12 second speed density

[Yan88gt]

I've finally find out how to launch with those slick with a 1,72 0-60. I was reward with a 12.84 at 104.9 mph. I'm so proud, everyone told me that it was nearly impossible and that i would need to switch to mass-air. I've almost done everything to my car, ported stock heads and intake, stock cam with 1.7 rr, pulley, cold air kit, electric fan, adjustable fpr, remove all the weight that i could, superchip, shorty headers, 2 1/4 off road, magnaflow catback, hurst shifter, 3.55 gear. What can i do to go faster and keep my N/A speed density set up? Windage tray? Aluminium flywheel( this thing work great on a Honda but on a mustang?!?!)Had compression ? Anyone who have crazy speed density setup? Thanks guys!