I don't know if eliminating the porus piece in the precombustion chambers would increase the power, I know it would increase the noise Anyone ever tried this. Reason I'm asking is we have a few old engines of that type that I would like to play around with, see what type of power we could get out of them (remember the c199 I think it was, it was the same engine, highly modified that won the 24 hour race at le manns in the late 60s or early 70s)