V2 log Misfire on cylinders 2 and 6 Superknocking on cylinder 4. Pulls well until the misfires. Cylinder 4 is a index 12, recent plug change as well. But cylinders 2 and 6 are still index 11s and will be replaced asap.
E85 mod stock rev 1 Normal driving and WOT pulls. Limp on pull 1 and stay in it. Shut off/on then resume pulls. No limp after.