Lean vs Rich: I try to achieve basic understanding

[Bimodal_Rocket (Dom Callan)]

Thanks TJ.

I have experienced “four-stroking”. When I went to test the 100cc at DKC, it wasn’t hitting the top end properly. I brought it back to pits and Mike said it was “four stroking”. He hopped in the kart and proceeded to tear around in concentric circles while fiddling with the needles. Once he was done, it ran fine and hit top end and sounded normal.

Edit: TJ brings up Al and EGT, perhaps this thread:

Horsepower and humidity

https://wahiduddin.net/calc/calc_hp.htm Here’s a calculator, online, if you’re interested in knowing how much humidity effects horsepower. At sea level, at a standard atmosphere, (77° at 29.235 barometric pressure) in the range of 50% to 70% relative humidity, the correction factor only changes .009 %. From .017 to .028. Let’s see; 15 hp x .028 = -.405 hp. 15 hp x .017 = .255 hp. The difference being .250 hp. Hardly momentous, but still, something to keep in mind. And the fact that you a…