Well I finally got around to swapping cams in my truck.

Old cam: .502/.511 236/242 @ .050"
New cam: .555/.555 260/260 @ .050"

Combo is a 9.5:1 440 with stage V heads.

The PTC that’s in it now flashed approx. 4000 with the old cam, with the new cam it flashes 3800.

Last time I had the truck out with the old cam was November (great DA…) and last night was the first time I’ve made a pass with the new cam. I’m a little disappointed in the fact the truck didn’t really ET all that well compared to the old cam - lost 9 numbers in the 60ft. I know the fact that the DA was 2200 doesn’t help matters much.

My suspicion is that with the old cam the tight-ish TC didn’t really effect it due to the lower torque peak and that moving the torque peak up with the new cam has resulted in it not tolerating a lower flash. The positive take away from this is that the MPH was basically identical to the old cam’s best mph at great DA – so I know it’s making more power.

So, before I call PTC what’s everyone’s thoughts on the flash I need to shoot for on this combo?

Gratuitous photo…