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sifl · 09-11-2019, 07:27 PM

CoolHandMoss, your post from yesterday (#3707) really resonated with me.

I do have a different setup than you, but the mid-corner push, and the inability to trail brake, were the symptoms of my issue. I also went through the process of trying different driving styles and lines to make it work. However, I did end up correcting most of the issue in car setup.

For reference, here is an abbreviation of the setup I ended with at Nationals.

Racecomp Engineering Tarmac 3 Clubsport on 9k springs. Stock front sway bar on shortened Hotchkis endlink. Mann Engineering rear sway bar on medium with RacerX endlinks. I do have an LSD. I have no rake, -3.9 front camber and -2.9 rear camber. My tire temps are about 3 degrees F different from outside to inside (inside is hotter) on concrete with BFGs or Yokohamas, with the fronts being about 5 degrees warmer. I am using stock brakes, but with HP+ pads. I only use the button-press method to turn off traction control and stability control.

Prior setups this year included stiff front bar with soft rear bar, stiff rear bar with soft front bar (very, very tail happy with this). I had all kinds of settings for the dampers. I knew to soften the front, and stiffen the rear, but I didn't hit on the right settings for quite a while

In my testing, I ran at lots of types of events this year, and had many co-drivers to help with input. It wasn't until the final few events that I got close to a balanced setup, and the final test-n-tunes at Nationals by my co-drivers (STXL and STX) put it together.

As you can imagine with 9k springs, I'm running rather soft bars and settings for my dampers. Still, with the final issue of mid-corner push and lack of trail braking, we had to soften front low speed compression, and soften the rear rebound and high speed compression. My final settings were (all from soft): front 7 rebound, 3 high speed compression, and 2 low speed compression; rear 7 rebound, 4 high speed compression, and 5 low speed compression. For context, full hard would be 20, 14, 6. Yes, I run out of travel in the front. I will be replacing my front 9k springs with 7k, because I believe that will help the car get more mechanical grip.

In the end, the car handled great for initial turn-in, mid-corner felt good, and we could trail brake again. For context, me and my co-drivers were 87 STX (ProSolo Finale and Nationals), 187 STX (ProSolo Finale and Nationals), and 87 STXL (Nationals).

Your setup is different, but hopefully this will help you think through your specific scenario.

09-11-2019, 07:27 PM	#3712
sifl Member Join Date: Feb 2015 Drives: 2013 Subaru BRZ Premium MT Location: Milwaukee Posts: 35 Thanks: 0 Thanked 26 Times in 18 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	CoolHandMoss, your post from yesterday (#3707) really resonated with me. I do have a different setup than you, but the mid-corner push, and the inability to trail brake, were the symptoms of my issue. I also went through the process of trying different driving styles and lines to make it work. However, I did end up correcting most of the issue in car setup. For reference, here is an abbreviation of the setup I ended with at Nationals. Racecomp Engineering Tarmac 3 Clubsport on 9k springs. Stock front sway bar on shortened Hotchkis endlink. Mann Engineering rear sway bar on medium with RacerX endlinks. I do have an LSD. I have no rake, -3.9 front camber and -2.9 rear camber. My tire temps are about 3 degrees F different from outside to inside (inside is hotter) on concrete with BFGs or Yokohamas, with the fronts being about 5 degrees warmer. I am using stock brakes, but with HP+ pads. I only use the button-press method to turn off traction control and stability control. Prior setups this year included stiff front bar with soft rear bar, stiff rear bar with soft front bar (very, very tail happy with this). I had all kinds of settings for the dampers. I knew to soften the front, and stiffen the rear, but I didn't hit on the right settings for quite a while In my testing, I ran at lots of types of events this year, and had many co-drivers to help with input. It wasn't until the final few events that I got close to a balanced setup, and the final test-n-tunes at Nationals by my co-drivers (STXL and STX) put it together. As you can imagine with 9k springs, I'm running rather soft bars and settings for my dampers. Still, with the final issue of mid-corner push and lack of trail braking, we had to soften front low speed compression, and soften the rear rebound and high speed compression. My final settings were (all from soft): front 7 rebound, 3 high speed compression, and 2 low speed compression; rear 7 rebound, 4 high speed compression, and 5 low speed compression. For context, full hard would be 20, 14, 6. Yes, I run out of travel in the front. I will be replacing my front 9k springs with 7k, because I believe that will help the car get more mechanical grip. In the end, the car handled great for initial turn-in, mid-corner felt good, and we could trail brake again. For context, me and my co-drivers were 87 STX (ProSolo Finale and Nationals), 187 STX (ProSolo Finale and Nationals), and 87 STXL (Nationals). Your setup is different, but hopefully this will help you think through your specific scenario.