So I'm in the market for a new cam, hopefully to add some horses to a mostly stock build. I'm building my 302 with some 68 J-code mustang heads with stock-style rocker arms (lifted off a set of 71 heads from a rebuilt motor that turned out to have a junk block), stock-sized valves and stock-style pistons and I can't figure out what the maximum lift I can achieve without notching is. I'm thinking of just getting a high duration with whatever lift is possible without having to take the pistons to a machine shop. If this is a bad idea or anyone has any suggestions, some input would be greatly appreciated.
do they have..pressed in rocker studs...if so that may limit the lift...also...spring pressure for the new cam...
Ditto, with the pressed in rocker studs, there's a definate ceiling as far as cam profile goes. Piston valve reliefs are not the limiting factor here. The comp ratio will also come into play here, as will what pistons you chose (pin height and piston profile)
and... intake, carb size and exhaust...headers/stock manifolds...converter will come into play at some point...
I've read the Comp Cams 268H is the largest cam you can run with pressed-in studs, which sounds fine to me... Can 1.7 rockers be used? I too am building an engine and don't want to run any risk.
1.7's shouldn't be a problem, they're going to add .030 at the valve, putting the lift at .485, still well short of coil bind and piston to valve contact. The net effect will be similar to running an HO roller or the 94-2001 F4TE roller cam in it with 1.7 rockers.
