Now we have Bloomer porting a speedmaster/steven sun aluminum china head, with conventional ports, no offset rockers, and seemingly making W2 power. I haven't had a set in my hands or on my bench, but I'd be skeptical.
What’s there to be sceptical about. Guys have been to the track and laid down numbers.
I say this is all seriousiness, having had a very healthy W5 car, 13 to 1, sizeable roller, dominator, etc, etc, than when I had it ran 135 mph at 3350. This on bias tires and super stock springs.
Now I am seeing guys run that mph at the weight on pump gas with smaller rollers with these non offset heads
I think these heads are already as good as W2 heads all day, and in the conversation with W5 heads.
Having run both heads, I think my opinion is very valid.