I don't clean my motors-simple no need it.
It is very easy to see the difference between "good" or "bad" brown build up-"good" is shiny and "bad" is not. "Bad" build up will come out easy with just by trying wipe it off by finger and "good build" up will not come out at all, unless sand paper used.
Edward
Edward