Unfortunately I don't have a definitive answer on track times. The new cam seemed to have more horsepower, enough to introduce some chassis problems. All the car wanted to do was turn right at the start. I found some things wrong with the chassis but that did not solve the problem. Turns out it was a bad slick. I got new tires and it went straight.

However tighter LSA means less valve to piston clearance. I knew that and checked it. It was tight but not as tight as some folks said they got away with on this thing called the Internet.

Turns out the exhaust valves were touching the entire time I ran this cam. At 6,450 RPM in low gear a head came off an exhaust valve and destroyed the block. I am in therapy, the head is being repaired and a replacement R3 block I had is in Maryland being machined.

Maybe I can give you a better answer next spring.