Not that these #'s are going to do you alot of good unless you are willing to go have custom seat cutters made but... if you wanted to see some tech info....

Here's the seats that made 770HP with a set of 59* INDY heads...

Intake: 8MM radius,40*~.060" wide, 45* seat .051" wide, 60* .090" wide, & 72.5& bottom.... That cutter left with sharp 72.5 will be right at 90% throat at bottom of the 72.5 with proper bowl & valve sizing.

Exhaust: 8MM radius, 40* ~.040" wide, 45* seat .051" wide, 60* bottom. Blend everything away by had except the 45....I use that exhaust cutter on anything that I use a 45 seat on.



Good intake seat for an Edelbrock: 4MM radius, 35* ~.060" wide, 45* seat .051" wide, 60* ~.090" wide, 72.5-75 bottom. Set throat at 90%, intentionally sink seat until 35 degree top cut is ~.030"-.040" wide, & sink exhaust seat to match. I've had E heads go 9.80's @ 131 @ 3020 lbs with a 410" roller motor & 10.01 @ 129 @ 3000 with a flat tappet 408 with that basic valve seat cut on it. So if you can't make power with it, your problem is'nt in the VJ widths/angles.

My 50IN/50EX

52IN/55EX cutters are pirated from a Nascar shop & I won't be divulging those #'s. Only use that stuff on heads that have combustion chambers designed for it, raised ports, & alot of cam lift & ramp speed. Have never tried that stuff on the more pedestrian heads because I don't believe it will work, although if someone wants to take a gamble on their stuff someday I'll try it. I've found that sticking to "basics" usually makes more power than playing with the "trick of the week" sometimes. The simplest most basic motors I've done have made best power.....