gozfast,
I respect your input and questions let me clarify a little for you and other readers:
When I was referring to bump steer I was not referring to the technical term bump steer. however, I was referring to wheel tracking hence why i put tire wandering because when your tire gets larger any bumps whether it is sealer strip or uneven payment can and often almost snatch the wheel out of your hands. That was my fault for not using the proper term. Larger tires are more prone to this but like I said all of this can be mitigated.
As far as understeer is concerned I do smaller more technical tracks which have a lot of switchbacks, flat turns and mainly off cambered turns. The larger tires up front resembling a squared setup do not give me the feel "I" want in a turn. A successful turn for me I find that I am four wheel drifting toward the turn exit under power. When I had more of a squared setup the front and rear would push then the front would just let go when I was under power and on acceleration out. I had to add camber and toe out "slightly" in the front to counteract that affect.
slower transitions is just the nature of going bigger its a lot to move around not so much the weight aspect... look at it this way take your stock tires and the fronts are very narrow now roll circles with the fronts its easy and the circles are relatively small. Now take your rears and try to do the same... put aside the weight for a moment and you will notice the tire must gain more of an angle and edge to due the same size circle and you have to work harder to transition that turn. Adding camber helps with the transition problem.
Acceleration is hampered only by small amounts its just extra friction that you have to overcome but you do gain a larger contact patch for braking so where you had to take longer to accelerate you can stay on the gas longer and wait later to brake. There is always pros and cons of going bigger.
I ran a 255 because that was what was available in my Falken sponsorship and what fit within the fenders on my car.
As far as my new setup I have full control over my camber, toe and caster thanks to my spc suspension parts. This allows me to run those crazy sizes and mitigate those affects. Now again, this car is not all track and is a daily driver and a show car so I have to give up in some areas to accommodate other areas. I am going wider to accommodate the extra power thats all. I am keeping the staggered setup though.
Again, my preferences are tailored to my driving style... I came from Motorcycle racing and a lot of my bad driving habits stem from that experience. I scared the CHIT out of several instructors going into turns but once we got halfway through the turn they were like I cant believe this line works and as I powered out the turn they were surprised at the corner exit speed I carried. Now several years later I have left alot of my bad habits (and by bad habits I am referring to bike habits) to my bikes and I have adopted true car racing lines which have made me more consistent and faster. I still brake really late though haha I feel if my bike can do it so can the car
lol
Again, I respect your criticism and concern. I am not the be all end all when it comes to this stuff and we are always learning and being corrected by others so thank you for giving me the chance to further explain.
-Mike