Quote: Roller cam, 266/272 at 0.050, Lobe lift on the cam is .393/.401 With the 1.85/1.70 split ratio rocker arms the net lift was .706/.661
Quote: We ran both the Super Victor and the Mopar 337 intake. Best power was 1.85 intakes with the 337 intake.
I assumed the 337 intake would be down 15 or 20 hp from the Super Victor but actually the 337 intake made the most power. Not sure why that is the case but it did.
Peak power with the 337 intake was 797 hp [at 7300 rpm]. The best pull with the Super Victor was 791 hp. Both of those numbers were with the 1.850 rocker arms.
That cam really surprised me. For such short duration at 0.050", on 505 CID, it really made peak power higher in the RPM range than I thought. Obviously the good flowing heads have something to do with that, but I wonder if the cam profile above 0.050" tappet lift is "special". Like you said, it isn't crazy in total lift.
What was the duration at 0.200" tappet lift? I wonder if comparing a lobe made for 1.85 ratio rocker and one for 1.5 is making the duration appear different. ie at the same valve lift (say 0.050 x 1.5 = 0.075" valve) what would the duration comparison look like? MM305S solid at 0.075" valve = 279º, Roller at 0.075" valve (.075/1.85=.041 tappet lift) = ???º (close to 276º?)
And maybe that 337 has more cross section between the plenum and head than the Super Victor? (tapered to same port window obviously) I would think that could be part of it too (505 CID, 7300 rpm, = flow needed).
