Went 15.1 at 90mph. I think I could have dipped into the 14s with weight reduction. 04 silverado ecsb with 4.8L, Wheatley dual tune 89/93, Lt's and offroad y pipe, slp loudmouth exhaust, K&N intake, 3.42s with open diff. This was with 20s on the front and 16s on the back. Full street weight with tailgate, stereo system with subwoofers, etc.

 

Back when My truck had the same mods it went 16.0 @ 87mph without headers, and 15.7 @88 mph with. What was your 60ft? You sure you dont have a g80? Hell My truck with the same mods and a 75 shot went 15.3 @ 93mph. My 60ft was about 2.4-2.55. Thats very good for an open diff 3.42's tune intake and exhaust. Or were you doing 4wd starts?

 

i have that minus lts plus e fans in a rcsb and im runnin 15.5! wtf!
well then again i did have 20s out back and from what vff jeff said about headers i should be right with you. and i got a problem w/ my lifters so i should be about there

 

Open diff 3.42s, I can assure you. This truck has always run strong, even from the factory. I used to outrun alot of 5.3s stock or with just intake, exhaust and programmer.My 60ft was 2.??, dont remember. I will have to get out a time slip. It is slow off the line, but gets going good from there. I am planning on taking out/off alot of things next time I go to the track, it should run at least a 14.8 I figure. I have efans but never put them on. Oh, and this is a two wheel drive truck.

 

60fts are 2.37

 

mine is 2.40 but i spin off the line like a mother

 

With the kumho tires, I spun bad. With the sumitomo htrzs running low pressure, I spin just a little.

 

im lookin at truetrac n 3.90s to fix that but i think im just gonna add 2 wheel spin lol

 

I hear ya. I want to put in some 4.10s and a lsd, that should help alot.