English is not his first language if you look at his profile. Give the guy a break

 

Hahaha I just noticed that too!

 

well at the begining it was happining only during the day when its realy hot and the car was runing some time, with air condition later it becom stronger and stronger like when the car is cold i turn on , drive for 10 min get it warm up the car goes very good nromaly after some time driving the prefarmance fall to 50% or so

and now its always like this

 

It is true, Colorado Springs is no where near any respectable English speaking nation.

 

 

check all your intercooler piping

 

woah dude, how are you worried about your car with all the fighting going on over there? I would think your cars performance would be the last thing on your mind.


Anyway, go with what MAD VIII said, check the cat first. That would be my guess.

Good luck and be safe.

 

but i dont have a cat.......... only the one that siting on the down pipe itself the seoncd one is gone long time ago

 

Yeah uh that was warrtalon with the improper english, not the poster

 

Is this the first summer season that you've had with the Evo?

I know my Evo feels DOG slow on hot summer days - it seems the heat affects the Evo more than other cars that I've driven. It might just be that.

 

Tell that to Warrtalon. I was pointing out Warrtalon's error in jest because he was making fun of our Israeli Evo enthusiast.

 

Sounds like heat soak? How hot is your upper intercooler piping?

Sounds like your first modification should be "water injection."

 

Put in some race gas and see if that helps. Also, do some pulls with your AC off and on.

 

yes i got the car only 7 month...

fisrt summer with it

anyway in the night when its not hot without AC

the car with the same problem

so defenetly its not the heat out side

 

Just a guess but are both of the little screws still in your intake scoop?