Tran

Hi everyone, I've got a slightly different spring rate question with some different priorities to most here so would appreciate some input.

Car in question is my turbo NA. #2500 full interior, 280whp turbo car with 700/400 supermiata big grip kit (ie 1 1/8 thick wall RB front sway + 14mm SPM rear) with OSG.

• Dry setup is 15x9, 245 AR1s.
• Wet setup is a diddy 15x7, currently with a boring 195 Bridgestone T005 (soft sidewall road tyre, little choice in UHP 15s here) but probably going to change to an AD08RS for stiffer sidewalls and more predictability at the expense of even less wet grip.
• I sprint on 15x8s with 205 AR1s for quick warm up, but can end up having to run these in the wet if the conditions change, so only 0.7-0.8G. Eg in the video below.

I want to go to 900/500 for the 245 AR1s, but am wary that it's going to compromise the wet grip. Not only that, the balance is quite pushy in low grip. Could this be the 54107 bar overwhelming a very grip limited tyre? Would this get even worse with 900/500? Since it's wet so often here (80% of trackdays Oct-March, 30% April to September), is that a compromise worth making? Any suggestions would be appreciated.