I plan on adding a extention to the rear of my slapper bars on my high 8 second 73 Fire bird. It hits too hard and lifts too much in the rear. I was thinking of extending the bars back a foot and running a plate on top of the springs with thread rods to connect it to the bars. I would use nuts on not sides of the plate ad tabs on the bar and adjust how far the plate sat over the spring. My goal is that when the front of the bar hits the spring and the car starts to lift hard in the back,the rear plate will hit the spring and start pulling down on the back of the spring to initiate weight transfer and stop the car from lifting in the rear. I would leave enough space over the plate that the front of the bar could hit and happy force to the tires and then the rear plate would hit and initiate more weight transfer. Right now I am limited on how hard I can leave,not b traction,but by how hard the car leapfrogs in the rear. I want to go blazingly fast on 11.5" wide DOT tires in a 3400# car with old school slapper bars.
Here is what my car does now. It is limited to high 1.30's in the 60 foot,but mostly mid 1.40's.
