stang135.0

I have a 2013 mustang gt auto. Have 3.73 gears with jlt intake with bama 93 race tune with 305 35 20r mickey Thompsons street comp. Wonder why I'm only reaching 108 Mph in the quarter mile? My RT time is .149 60 ft 2.047 1/8 8.470 1/4 12.994 Mph 108.66. Elevation is about 500. 78 degrees.

88 orangepeel notch

Welcome to the forum.

Have you checked the D.A. for the track on that day. 78' isn't that hot but what was the humidity ? There's online calculators that will correct the time to compensate for bad air.

Are you spinning at all ? Your 60ft could be a little better with those tires. This won't improve your trap speed, but will improve your ET by alot.

Your times aren't that far off from the couple of Coyotes I've run personally. They've trapped anywhere from 108 to 112 usually. It all depends on conditions......

You may want to start a new thread in the Tech section, the one specific to your year Mustang or the Street/Strip section. Someone there may have some good advice....

S197 GT

Welcome!