Went to the track about a month ago, With the Lakewood 90/10 fronts, Viking double adjustables in the rear and a solid axle out back, i went 1.39 60 ft. I had way to stiff springs in the rear at the time, had the shocks set to full soft compression and full stiff rebound. I bought new springs for the rear. Went from a 225# spring to a 150# spring. Hopefully this will give me room to use my rears like they are supposed to be. We will see next time i make it to the track .