Dave
Well-known member
:good: Correct Joejoedrum":2sb4y6fx said:the natural tendency of the wings carbs is to go rich in my opinion.....i think daves statement pretains to racing conditions mostly or motors in that range of tuning.....
but, a Wing (or any engine) can really only go lean if you mess with carb settings and or jets, if you mess with the ignition timing or if you mess with the fuel. I think most older, big miles motors tend to go rich as result of wear in the carbies and failing of the ignition
Easiest thing with rich v lean Gerry - petrol is a liquid and just like tossing water on a campfire, the more you pump into your motor the more heat it will take out, this is not the scientific way it happens but it is the way it works. So if you dont toss enough petrol in your gunna be burning lots of oxygen. Oxygen burns really hot because its a gas. Again not correct if your into science but fact is every time your engine breaths in you have a blend of fuel and air (liquid and gas) and the liquid cools and the gas just burns without cooling stuff down first. Of course if you cool things down to much your fuel (liquid) wont fully evaporate to a vapor (gas) and wont fully burn, this is called 'very rich' :read: bet I just made it more confusing :idea: for you Gerry. Heres a easy (AND DANGEROUS) thing you can try OUTSIDE. get a siringe filled with petrol and 'squirt' it thru a flame, note how it becomes a stream or ribbon of flame. This is 'rich' Now pull down your pants and 'pass wind' thru a flame and see just how much more aggressively gas burns. This is 'lean':smilie_happy: unless you had the curry in which case it could be ................... I'm gunna stop now