From what I’ve seen..... with stick cars in particular....... is that “usually”a cam that’s a bit too small will run quicker than one that’s a bit too big.
This is what Scott Brown told me. I was running a MP590 prior. My car picked up a bunch after the Scotty cam was installed. Heavy stick cars are a different breed from auto cars. No insult intended. Just stating what I've heard and learned. Also, with my combo, I went to the 1.6 rockers and picked up a bit more. I run the 1.6's on both valves.
