9secondflat

i am a bit confused, the corvette i am buying is a 96 lt4 with zz9 cam installed, all of the specs i see at quoted with a 1.5 rocker, i thought the 96 lt4 came with crane made 1.6 rockers for gm. what would the lift work out to be with a 1.6 ratio ?


Duration @.050 is 212/226 .483/.520 112 LSA this is the zz9 spec
what is the difference in lift when you use a 1.60 ratio is it just adding .1 to 483= 493 and 520+ .1= 530??

how is this different from a Hot cam with a 1.60 ratio

thanks in advance

Curveit

You divide the lift by 1.5 to get the Lobe lift number. Multiply that number by 1.6, 1.65, 1.7 or what ever ratio rocker. .483 = .322 x 1.6 = .515 lift. .520 = .3466 x 1.6 = .555 lift. I just add .035 to whatever the lift is, when I don't need the exact numbers. I personally add 2* duration when going from 1.5 to 1.6 too. So you're looking at 214/228 & .515/.555 lift. Performance should be very similar to a Hot Cam.