Originally Posted by
engineermike
Thank you, this is helpful. Not that you need my analysis, but it is interesting that his air load peaks around 5700 rpm, where the spark timing is 10-13 deg. Then the load starts dropping dramatically and timing increases to 16 deg. I'm guessing this is the Stage 1 that uses the stock throttle body? I know Edelbrock spins that 2650 really fast, which gives great low-end torque, but the stock TB starts choking it up top (if it's Stage 1). His 16 deg at 1.3 load and 12 deg at 1.5 is about what I can get as well, which aligns with @paulsmithjr comments.