GMCSIERRA5.3

what can i run stock..its a 4 door gmc sierra nnbs 5.3...on stock 20s..and what can i run with headers..full exhaust...cervo..shiftkit...tbstall for now...and tune..thanks guys

skipperdaddy

iTrader: (7)

What year truck? Its a big difference in times between the 4l60e 4spd and the 6l80e 6spd...also what rear gears?

GMCSIERRA5.3

its a 2007 i think its the 4 speed...and as far as gears idk lol

iamkeniff

iTrader: (16)

if you have 3:42s
16.4 stock
16.0 with LTs/OR-y
15.6 with a good tune, LTs/OR-y
14.4-14.8 with 3200 converter/vette servos/tune/LTs/OR-y
13.5-14.0s cam/stall/servos/tune/LTs/OR-y depending cam/weight/tires/traction of course

bigger motor 13.5s and lower with all above depending how you want to run it. gear swap will help too

WHITE5.3L

I went 14.6 with intake,servo, exhaust, and a great tune. You should be able to hit at least that. with full bolt ons

$ierraLY5

Yeah, "good tune".

GMCSIERRA5.3

i plan on tuning it with wheatley so i think it will be a good tune...

GMCSIERRA5.3

oh and what gears should i get 3:73 ???? 4 10s ???

$ierraLY5

I've been told that with out crewcab trucks with the long one piece drive shaft, 3.73 is the most we can go safely. If we want to go more than that we need to upgrade the drive shaft. I've been wondering if I can run a 3.90 if I just have my driveshaft balanced.

fredkj3

iTrader: (1)

yeah but your an extended cab, the OP is a CC which will affect his time. I would say 15.0 would be a good guess with those mods