(VIDEO) Suspension HELP for 70 dart swinger drag racing!

Wish I would have seen this earlier. I run a 71 Dart with almost an identical set up. Almost never figured out the set up.

I have a 408 with a powerglide and 4.86 gears. Leave at 3400 on a trans brake. Also have Cal Tracs with Calvert front and rear shocks.

You didnt need double adjustable shocks, but they won't hurt for sure.

My car was doing the same thing. Bouncing the tires back off the track and unloading. Calvert kept saying to loosen up the rear shocks. Made it worse. Finally got video of the car, and figured it out myself.

What to do:

Caltracs in the top hole

Zero pre load on the springs. You need to slide a nickel between the spring and the preload tube, then lock it down. do this on both sides. You have to let the suspension have that little bit of room to work and get body seperation from the rear tire. this pushes the tire into the track. If you have preload on the spring it will not allow the shackles to move forward and lift the body at the hit. It just stays in the neutral position since its not loaded while on the transbrake. On a footbrake car, you can preload the spring, because when you stage, you will have the suspension loaded and the shackle will be forward quite a bit already.

I moved my Calvert rear shocks to the 7th click out of 12, and it worked best there. The shock just needs to have the extension slowed down, so that it gradually pushes the tires into the track instead of squashing them and bouncing them back up.

I run a 29.5-9-15 slick and run 17-18 lbs in them.

My car runs 6.70's and 60ft's 1.44-1.45 on Alcohol.

Even in the heat, it hooks consistent. I made 13 runs last saturday and the 60ft only varied .003 over those runs.