I think that lift is with 1.6 rockers looking at bullet cam stuff.
I also feel the open is a bit much.
I have ran [email protected]
.050 with 1.6 rockers and with that it had .571" lift and lashed at .026"
My open pressures were 345 and I used a Howards direct lube lifters and Joe Gibbs Break in oil and their Hot rod oil after 2 breakin's.
That cam lasted a few years and is still good but the vehicle was crashed.
I cringe when i get to the 340 psi open area and lately found I did not really need that much open pressure.
The high seat pressures are nice though.
Last 2 cams in my own vehicles got some really light stuff. I went Ovate Beehive springs with tiny retainers.
270 spring rate on an old 280H magnum flat tappet with 110 seat and it will rev to 7500 and then I get valve float.
Another is a Roller with [email protected]
.050 and .492" lift. 313 spring rate with 130 seat pressure.
It will rev 7200 rpm lickity split.
Yea I know not as much lift but i proved to myself I did not need all that open pressure.
A solid flat tappet 252 @ .050 duration .536" lift with 1.5 rockers will be taking place of the Roller soon and keeping the same 130 seat and 313 rate springs.