I suspect the intake short turn rework isn’t very aggressive.
The port certainly “looks” like it would flow more than mid-250’s.
But...... you’re also into the “racing flow benches” thing to some degree.
I’m sure, like myself, most flow bench owners don’t consider numbers from other benches to be “apples to apples” with theirs.
Aside from possible variations in the bench itself, there is also the fact that different radius plates/devices are being used by the different shops, which can definitely impact the flow numbers.
The intake ports on the Mullen heads look to have more rework done to them than the TA heads I went through this spring........ yet if we try and compare the numbers as apples to apples........ they would appear to flow less.
“If” that’s how it would actually go down if tested back to back(and I’m not saying it would)....... I can only imagine the short turn on the Mullen head needed a little more attention.
View attachment 1715637388
For comparison:
Lift—— in/ex
.100— 63/47
.200—130/99
.300—192/131
.400—237/148
.450—255/155
.500—259/159
.550—251/162
.600—253/165
.650—254/168
View attachment 1715637392
I guess what I’m saying is....... I’m giving Mullen the benefit of the doubt and that if I flowed that head on my bench....... I’d expect the numbers to be at least as good as the T/A head above.