Just trying to see what you guys are getting stock and modified with a 4.8.
do you think a cam,header,tune and 3800 stall would net a 13.x time slip?

 

add gear to that and you should hit a high 13 with good air

 

go to the fastest truck list and you can see where everyone with a 4.8 is at.
and with your 99 model no on the mods you listed, your hp is only 250 at the crank so about 190 maybe 200 at the wheels.

 

a buddy with a 02 4.8 342 gear K&N filter and flowmaster on stock tires went a best of 15.6 @ 88 mph

 

Right now the only mods to speak of are, K&N FIPK ,ported tb, 3in 3 chamber flowmaster...(really a power robber)
what would be a guess for an 1/8 mile time?

anyone know what rpm's are at cruising on the freeway with 4.10's and a big stall converter? It seems alot of you have gone that route.

 

I know! I know!!!

06' W/4.10's, magnaflow, CAI, tune.
Remember the 06' vs 99' has electric fans and I have no idea what else different.
At Atmore, AL today mine went 10.31@70.5mph with a 2.39 60ft. I've got a 2,200 stall that I think will wake it up nicely.

 

i see with a 30" tire and 410s im at 2200 rpms at 70mph

 

not that bad really. i think stock gears are like 1700 rpms at 70

 

I've got a friend hitting 12.9's on his rcsb 4.8 with a 150 shot, 13.2's with his stereo system on (ported bed with 4 12" subs). His mods, after market muffler, K&N FIPK and Hypertech and of course 150 shot and I believe it's a 2001. There's another 4.8, a N/A that hit 13.5's on cool weather with cam and all the boltons, but I don't think it'll happen with just those mods you listed.