Ah10- I think you might be right with your tire selection on your set up. I went out today with Sorex 32's f/r and the car pushed (just a little). If I use a harder foam on the front and a softer foam in the rear (like double purple/purple) the car would probably worse. Since I already have purples and double purples I will try it. If it does what I think it will do, push even more, I'll switch the tires. Then I'll get your set up. Tires that is.