Give it a day or two- they are still working bugs out of it- and there are just bugs you gotta live with. It is a small site run by an individual, I think. Good info, though.
The basic drawback to the 14mm head at the 450hp+ level is fuel supply pressure AND volume. More correctly, the pressure caused by getting proper volume to it through the small supply lines. I think there is a special seal retainer to allow the VE to receive 25-30psi inlet pressure. Otherwise, you have good lower power (say, 250) and step on it, and you starve the pump for fuel, leading to lockup of the pump, and quick shut down of your engine in one fashion or another.
14mm heads are only recommended for those with deep pockets who want to go to the extreme in the VE HP race.
DP
The basic drawback to the 14mm head at the 450hp+ level is fuel supply pressure AND volume. More correctly, the pressure caused by getting proper volume to it through the small supply lines. I think there is a special seal retainer to allow the VE to receive 25-30psi inlet pressure. Otherwise, you have good lower power (say, 250) and step on it, and you starve the pump for fuel, leading to lockup of the pump, and quick shut down of your engine in one fashion or another.
14mm heads are only recommended for those with deep pockets who want to go to the extreme in the VE HP race.
DP