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2006 f55 shocks

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Old Nov 14, 2011 | 10:00 PM
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Default 2006 f55 shocks

anyone know who makes 2006 f55 shocks, controlarm position sensor and shock controller for gm??????

i want to firm up the shocks just like ferrari, porsche, etc drivers do from the drivers seat when on the track and then soften right up for the ride home

Last edited by frankgtb; Nov 15, 2011 at 07:27 AM.
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Old Nov 15, 2011 | 01:57 AM
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Originally Posted by frankgtb
anyone know who makes 2006 f55 shocks, controlarm position sensor and shock controller for gm??????

iam contemplating controling firmness by the driver
It's not firmness that's being controlled. If you want firmness, get stiffer springs.
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Old Nov 15, 2011 | 07:02 AM
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fair enough stiffer spring does increase firmness but my base springs are great on the street and ok on the track cause they dont seem to be bottoming out.

Last edited by frankgtb; Nov 15, 2011 at 07:26 AM.
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Old Nov 15, 2011 | 12:44 PM
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I take it that the Touring and Sport setting for the magnetic shocks is not enough for you?

The control arm position sensor does not have anything to do with the "firmness" of te shock other than report the suspension position and its rate of change in position.

IMHO, if you want to make the shocks firmer you will need to get into the software that controls the shocks. Unfortunately, I have no idea how to do that.
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Old Nov 15, 2011 | 10:23 PM
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Originally Posted by FireRoc
I take it that the Touring and Sport setting for the magnetic shocks is not enough for you?

The control arm position sensor does not have anything to do with the "firmness" of te shock other than report the suspension position and its rate of change in position.

IMHO, if you want to make the shocks firmer you will need to get into the software that controls the shocks. Unfortunately, I have no idea how to do that.
although i and an electrical engineer observed different outputs from the f55 module when in touring and sport, we and hundreds of others feel no performance difference between the 2 whatsoever

therefore we are exploring the idea of bypassing the module and control arm position sensor and setting the shocks to firm or soft by a switch in the cockpit
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Old Nov 15, 2011 | 11:32 PM
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There is a huge difference in how the shocks react depending mode. Understand the shocks just don't get firmer, that is not the intent of the system. Sometime they get stiffer and at other times they get softer. Damping and rebound are all control by the algorithm programmed into the module. It uses the yaw sensor, steering wheel position sensor and the wheel sensor to figure this out.

An example of how this works would be as follows. In sport mode assume you are making a hard left hand turn. It will greatly increase damping on the the right side shocks and decreasing rebound to the left side shocks. This tends to let the car turn flatter through the corner. As you straighten out the wheel it decreases damping on the left side and increase rebound to the right. This returns the car to a neutral stance faster.

But there is only so much you can do based on spring rate. And that is the biggest limitation of your setup. I have ran my 2008 in autocross the last 3 years. Dive is really bad IMO but that is a function of the spring not the shock for the most part. I also upgraded to Z51 sways to reduce roll this year and that helps. But if I forget to switch from tour to sport there is a huge difference in how the car handles. It is very hard to feel a difference at all on the road but it can be felt if you understand how the system works.

It does not make the ride soft and hard. That is the biggest misconception out there.
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Old Nov 16, 2011 | 02:33 AM
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Originally Posted by TMyers
There is a huge difference in how the shocks react depending mode. Understand the shocks just don't get firmer, that is not the intent of the system. Sometime they get stiffer and at other times they get softer. Damping and rebound are all control by the algorithm programmed into the module. It uses the yaw sensor, steering wheel position sensor and the wheel sensor to figure this out.

An example of how this works would be as follows. In sport mode assume you are making a hard left hand turn. It will greatly increase damping on the the right side shocks and decreasing rebound to the left side shocks. This tends to let the car turn flatter through the corner. As you straighten out the wheel it decreases damping on the left side and increase rebound to the right. This returns the car to a neutral stance faster.

But there is only so much you can do based on spring rate. And that is the biggest limitation of your setup. I have ran my 2008 in autocross the last 3 years. Dive is really bad IMO but that is a function of the spring not the shock for the most part. I also upgraded to Z51 sways to reduce roll this year and that helps. But if I forget to switch from tour to sport there is a huge difference in how the car handles. It is very hard to feel a difference at all on the road but it can be felt if you understand how the system works.

It does not make the ride soft and hard. That is the biggest misconception out there.
A significant part of the difference between Tour and Sport is the speed that the shocks react to change. It becomes noticeable if you quickly swerve left and right and repeat, then flip the switch during the process. Do it in an empty parking lot, so you don't get busted.
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