Originally Posted by tws_andrew
I am ready to pull the trigger on stage 3. Built a custom midpipe and exhaust but really with no verified times, dynos and my previous experience with Dinan being so bad this is tough. Does anyone even have any indication of speed or performance increase based on racing other cars before and after. I know it is not scientific but I need something. Lots of seat of the pants info but the only drag info was Middly and he had terrible times but that was with his cutouts and 21" wheels. Anyone...
I did have a 12.4 at 110mph with stage 2 and 20s....I haven't seen another F10 do any better than 12.4-12.7. like lacster said to me, you wont get any better than a .1 - .2s difference even with an added stage and he was exactly right.
My feeling is the car would do a 12.2-12.5 even with Stage 4. thats of course with xdrive.