When I said "loosen the rear end", I meant inducing a slide.
On soft springs, removal of the rear sway bar can (depending on driving style) result much more drastic loading of the outside rear tire and unloading of the inside rear, especially during turn in and sustained tail braking. Accelerating out of that position, especially on small street tires, can feel like the rear end is loose (from the roll) or even see the rear end slide out on you (not necessarily causing oversteer as it is simply testing get limits of your tires)
The converse can be true also though. If running stiff springs and big tires, dropping the bar will likely result in the rear lagging into the turn and promote understeer.
The opposite is true with a larger rear bar. Big bar with stiff springs and you may wheel skip your way into the dirt by not loading the outside rear wheel enough. This again depends on braking and acceleration relative to the turn geometry.
This is why I cautioned against "upgrading" the sway bar. It's a very tricky thing to dial in and bigger isn't always better. If you go through old posts, you'll find several mentions of reduced handling with larger bars (especially in the rear).
I will say though that this is the whole premise of adjustable bars. Just like with coilovers, you have the ability to fine tune depending on your setup (and even how the car wants to run that particular weekend on that specific track). When you get into track events and start dialing in suspension setups, that will be the real "upgrade".
If I had to guess - installing a bigger front bar on your setup will likely result in some understeer compared to where your are now. Since you have 235s up front, the result will likely be very similar to the OEM setup on front 205s.
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2000 Box Base, Renegade Stage 1 performance mods complete, more to come
When the owners manual says that the laws of physics can't be broken by this car, I took it as a challenge...
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