I’m pretty sure that has been answered.
From a flow perspective, the “equivalent” Indy head to the TF270 is the EZ CNC295........ and that would be after the seats were recut and blended on the EZ head.
The EZ 295(cnc ported EZ head) outflows the EZ-1(unported head), and the TF 270 outflows the EZ 295......until the valve seats have been recut and blended in the 295.
After the EZ 295 has been tweaked, it flows basically the same as the ootb TF 270.
I haven’t had a EZ CNC 295 in the shop since the new owners have taken over, so it’s possible they are doing a little extra finish work that might make them the flow equal to the TF 270, without additional work being required.
But, the ones I’ve had here through the years needed some tweaking to be able match the TF 270 flow.
Nothing major at all...... but tweaking.
The unported EZ-1 isn’t going to match a TF 270 for flow.
