Mad Dog 24

This is what the most recent info the dealer gets from GM on the MRC retune. It should answer all questions on what, why and cost. I did notice there is mention at the bottom that for optimum use the car should sit for many hours. Odd as I read the opposite in another article that is was not necessary. Hard to believe a shock recalibration can make my Z07 handle any better on the track. I will take a softer ride on the street.

Upgrade
UPDATED
Updated Date:Jan 31, 2018 18:00 ET
Chevrolet, Buick, GMC and Cadillac U.S. Dealers:
Chevrolet Performance announced the launch of "Corvette Magnetic Ride Suspension Calibration
Upgrade" to the Chevrolet Performance Parts program in October 2017. This message has
been updated to include additional product information, ealer installation details, newly added
calibration references, and attributes.
Availability: See chart below for availability.
Warranty Information: Reflashing the MR (Magnetic Ride) Suspension Control Module with this
calibration maintains the vehicle's warranty.
"For nearly half a century, Chevrolet Performance has been the resource for enthusiasts. Chevy
has a decades-long winning track record that today extends to virtually every form of
motorsports. And while that legacy looks great in a trophy case, it also influences the vehicles
we design, the engines we build and the performance parts you install."
Product Information:
Our Corvette development engineers now have new tools which help them better analyze MRC
(Magnetic Ride Calibration) data recorded on the bench, on the road, and on the track. These tools
have resulted in major improvements in Tour, Sport, and Track modes for all MRC vehicles. The
improvements are so significant that all 2019 MRC Corvettes will include the new calibration.
Chevrolet Performance is now making these new calibrations available to all customers already in
possession of a 2014-2018 7 Generation Corvette with MRC (see Calibration Reference Table).
The Corvette MRC Suspension Calibration Upgrades greatly improve ride quality and handling feel,
and have been rigorously validated and tested to ensure all chassis systems work together
seamlessly.
Each Tour, Sport, and Track calibration is independently tuned for its respective chassis. The new
calibrations exhibit a much more refined balance of the heave, pitch, roll, wheel, handling, and
temperature compensation algorithms.
In Tour and Sport Modes the driver will feel major improvements in impact isolation and integration.
Ride motion and balance are also greatly enhanced. Parking lot and low-speed (25 mph and less)
ride motions are more compliant and less jarring. Sport mode also improves the handling precision
and balance. Like Tour mode, Sport mode will exhibit the same impact and body motion
improvements over the original Sport mode.
th
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In Track Mode, the balance and response to driver inputs are more linear, and vehicle dynamics,
based on throttle response, have been greatly improved. The customer should notice more linear
behavior near and at the limit of adhesion.
Additionally, for 2015 and 2016 Z06 customers who have the Z07 package, there is an option to
update the Tour and Sport calibrations and keep the Track calibration. This is intended for a
customer who may prefer to keep the on-track calibration as is while benefiting from the tour and
sport updates.
See below for a more complete detailed explanation of the improvements in each mode.
Dealer Installation Details:
To reprogram the “Corvette Magnetic Ride Suspension Calibration" please call Techline Customer
Support Center (TCSC) at 1-800-828-6860 for programming requirements and instructions. Please
be ready to provide the 17-digit VIN prior to calling. Please see detailed steps below:
Step 1 – Obtain VIN of vehicle for reprogramming.
Step 2 – Call TCSC at 1-800-828-6860.
Step 3 – Flash Calibration and complete Setup Process using the Service Programming System.
Model Year 2014-2016 vehicles refer to Document ID 3633837, Model Year 2017-2018 vehicles refer
to Document ID 4593366.
Step 4 – Refer to installation instructions in SI Document ID 4873206, for specific product details.
Step 5 – The labor for download and the re-flash of the module is to be charged to labor OP code
0602448 at an allowable 0.3hr.
Step 6 – Collect MSRP $350.00 from customer which covers ALL COST, including Labor for the
download and re-flash of the module. NOTE: This upgraded suspension calibration is a
customer-pay transaction and should not be submitted as a warranty claim. The only
submission to General Motors is for 0.3hr Labor per Step 5.
Step 7 – Dealer Piece Cost for Calibration will be billed to the BARS/Open Account monthly via
Techline. Dealer Statement will include the 17-digit VIN, Part Number Reference “CORVSUSP" and
Dealer Piece Cost.
Step 8 – To get the maximum performance and consistency out of the updated calibration, please
allow the vehicle to sit for 8 to 10 hours after the update and prior to spirited driving.
NOTE:
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The MRC damper system has a built-in temperature offset correction as part of the calibration.
