Do evos run worse in hot weather?(75+) my cars felt sluggish since it started getting hot.

 

I would think that all cars run worse in the heat.

 

Yes, you have to imagine that w a forced induction vehicle, youre more susceptible to ambient temperature. All that warm air entering the engine is less efficent, cold air is more dense. Id get into thermodynamic properties but im on my cell.

 

Maybe a dumb question, but should vacuum drop a little in
heat?

 

Is your intercooler big enough for your mods?

 

Ets plus short route piping. During day doesnt pull hard. Once gets later in the day it pulls nice..super annoying

 

It will always be that way. Colder air is more dense. More air more power.

 

Probably need more freon in the intercooler for colder temps

 

 

Please assure me the freon statement was a funny haha.

To the OP:
Yes you will be down on power in the heat. Search the internets and you can find a rough estimate of how much power you may lose for a given increase in temperature and vice versa.