No, I only have a 5.3 that is 2wd. Maybe I'm expecting too much from it. I thought from the beginning that I should be able to hit 12.2 with all my mods in my Sig. Then I see 12.3 in yours, and that confirms to me that my thoughts shouldn't be too far off. Plus my heads are CNC'd and hand finished, and I am running water/meth too. I guess we will see what happens next time I go to the track. It does run a lot stronger on the street than it did before. I have 3.73's with a 4l80e, and if I roll into it in first it will haze the tires all the way through first. If I get into it too hard it will just break them loose.

 

Here is a quick video. It shifted into 2nd early as the tire speed was much faster than the vehicle speed.

 

My 12.3 pass was with 3.73 gears, 31.5 inch tires, stock manifolds, stock y-pipe, 2.25" kink-bent cat-back, and stock 76mm throttle body. My 5.3 has stock heads, and stock shortblock. Only mods are cam/springs/pushrods/rockers. No meth, boost only, and 90 octane Chevron in the tank.

My truck is ECSB, 4x4, considerably heavier than yours. I don't think you're expecting too much. What tire are you running?

I wish I could see a datalog and tune file of yours...

 

Now you really have me scratching my head. Maybe its because of that .10 smaller snout pulley.

I am running Goodyear Eagle LS2 275/55/20 tires. I think I just need to break down and get EFI Live for myself. Or take it to the dyno. Do you have any dyno #'s? What does your truck weigh? Were you leaving in 4wd?

 

My 12.3 at 104 was with a 3.0 pulley. Truck weighs around 5700 pounds. I dyno'd it a few months ago, with the "old setup" and it put down 425/428 IIRC. I never got a printout like I was promised..... Found my fuel filter clogged shortly after the dyno. I do launch in 4x4, and the truck does not shift out until I lift(which is after the finish line).

If I had a 2WD, I'd get slicks.

Hell, I'm trying to decide now if I should get 2 slicks for the rear, or 4 drag radials.

 

Now you really have me scratching my head even more. I assumed my truck would put down just over 500 to the ground. Something must be horribly wrong with my set up.

 

Road trip to Alaska!!

 

I didn't know that roads even led to Wasilla AK?

 

Google Maps

 

haha!

Pulley down bro, and get her to a reputable dyno where you can dial in your setup. Sounds like you have the Street tuning handled.

What is your afr?