For those that only bleed blue, the OP is referring to a Lexus ISF with a 5.0L Japanese V8 that debuted in 2008. It's a great performance compact sedan for its time. Behind the wheels, it feels light years ahead of a stock Foxbody for sure. My wife likes it for the size and I love it for the motor and trans.
I also happen to have a '90 Fox convertible with a complete MM suspension, minus their adjustable rear sway bar. I feel confident driving both vehicles hard into the corner. The ISF provides more of a refined feeling and it tends to give you more false confidence to keep on pushing it harder. The Fox is more raw, from the steering to the suspension, you're getting feedback from the car in every angle.
Both are a blast to drive, but they provide 2 totally difference driving experience. My suggestion is to look into doing a complete MM suspension setup. Do that with some upgraded brakes and you'll wonder why you never did it sooner.
Many moons ago, Jack Hidley provided some solid advice on MM spring rates. I've been happy ever since!
Stangin, this is exactly the feedback I was hoping to hear. For those asking, sorry, I didn't respond back until now. Yes, the ISF is a Lexus IS model sedan but setup for the track right from the factory. 416hp V8, 8 speed auto, 14" brakes, IRS, 9" / 9.5" wheels. Its a great package in my opinion. Could be a little larger in the back seat for passengers, but not any less room than the stang. What year ISF do you have?
I had the stang out this past weekend, and on back roads coming out of turn, it gets a little squirrely in the rear. The 363 makes 435 rwtq at 4300 with 3.73 gears which makes for interesting driving if you keep your foot into it. Has me wondering if this can be cured with IRS or PHB/TA combo(?)
The ISF on the other hand has me spoiled since its my daily driver. Of course it makes no where near that power to tire, but pulls up top and feels great into 140+. In fact it really does such a great job, I have to look down to realized how fast I'm actually going. In the stang, you really have to be a better driver.
Stangin, it shows you have a coyote in your signature, so your car is def making some power. Do you have any issues with putting the power to ground with your setup? From 0-60 or spirited back road driving? From the 0-60 there's no way my stang could keep with the F ( without slicks or something ). The F sticks, and goes, and you don't have to think about it too much-- just focus on driving. Mustang takes a lot more skill to get it moving and then not blow the tires off. The dual friction mcleod clutch is also very grabby, which doesn't help when driving around town. I'm guessing the coyote doesn't make as much torque so maybe that's a bit easier(?)
You def nailed it about the stang just feeling a lot more raw, unrefined feel. And with the power to weight, it accelerates quickly ( when you have traction ).