Yesterday was my first race with this engine after a good break in. I put 1/2 gallon of VP Powermaster break in blend through it, then I took it to round 1 of our Arizona KBRL series yesterday with another 1/2 gallon of break in blend with 50% VP powermaster 30% mixed in. The engine still has mechanical pinch, still has the break in shim installed, still has a rich tune, and still has a high idle and holy crap it was awesome all day!

M2C 4 shoe variable weight flywheel with no weights, 2 yellow springs, 2 black and 4 hard regular aluminum shoes.

Nova Rossi 9901 pipe with standard header.

OS P3 Plug

Power was insane from bottom to top, not lacking anywhere!
I did not get to time a tank but I was coming in after 6 minute qualifiers with fuel at the seem on my tank.

Track was small and tight and mostly low throttle and blipping.

Not one hiccup all day, temps stayed in the 230-250 range. never touched the tune, just adjusted idle periodically as pinch was reduced.

I am sold on this engine so far, especially at this price point...