Hey nice to hear from you but this here is the WATERPUMPER forum, 944/924/968, we dont like you 911 types. HAHAHAHA just kidding, I was always told to leave the AFM alone, and thats why I now have a MAF kit. anyway check this site out, its for the 944 setup but maybe it will help you out.
http://frwilk.com/944dme/ Check out the AFM section, also for future tunning you may want to get a A/F ratio gauge, here is another link, theses guys have eveything you would need to tune your ride
http://www.splitsec.com/ Good luck