Re: Air Con v Performance
what you are describing is perfectly normal. when the a/c compressor kicks in at idle the sudden current draw drops the rpm, the ecu responds by increasing the rpm but it can take a few seconds to stabalise.
the a/c is designed to switch off automatically when you need power, but this only happens under full load at higher rpm, so the rest of the time your a/c will noticably reduce performance (and increase fuel consuption). the best thing to is set it to "auto" (climate control) and select a temperature that is not too cold (21 works well this time of year). if you do that the a/c will remain on without actually using the compressor unless the cabin temperature gets warmer. this means the a/c will be on far less and you still benefit from regular use of the a/c to keep it in good condition. best of all you dont suffer from performance loss very often.
if it really bothers you just leave the a/c off at all times and get into the habit of leaving it on for half an hour each week, that is all that is required.
there is a procedure you can perform to change the setting that switches the a/c on each time you start the engine, then you dont need to switch it off every time. i cant remember how to do it at the minute but its on the forum if you search.