This build started in late 2012 or so. I was fascinated with autocrossing, most of my friends and social culture came from cone dodging. But I was ready to move on to something different to really try to win some events. So, I’ve purchased an old dusty Margay kart from a buddy and started my journey.
In retrospect, that was the wrong baseline for an autocrossing kart altogether and it would most likely have never been successful. But I was just starting with this karting thing and truth be told, I wasn’t fully invested in real karting as a sport, and didn’t know nearly enough.
Most of my knowledge for this build came from my experience with Nitro 2 stroke RC cars. With nearly 10 years of experience with those little engines, I had good knowledge of everything ranging from how to calculate and design tuned pipes to how to do port work. I love 2 strokes, and most of this stuff is very much second nature for me.
Naturally the first thing I did was to blast the kart around my neighborhood. In the winter. At temperatures below 10 degrees. Then immediately started tearing it apart: Shimmed the head to reduce compression, colder spark plug in, RLV A3 pipe was installed, retarded the ignition some, and formulated a 15% nitromethane emulsion. Didn’t change anything on the Walbro WB3-A carb but the needles and jetting.
We took the kart for a few test laps at Norway, my first time on that kart track. It pulled like a monster, clutch burning and the motor zinging all the way to 21,000 RPM Results were… Predictable?
…Perhaps just a result of gross inexperience?
…Or of too much enthusiasm?
I’ve murdered that engine. It was fantastic.