340 cam advice
Yellow Rose, I will look into Racer Brown. Though I'm not willing to do go deep in gearing and stall. It will be 95% street driven.
Plymouth Power, it was bored over .040. I don't know my total cubic inch. Maybe someone knows the answer to that one.
Stock 3.31 stroke makes 346.2 cubes
I just know this; big cams, short strokes, and 95% street just don't mix that well.Unless you are willing to go into bigger gears and higher stallspeeds.And then you sacrifice hiway mode.A lumpy cam might sound great, but it is not the hot ticket for 95% street.
To go with those heads,you need a fast-rate of lift,moderate duration, high lift, cam, with a late enough closing intake, to keep the engine out of detonation at lower rpms. And let the lumps be what they will be.Those fast-rate/high-lift cams are pretty nice.
The thing is this; with typical street gears like 3.55s, and a lumpy cam coming in at 4500, this puts you at around 42 mph with a 2.45 low gear and 27" tires.So what is your engine doing between take-off and 42 mph? With decent tires, it is napping. With skinny tires it is boiling them. To get the engine past the napping zone, you will need a high-stall TC, and higher rear gears will also help. But the first line is to lower the rpm of Peak Torque. So what if it doesn't trap that well; it's not a track car.It's 95% street.
A street car needs torque down low, cuz most of the time you will be in second gear, and probably tooling around at 30 mph. With 3.55s, this will put the Rs at 1918 rpm(2nd). So when the hammer falls the 904 downshifts and the Rs climb to 3241(in first)plus TC slip.So that 340 better have some juice there. If not, you are back to more gear and a higher stall.If you over-cam it, you will be waiting for the power hit.
Now the 284/484 cam is not overly big. But you could have a lot more .050 duration with a fast-rate. OR you could have the same .050 with less advertised. The less advertised will will close the intake sooner and pull up the bottom end, while the greater advertised has that lumpy idle you want,and maybe a slightly softer bottom end.
As for my streeter, I care not about the lumpy idle.I do care about moving out.
So I guess the bottom-line is; What do you care about?
Is it the sound of the engine's idle, or the 6500 rpm shift point,or the hit? Or the zero to 30mph giddy-up, the hammer down and moving out? Is there hiway touring mixed in there? Is fuel-mileage a concern? Are you going to be piling on the miles during the summer? or just weekend bombing around?
Your cam choice depends on the answers.