Carb help

What does it do when you get on it, or are running above 30-40? Does it just do it when you are cruising or when you try to accelerate without stomping it or getting the transmission to kick down? Does it do it at low rpm's? High rpms? steady rpm's?

I don't claim to be an expert on anything, so please take anything I say as just a point of reference, and something to look into. That being said,... I have been doing a ton of reading as I get ready to build the motor for my Charger. I have heard of others having issues running 10:1 on today's crappy gas. I was talking with the guy who is building the 440 for my Charger, and he recommended not going over 9.25:1 or 9.5:1 if I am planning to run on pump gas.

It if it is an issue of not having enough carb, I would expect to be running lean. Have you pulled your plugs to see if it looks like you are running lean?

Is it possible that it just doesn't like the 91 octane with the 10:1 compression you are running? Have you tried running 93 octane premium, or adding some octane boost to see if it gets better?