White smoke decelerating
 

I am running on e85 and a catless header followed by an edelbrock supercharger. I just noticed today that while decelerating after pushing my car pretty hard that there was white smoke coming out of my exhaust. I've read around and it says it could be a blown head gasket but I wanted to make sure if being catless and having e85 would do this.

added info coolant temps were 192F while oil temps are 205-228 at it's highest

Check your oil for emulsion on the dip stick and also check your coolant reservoir if there's oil in that tank.

As above its burning oil or coolant, note the oil may be from supercharger if the seals in the SC have gone, check the SC oil levels.

It may also be just a PCV valve or catch can overfull.

might be your cats, is there residue?

Is it really humid there right now? Could just be water vapour. The SC, catless system and E85 all could contributed to more vapour in the exhaust than normal in really humid conditions.
Next time it happens roll down your windows and stop quick as possible so the cloud passes you and you may get a whiff. coolant smell sweet, oil smells like oil and water vapour will not smell like anything (or could have a slight sour odour since catless).

If your intake is hooked to the pcv valve like a N/A or turbo set up its going to be blow-by. Basically you hit boost it blows thru the pcv and the when you let off and go to vacuum it sucks all the oil vapor into the intake. The pcv can not even hold 3 psi.