cam selection

the 285H will have a broader power band than the .509

the .509 is bigger in the duration and has a narrower centerline for higher rpm/peaky power, its a light switch cam.

as for et's?

hmmm....thats close.

but at the stop light.....i wanna say you'll get over on people more so with the 285 based on the better low end torque and the extra lift still taking you into the r's =HP

and Im figuring in that you may not have the ideal gears/convertor