I am the original owner of a stock '03 Cobra with less than 19,000 miles. Periodically, after full-throttle acceleration , RPMs fall (close) to idle during up-shifting even though I stay below the red line and make a snappy shift. I notice the problem when I attempt full acceleration in the next higher gear. For a second or so, the engine will not rev and the super charger is silent. RPMs will then build and I have super charger action again. Any ideas as to the cause would be appreciated. I have had no similar problem with any normally aspirated performance engine with a manual transmission.
I answered your question as soon as you posted it over in the tech section. This is the third time you've posted the question, are you forgetting where you put it? Click here: http://forums.stangnet.com/showthread.php?t=740534 U.M.