Cam specs and reversion have been done to death here on the forums, and I've searched and researched for an answer to this question to no avail. What is the maximum degree of overlap you can get away with when using logs or wet headers?
It's been talked around, but never directly answered. I've got a buddy that's looking into cams for a mild BBC 454 build up (log exhaust on a V-drive) and he could use the information to aid him in the selection.
I'm running a Clay Smith hydraulic flat tappet 108 centerline, 244 duration and .570 lift with 28 degrees of overlap and don't seem to have any problems. With my combination,the cam produces a very flat torque curve on DD (in the 400 ft. lbs range all the way from 2500 rpm to 6500 rpm and peaking at 502 ft. lbs. at 5000 rpm). The horsepower curve is also very flat and peaks at 525 hp at 6000 rpm. This is similar to what he's looking for.
Thanks
Dan