Hey Monty,
I'm just about to finish the final part of breaking in my P5. This is by far the easiest engine i have ever had to break in. No problems what so ever. Starts first time every time. bought some C5tgc and C6tgc for this engine. Cant wait for the race on Sunday. Just wondering after how many litters should i be ok to put a race tune on?

now its about 3 litters in and i've got it running maybe about 1.5 hrs on the rich side to a good race tune on the HSN. the LSN is perfect now. Idles very consistent. Loving it so far.