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C7 DSC shock tuning help

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Old 05-15-2024, 03:17 PM
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Oh4GTO
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Default C7 DSC shock tuning help

Hey guys. Need some hold with tuning the front shocks of my C7. I have a wing and splitter from 9Lives and make a good bit of downforce. No real issues with the stock Z07 suspension but there is one issue I am having that I hope can be remedied. Under hard braking at speeds above 140mph my front splitter and pucks make contact with the ground. When static the bottom of the splitter is 4.5" off the ground. I am wondering if it's possible to stiffen the front shocks even more during deceleration.
Old 05-15-2024, 03:29 PM
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davidfarmer
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I don't know, but you are asking the shocks to do what you need springs to do.
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Old 05-15-2024, 04:03 PM
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Sounds like you are ready for coilovers.
Old 05-15-2024, 04:56 PM
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Oh4GTO
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Originally Posted by davidfarmer
I don't know, but you are asking the shocks to do what you need springs to do.
Yes and no. When i simply switched to the DSC controller, there was a major improvement in the reduction of nose dive under braking. This is their standard setup so i wanted to see if it was possible to stiffen the shocks even more. I just barely hit and would prefer to do it this way if possible.
Old 05-15-2024, 05:01 PM
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Originally Posted by Oh4GTO
Yes and no. When i simply switched to the DSC controller, there was a major improvement in the reduction of nose dive under braking. This is their standard setup so i wanted to see if it was possible to stiffen the shocks even more. I just barely hit and would prefer to do it this way if possible.
You can adjust the compression and rebound in the software.
Old 05-15-2024, 08:49 PM
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Yes but I don't understand what the values mean and how much I need to. Plus I need that to happen during braking in particular. I have never used the software other than to zero out the sensors.
Old 05-15-2024, 09:45 PM
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I hadn't watched this video in probably a year or more, but I seem to recall it or another video going over the parameters.
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Old 05-15-2024, 09:47 PM
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Originally Posted by Oh4GTO
Yes but I don't understand what the values mean and how much I need to. Plus I need that to happen during braking in particular. I have never used the software other than to zero out the sensors.
You should be able to go into the GForce tab and increase the G Comfort Parameters default rate from 1 to something like 10. That will stiffen the entire table by 10%. Then you'll need to go into each cell and proportionally change them so that you keep the rears and neutral values the same. So, using my 10% example you'd multiply those values by .90 and input them.

Obviously there's no easy button and it's trial and error so be sure you keep a copy of your baseline file so you can always return to where you started from.

Make sure you're editing Track mode (pick via the "Settings" tab) and make sure after making changes on the GForce tab you hit "Update"







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Old 05-17-2024, 10:08 AM
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Originally Posted by 96GS#007
You should be able to go into the GForce tab and increase the G Comfort Parameters default rate from 1 to something like 10. That will stiffen the entire table by 10%. Then you'll need to go into each cell and proportionally change them so that you keep the rears and neutral values the same. So, using my 10% example you'd multiply those values by .90 and input them.

Obviously there's no easy button and it's trial and error so be sure you keep a copy of your baseline file so you can always return to where you started from.

Make sure you're editing Track mode (pick via the "Settings" tab) and make sure after making changes on the GForce tab you hit "Update"


Thank you.
Old 05-17-2024, 10:14 AM
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You could stiffen the rebound in the rear to slow down the weight transfer under braking.
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Old 05-17-2024, 03:11 PM
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Reach out to DSC as well. The wrote me a custom table to help with ice mode issues I was having. They were very responsive
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Old 05-18-2024, 09:41 AM
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If you just want to stiffen the front under heavy braking, I would look at the brake table in the software, not that it works off brake pressure so you’ll need to get an idea of how hard you’re braking.

If it’s just braking from high speed, you could also try stiffening the front in the speed table. Assuming you only adjust for speeds higher than you would be cornering, it shouldn’t affect handling.

This video might help as well.
Old 05-18-2024, 09:55 AM
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Originally Posted by Poor-sha
If you just want to stiffen the front under heavy braking, I would look at the brake table in the software, not that it works off brake pressure so you’ll need to get an idea of how hard you’re braking.

If it’s just braking from high speed, you could also try stiffening the front in the speed table. Assuming you only adjust for speeds higher than you would be cornering, it shouldn’t affect handling.

This video might help as well.
https://youtu.be/G1wNgh5c54U?si=rc-HULRW8ZgNgMou
Great video as always!

Welcome back @Poor-sha ! Haven't seen you posting in awhile (or I'm just blind). Hope all is well!

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Old 05-18-2024, 09:59 AM
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Originally Posted by 96GS#007
Great video as always!

Welcome back @Poor-sha ! Haven't seen you posting in awhile (or I'm just blind). Hope all is well!
Thanks! Just been really busy and haven't had much time for track stuff.
Old 05-18-2024, 10:52 AM
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Originally Posted by UrbanKnight
Reach out to DSC as well. The wrote me a custom table to help with ice mode issues I was having. They were very responsive
Interesting. What changes did they make? A couple years back at The Firm I tried to match your braking point on the back straight and ended up in the grass, lol.
Old 05-18-2024, 11:31 AM
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Originally Posted by fatsport
Interesting. What changes did they make? A couple years back at The Firm I tried to match your braking point on the back straight and ended up in the grass, lol.


That has never happened to me

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Old 05-18-2024, 07:19 PM
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Originally Posted by Poor-sha
If you just want to stiffen the front under heavy braking, I would look at the brake table in the software, not that it works off brake pressure so you’ll need to get an idea of how hard you’re braking.

If it’s just braking from high speed, you could also try stiffening the front in the speed table. Assuming you only adjust for speeds higher than you would be cornering, it shouldn’t affect handling.

This video might help as well.
https://youtu.be/G1wNgh5c54U?si=rc-HULRW8ZgNgMou
I was hoping you would chime in. Thank you for the help. Ill be back at WGI in July so hoping to come back with some info for others. The shock can only get so stiff and I'm wondering if it's at the limit already. Hopefully I can ramp up how fast it gets to 100% stiffness.
Old 05-28-2024, 05:21 PM
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It might also be worth considering a 1/4" ride height bump. Since you don't want to mess up aero w/ a rake change I'd do 1/4" front and rear.

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