Not to get too far off topic on the subject of oils, but just a heads up many of you know about my KX500 kart project, and it's running, and in the early stages of testing. Once I have reliable drivability I plan on doing some in-depth jet testing, and gathering data. When I had RPM fab my exhaust pipe I asked Joe P. to add a EGT bung in the exhaust. I have a sweet Mychron 4 data acquisition HUD that will tells me rpm's, coolant temps, and EGT's (I can actually map and overlap long rpm and egt run sessions and save them) . I'm sure all of you tuners want to know how "safe lean" you can push a KX500 engine by means of EGT temps. I'd like to compare EGT temps simply from changing from 32:1 premix vs. 50:1 .
I tried as lean as a 162 main but that felt a tad too lean and my plug looked a bit too white) Thus far most of us have jetted by experienced "ear" and "seat of the pants" but fact is EGT tuning is hardcore real time data. It will be good info for all of us.
