I have an 06gt mustang with auto, underdrive pully, 4:30 gears, c&L race cold air , 93 octa race tune from Bamma chip and ET Street Slicks. what ET should i be running in the 1/4 mile and how much hp should i have to the tire?
It all depends on traction off the line. My buddy has all the mods you have with a manual tranny and he ran mid 14s b/c he couldn't get any traction.
I have an intake, bama tune, and full exhaust besides headers and I ran 13.5 at 102 mph. Mine is an automatic by the way on stock pirellies. (which to my surprise hooked extremely well)
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-A7X- ~Stang Syndicate Boston~*2006 Torch Red GT*10/10/07 Performance:Borla FRPP Stingers w/ True Dual Midpipes, Magnaflow High Flow Cats, JLT CAI, Bama 93 Race Tune, Ford Racing 4.10 Gears, Nitto 555 Extremes. Visual: Black AVS Tail Light Trim, Honeycomb Tail Light Vinyl, Black Racing stripes, 35% Window Tint, Trunk Blackout Panel, Billet Antenna Delete, Mirror Covers, 17" Konig "Further" Rims, Quarter Window Louvers, 20% Tinted Head Light/Turn Signal, Boss C-Stripes, CS/GT C-Scoops.
As for HP you probably have about 290 to the rear wheels. If you do in fact get traction, my guess is you can break into the high twelves but probably be consistant in the low 13s.
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-A7X- ~Stang Syndicate Boston~*2006 Torch Red GT*10/10/07 Performance:Borla FRPP Stingers w/ True Dual Midpipes, Magnaflow High Flow Cats, JLT CAI, Bama 93 Race Tune, Ford Racing 4.10 Gears, Nitto 555 Extremes. Visual: Black AVS Tail Light Trim, Honeycomb Tail Light Vinyl, Black Racing stripes, 35% Window Tint, Trunk Blackout Panel, Billet Antenna Delete, Mirror Covers, 17" Konig "Further" Rims, Quarter Window Louvers, 20% Tinted Head Light/Turn Signal, Boss C-Stripes, CS/GT C-Scoops.
I have an 06gt mustang with auto, underdrive pully, 4:30 gears, c&L race cold air , 93 octa race tune from Bamma chip and ET Street Slicks. what ET should i be running in the 1/4 mile and how much hp should i have to the tire?
What size tire are you running? My guess would be low 13's if you're running a 28-29" tire.
I've found that hp on one motor is completely different from the one next to it on the assembly line. That is also how people get burned when buying a new car. One can be great, and the next one a POS.
there is no reason for you to NOT have traction with the mods you have, being automatic, and using Et streets...so, i'd say a 12.8-13.2
get a nice convertor and you'll be around a 12.6-12.8 range for sure
a friend on my team has basically the same but on a manual trans and he hit a 13.3 on street tires...he is buying et streets and were hitting the track next week. He should be in the 12.5-12.7 range on the et streets.
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TRICKED OUT RACING 1991 Mustang LX Coupe 13.12 @ 101.3 mph (stock uncracked motor) Best 60 ft 1.64
what ET should i be running 
all motor now.Don't ask.
