Tlowes 250 dyno engine made 300 HP with just flat tops and a 70cc head(9.8-1 compression)
I do not think it was ever published here on the outcome of the 250 dyno results.
A.F.A.I.K., I do not think the 250 ever made over 280 HP N/A?? & w/the turbo, which helps a lot made how much HP? 350 or so?
Tlowe?
MBHD