[NA18CamaroSS]

A misfire in cylinder #8 is not a tuning issue. Most likely an ignition issue. Swap the #8 plug, wire, and coil to another cylinder and see if you can get the misfire to occur again. If the misfire moves to another cylinder, you have your answer. If the misfire stays at cylinder #8 it may be an injector. Worse case scenario is that you have a mechanical issue with the engine.
The problems described in your first post are definitely tune related and a misfire will only exacerbate the problem.

[KingLT1]

^Agree... Side note I am also curious on who spec'd that cam? A cam with 9.5 degrees of positive overlap is something I would expect to see in a NA heads/cam LT1 with a Hiram/converter and a compression bump. Not something I would stick in a Positive Displacement supercharger application for road course racing.

[Camaro1973]

Originally Posted by KingLT1

^Agree... Side note I am also curious on who spec'd that cam? A cam with 9.5 degrees of positive overlap is something I would expect to see in a NA heads/cam LT1 with a Hiram/converter and a compression bump. Not something I would stick in a Positive Displacement supercharger application for road course racing.

Agree, most aren't more then 5 degrees of overlap that ive seen. A 113 LSA, this is probably the problem along with a bad tune and bad recommendation on a cam.

[LiqTenExp]

Originally Posted by NA18CamaroSS

A misfire in cylinder #8 is not a tuning issue. Most likely an ignition issue. Swap the #8 plug, wire, and coil to another cylinder and see if you can get the misfire to occur again. If the misfire moves to another cylinder, you have your answer. If the misfire stays at cylinder #8 it may be an injector. Worse case scenario is that you have a mechanical issue with the engine.
The problems described in your first post are definitely tune related and a misfire will only exacerbate the problem.

Agree and let me take it one step further. Remove the coil pack connector and inspect that each contact is locked into place within the plastic connector. I had this exact same issue relatively speaking and one of the contacts was loose and would cause the same symptoms. Believe it or not it would work on the dyno and fail on the street, likely vibration related.

[CW3SF]

Originally Posted by Z OH 6

Talk to your tuner, the car should be tuned with those mods. If you're still having issues, your tuner should be able to sort it out.

This. Your tune should completely fix this issue. With the JRE my M6 takes off in 1st just like any other car.