Jesse Open

The problem with the OS system is how and where the case vent is introduced. They dump it in the intake between carb and valve where it functions much like a variable air bleed. As such it can upset mixtures intermittently. I have been introducing the vent ahead of the carb, via a side connection at the velocity stack. Zero problems here with glow fired methanol.

A fellow over at RCG has been doing likewise with sparked gassers and has never mentioned issues with spark plugs, nor any running problems. Aside from a small issue with the stack

Check out the video:
https://streamable.com/sv5kqw