[Formulajones]

Originally Posted by charlie66

What do you think about the other 3 versions of Johnsons that butler sells compared to the ones you're talking about? Are they not as good of a lifter? I don't understand why the Hy-lifts were made where they won't rev past 6000rpms where the other ones will. I know the band is lower, but does that make them better and more money. I don't care about the cost either. I'm just trying to understand why.

Johnson's are a good lifter. Hylifts do rev. I have a set in a 327 I built and it made peak from 6700-7000 and started nosing over at 7300.

But like I mentioned earlier sbc's have lighter valve train components by nature because everything is smaller, and I can get away with less spring pressure. That engine is 145 on the seat.
When you start getting heavier parts like a bbc, like a Pontiac, like a BBF, you'll need more spring to control it and in those cases the hylift may not rev as high without issues. But when we're talking about big engines like that in many cases they are done by 6000 rpm anyway so it doesn't really matter.