Yeah I have that book too, but that’s not the one I’m talking about.
When I’m done in the shop today I’ll dig it out and post the title.
Again, this is why I advocate for using test pressures other than 28 inches.
Plus, unless the numbers are absurdly low or the low lift numbers are **** because the valve job is garbage I don’t get too excited what’s happening at those low lifts.
It’s hard to explain in typing. That’s why I’m not sure you understood my comment about top cutting the valve.
It changes the shape of the flow around the valve and it does work. The issue becomes what happens when the flow is going backwards and we all should know it does.
That’s a case where more flow made less power.
There are some really good threads on speedtalk but finding them is next to impossible. I can’t think of the guys name but he has been doing 50 degree stuff at least as long as I have.
The **** was flying fast and hot when he said he used it on his .480 lift, tow rig heads.
There are some who claim if you don’t have .*** lift them don’t do a 50 or steeper.
I haven’t seen that matter. Neither did the other guy on ST. But guys hear a rule of thumb and marry it.
I think you are to the point where you need to pick your port and do a set of heads and get them on the dyno. Then to the track.