!!!!!Loss of power at op temp!!!!!!!!

[BLWN 4D]

I have a 91’ stang with all the bells and whistles including a Vortech. For the first ½ hour or so, the car runs strong. But as soon as the car gets to operating temperature, it feels like the car is dropping cylinders! I am still making boost and the car roars like I’m hauling *** but it’s all show. I couldn’t even pull in front of a S-2000 the other day!! As you can tell this did not make me happy a happy camper. The temp gauge goes up to about the half way mark and the car really doesn’t overheat. I live in So CAL by the beach so the temperature is in the mid to lo 80’s. Not more. I already have a 3-core and 180 stat. Any suggestions you could make or things for me to check would be appreciated. Thanks in advance.


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Cobra 306, Edelbrock heads,E-303 cam,1.77 Rockers, Vortech manifolds, Vortech supercharger, Tremec trans,aluminum fly wheel Richmond gears, Stillen brakes, ect..
400 RWHP