Well for those of us who build motors for classes that have a comp limit (not found in drag racing much) I say put the right cam in the car to get it down the track and make the most compression you can for the gas you run.
car weight 3550 and 4500 stall and 1.76 glide my max rpm will be 7200 4.1 gears 28 /9 tyres which cam would work best roller 260/[email protected] or one with 270/277 same lift s on 108/lc for 11.5 satic comp
All things being equal, the greater the compression the greater pressure drop the intake port feels. So, not only cam timing but port design plays into the game as well. All RPM related, of course. That;s probably why you've seen cams from "250 to 280 @ .050". 30 is a huge difference for the same type of deal.
Depends on the lift but my thoughts on those two cams is the big difference is that the larger needs more stall, especially if you use a glide. If I had a lot more data it would be a easy cam design for me. The right cam is cheaper than screwing around setting up the car around the wrong one! Shoot me a PM and lets see what we can get in there for you.