I'm running a Rajo 4 valve head, domed pistons, dual exhaust, dual intake with two Zenith S4BF carburetors (hoping to get my hands on two U&Js and see what that does). Currently have a Stipe .280 cam, but wondering what cam I could run that would give the most top end. Exhaust valves are a 351W.
What says the speedster crowd? Would I notice a difference with a .300 lift full race cam? I think that's about the biggest thing that will fit without modifying the block. And if so, where could I get one of those?
What type of RAJO 4v do you have, original or repro? Originals had 1:1 rockers and would benefit from higher lift, but many repros has 1:1.5 rockers and should have plenty of lift with a std cam already.
I would have to check but my Mom's speedster shes using an A cam with the lobes knocked down and 1.5" rockers (8V Rajo, previously 8V roof). For my T Ive got a custom grind from crower based on the T winfield masters he has.
Seth, you might check with Stan Howe and see if he has any U&J carbs, they are $1000.00 each.
Tom Carnegie sells a .300 lift cam that is regrind on a stock cam core. It has been the cam of choice in the MT 500 for years.
Bill Stipe grinds a .290 lift cam. I have read it lacks in low end torque but gets after it on the top end.
Everyone I know who has a decent running F head is using a dual pattern cam.
That's a little more like what I'm talking about - surely there's gotta be a way to maximize what I've got.