At my track here are the lap times we normally run:

12th stock: 45 laps, low 11's high 10 second lap times
sedan stock: 25 laps, high 11's
sedan mod: 28 laps, 10's
12th mod: low 10's

12th scale should always be faster than sedan as long as its with the same motor. you cannot expect a stock 12th to be faster than a mod sedan.

also as far as getting down to the minimum weight, i am actually an ounce over, however for most tracks it doesnt make a big difference, and i have some aluminuim stuff on my car that isnt helping, lol.

Also i would not recommend using a standard servo since it will throw off your handling, since thats alot of weight. also with an AE car, which i assume uses the dynamic strut front end, you want to run the angled servo mounts.