I have a 2000 rcsb sierra with a 5.3 and I just had it dyno tuned today. It has basically full bolt ons. LPP LT headers, Airaid cold air intake, egr blocked off, ory pipe and magnaflow exhaust. I also did a gear swap from 3.42s to 4.10s. I had it dyno tuned today and it made 261 rwhp and 287rwtq, but I've read that the lower gears will show lower dyno numbers than taller gears. I'm just wondering what kind of quarter mile times do you think I will see?

 

14.78 @ 96mph

 

Did you type that into a calculator or something? Lol

 

I would guess a lower mph.

 

14.58@93ish if u had a stall be low 14s

 

Sweet. I was hoping it would be in the mid 14s.

 

nope just my brain haha

 

One other question. How do those numbers sound that the truck made on the dyno after the dyno tune, considering that my 4.10 gears decrease dyno numbers? I've read that the early year 5.3s like mine dyno around 205 rwhp stock so it seems to me like he was able to get quite a bit out of it.

 

stock is 230 or so... e-fans are +10 and cam +30

did you dyno in 3rd gear? dont get caught up in the numbers, take it to the track and find out!

 

I have the same mods as you and ran 14.3 @ 97mph on street tires (think my '60 was 2.3-ish).