I see lots of things happening that are working against you. The biggest is when you're brake stalling the **** out of it, you're using the antisquat up before the truck even moves. Antisquat helps to plant the rear (you see this by watching distance between the separation of the body and the tire). It the video, the back of the truck is raised up when you brake stall and the rear suspension has nothing to do when the truck takes off. How do you fix this......I'm not real sure as every car is different. Is there an adjustment that you can make to the bars that don't allow them to work until you let off the brake?

If you only have single adjustable shocks in the back, I'd probably tighten then up a bit. I't should slow the rear end down enough to help keep the tire planted.

Moving to the front. The front isn't moving. lol What is the exact set up you have on the front?

 

The front of the truck is extremely bouncy. Stock shocks with 1 coil cut from the stock springs and 2" drop spindles. I can put one hand on the hood and bounce it up and down.
As far as burnout goes, I've always heard these tires only like to be about 15° above track temp so the burn out is a quick 1-2 then let off, then before going to the light, just stab it once to make sure everything is good.

The reason for the brake stalling in the 1st vid was it seems when I just launch off idle it's almost like it hits the tires too hard and unloads them (can kind of be seen in video taped from the stands) I was seeing maybe if I brake stalled it, it would help the problem. I was very wrong.
The preload on the bars is pretty tight. The tab that puts pressure on the leaf is sitting on the leaf eyelet even when sitting still.

 

Dont start at 12 psi tire pressure as suggested above. Just check pressure between runs and adjust as necessary. On burn out i would run them to the top of 2nd gear quickly and feather out while letting the truck roll forward. See if that works for you. If you get a high pitch squeek at the end of the burnout youre in business.

You were getting close when you hit the tire too hard and unloading. Once youre at that point, start tightening the shocks to control the hit. My last truck went from 2.1 to 1.46 using only shock adjustments. Try to keep the brake stall somewhere between 12-1500 to avoid using up all of your antisquat before ever launching.

 

Ok cool, so it sounds like I was getting close then. When I go back Friday I will probably just do 60' hits until I get it dialed in. Guess I'll try 1200 ish and the shocks on maybe the 4th setting since they were on the 2nd on the last pass

 

Yeah don't set the tires at 12psi, that was just a dumb example saying that they raise pressure after heating them up. Nothing wrong with playing around with pressures and burnout procedure til you find what it likes.

 

12 psi is where id start with a slick, but drag radials dont behave like a slick.

 

Have made 2 passes with no luck at all having the bars facing down in the front with shocks on 2 then on 8. On 2 it was much worse. Minimal preload on them. Just moved them to the lowest position front and back with same amount of preload and going to try it.

 

Bar facing down up front is tbe softest hit. Try bottom hole on axle and top hole on the spring eye for the hardest hit and see how it acts imo. Zero preload with the bar just touching the spring pack with driver in truck. Shocks at softest setting to start just to see how it acts. Get video for us.tighten the shocks from there if it hits too hard. Give it some preload if it doesnt hit hard enough.

 

I'll give that a try this week when I go back!
Ended up not too terrible with them on bottom on both, 2 turns of preload, and shocks on 5th setting. Got a 1.70 out of being able to spray about 30' out.

 

Get video of both your burnout and launch for us. Did you check to make sure the spring and shackle isnt over torqued? Same should go for frt control arms.