Hi Brian,
I just recently took my car to the track for the first time since I lowered it 4 years ago and put in a supercharger last fall.
Eventhough I have Eagle F1 tires all around on my stock 17" wheels, I could not hook up at all. I have H&R Supersports with urethane isolators but the front of my car (high point of fender well edge) sits at 25-3/4" and the rear (high point of fender well edge) sits at 26-3/4". So, with the SuperSports I really don't feel I'm having decent weight transfer. Great for other things but not a 1/4 miler.
Plus, since I moved to Colorado from Las Vegas, NV, the streets here are very "dippy" and "bumpy". I've bottomed more times than I can count anymore. I had to raise the intercooler for my Kenne Bell cause it was sitting too low after my "install instructions".
I think it's time to raise the car just a bit and get a spring that will transfer the weight a bit better when I'm drag racing at the track but will feel good doing the "twisties" through the mountain passes.
I have Bilstein struts/shocks, Kenny Brown SS, Matrix brace and jacking rails.
I'm also looking at getting street/track adjustable lower control arms. Maybe uppers but don't really know the purpose.
Also, going to get a set of 17" FR500 wheels, 9" fronts and 10.5" rears for some Drag Radials.
It's going to be a spring/summer/fall project but I really want to run better.
Anything else you can recommend for my "street pony that likes to run at the track", that would be cool.
BTW, here are your springs I am going to buy. I researched and these look sweet.
Click here to see the springs I plan on buying... Vogtland Springs
I'm not affiliated with any Mustang part provider. I am just going to try these out and I'll let you know. I know my H&R SS, and stock only at this point.