Im getting hesitation at WOT and when i get over 3k i get a little sputtering and it sounds like little explosions in the headers. Ive messed with the timing, the carb and everything and cant figure this out. Ive checked the valvetrain and re-adjusted the valve lash. I cant find any vacuum leaks and im getting a pretty steady reading of 15 vacuum. Needle bounces a bit but that should be normal because im running a pretty large cam and i have roller rockers.

I rebuilt the carb (600 cfm edelbrock) and the car runs great its just the popping at wot. Only thing i know with the carb is a slightly bent fuel float. So the only other things i can think of to replace is a hotter coil or a bigger carb. Any advice would be appreciated.

 

I always start with a compression test when troubleshooting.

 

new engine.. high compression. Anyone else?