[andy669]

Intake port volumes can be extremely mis-leading, as well as comparing a companys advertised flow numbers versus a shops numbers.

The TW on average has an intake port that is a full half inch shorter than most inline ford heads, making the port volume look 'low'. Comparing cross sectional area is worthwhile.

Flow numbers from bench to bench can vary alot. Theres so many different calibrations and ways to flow cylinder heads no 2 benches are the same. I've seen 30 cfm difference in some peoples numbers, from the bench that I use.

Flow them back to back on the same bench would be the best way to compare numbers. And the head that flows the best might not make the most power either.

Andy