Originally Posted by Tom95YJ
Once you drive a 4 cylinder that has been re-geared your thought process of running stock gears and 33's will drastically change !
I have. It drove alright. Not exceptionally, but acceptably (much like mine with stock gears). My "thought process" is still intact and unchanged.
My daily driver is a Charger R/T. It doesn't get a whole lot more "drastic" than going from 350 hp & 400 ft lbs of torque in a car that weighs less than my Jeep to the 4 angry squirrels.
Regardless, it doesn't change the fact that on 33s I can drive interstate without issue (and I'm not a "flat land" guy). For guys out West in areas like Nevada where the speed limit is 80+ and there are mountains, I can see where there'd be a problem, but at that point 4.88s aren't going to cut it either. To do that every day, you'd want a minimum of 6 cylinders and 8 would be far better...
It's comical that people talk about changing from 4.10s to 4.88s as though it'll feel like you added another 50 hp. With 4.10 gears and 33" tires, every rotation of the drive shaft will move you approximately 25.29". With 4.88s it is 21.24". Will it give better driveability? You betcha! Will it feel more powerful? Yep. Will it "drastically change", no. It will not. You won't have to work as hard to maintain speed, but it's still a naturally aspirated 2.5 liter engine. You can only do a certain amount of work per given unit of torque.
Rotating mass is a big deal here. If you have a limited ability to do work (i.e. the torque from a 2.5) the wasted "work" from spinning a heavier wheel/tire combo can zap you of driveability. If you bump up a few posts, you'll see where I was talking about wheel and tire selection. If you have a wheel and tire combo that weighs less, it will feel (acceleration and top speed) similar to a regeared Jeep running steel wheels and heavier tires. As a side benefit, it will stop better too.