So my first time to the 1/4 mile ever with my truck 03 4.8 LT no cats CAI 4.56 gears servos and a wheatly tune and i ran 15.9 its an ext cab 2wd is that about right im just wondering with my lack of experience or if im doing something wrong and if you guys could post some of your times just so i can get an idea of what mod i may want next

 

I ran a 15.5 with an k&n cai, dual exhaust and a mail order tune. Dropped to a 14.9 when I added the 4.56 gears and the vett servo. Then a 13.2 with heads cam better exhaust built 60e and a 3600 stall converter. and an in person tune. Then a 12.02@111 with the supercharger, ory and single 4" exhaust and 4l80e
My truck is an extended cab awd. About 5400 lbs with me in it

 

What MPH? I went 16.0 at 91, 4.8, K&N intake, GMPP (Borla) exhaust, Diablosport Predator, 3.23 gears, stock converter, on GM 20s in my 2007 RCSB below.

 

My 15.5 was 90 I believe

 

My 15.9 was at 88.7 but he is running a 6.0 to a 4.8 hp and torque a little different my truck wieghs 5000lbs with me in it

 

My ext cab 04 4.8 went 14.6. STock trans, 3.42s,open diff, K&N, longtubes, no cats,cutout, Wheatley tune. Took out back seat, tailgate, sparetire, this was on 26" street tires. Full street weight on some heavy *** 20s it went 15.1.I went 14.7 on 29" street tires on stock aluminum wheels. I put in some 3.73s and that really helped the truck, then went to 4.56s and that really helped, but no track times after the gear swap. I always said my 4.8 was a freak, it really responded to the little mods I did.

 

03darkhorse what was your 60ft. time? every tenth you take off 60ft. equals 2 tenths in the quarter mile.

 

13.7@98mph. 2.08 60ft.