Chevrolet Performance recommends allowing the vehicle to sit for 8 to 10 hours after flash of
Calibration and prior to spirited driving. This step does not need to be done at the dealership and
can be done at the customer's convenience. Allowing the vehicle to sit will allow the damper
temperatures to normalize, and the temperature offset in the calibration to accurately reset. The
vehicle is still functional prior to sitting for 8-10 hours. However, the temperature offset correction
will be less accurate, resulting in a less optimized operation until the damper temperatures
normalize.
CALIBRATION REFERENCE TABLE
Model Year Trim Level Suspension
RPO
Availability
2015 Z06 with Z07 Customer to specify if they wish to
include Track Mode Change or No Track Mode
Change with new Calibration for this Trim
FE7 NOW
2016 Z06 with Z07 Customer to specify if they wish to
include Track Mode Change or No Track Mode
Change with new Calibration for this Trim
FE7 NOW
2017 Z06 with Z07 FE7 End of Q1 2018
2018 Z06 with Z07 FE7 End of Q1 2018
2015 Z06 without Z07 FE6 NOW
2016 Z06 without Z07 FE6 NOW
2017 Z06 without Z07 FE6 NOW
2018 Z06 without Z07 FE6 End of Q1 2018
2017 Grand Sport with Z07 FE7 End of Q1 2018
2018 Grand Sport with Z07 FE7 End of Q1 2018
2017 Grand Sport without Z07 FE6 End of Q1 2018
2018 Grand Sport without Z07 FE6 End of Q1 2018
2014 Z51 (Tour and Sport Mode Only FE4) FE4 NOW
2015 Z51 (Tour and Sport Mode Only) FE4 NOW
2016 Z51 (Tour and Sport Mode Only) FE4 NOW
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2017 Z51 (Tour and Sport Mode Only) FE4 End of Q1 2018
2018 Z51 (Tour and Sport Mode Only) FE4 End of Q1 2018
2016 Base FE2 NOW
2017 Base FE2 NOW
2018 Base FE2 End of Q1 2018
Attributes for the New MR Calibration Updates - Tour Mode:
Applies to
2016 to 2018 Base+F55
2014 to 2017 Z51
2017 Grand Sport
2017 Grand Sport w/Z07
2015 to 2017 Z06
2015 to 2017 Z06w/Z07
For 2018 MRC vehicles, please see footnote:
• Major Improvements in impact isolation and integration – Impacts are softer, and less harsh.
When the vehicle does encounter rough roads, the structural feel is greatly improved.
• Major improvements in ride motions at all speeds. Much more balanced and less abrupt. The
car is more poised in compression and rebound, resulting in a flatter ride. This is not implying
stiffer body motions, but the vehicle exhibits a more composed ride.
• Parking lot and low speed (25mph and less) ride motions are more compliant and less jarring.
• Handling is more responsive and much more precise. The response of the vehicle is more
exact responding to the driver steering inputs.
• For 2018 vehicles, some of the final improvements being implemented for the MRC upgrades
were part of the 2018 production release. Thus, the improvements for 2018 vehicles are also
very significant but not quite as dramatic as the 2014 to 2017 packages.
Attributes for the New MR Calibration Updates - Sport Mode:
Applies to
2016 to 2018 Base+F55
2014 to 2017 Z51
2017 Grand Sport
2017 Grand Sport w/Z07
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2015 to 2017 Z06
2015 to 2017 Z06w/Z07
For 2018 MRC vehicles, please see footnote:
• Sport also has major improvements in impact isolation and integration. With these new
improvements, the impact isolation and integration is better than the Tour mode with the
original production calibrations. – Impacts are softer, and less harsh. When the vehicle does
encounter rough roads, the structural feel is greatly improved.
• Major improvements in ride motions at all speeds. Much more balanced and less abrupt. The
car is more poised in compression and rebound, resulting in a flatter ride. The Sport mode
exhibits significantly more body motion control that Tour.
• Handling is more responsive and much more precise. The response of the vehicle is more
exact responding to the driver steering inputs weather using Sport mode as a daily driver, or
carving through a mountain road.
• Parking lot and low speed (25mph and less) ride motions are more compliant and less jarring.
• For 2018 vehicles, some of the final improvements being implemented for the MRC upgrades
were part of the 2018 production release. Thus, the improvements for 2018 vehicles are also
very significant but not quite as dramatic as the 2014 to 2017 packages.
Attributes for the New MR Calibration Updates - Track Mode:
Applies to
2017 & 2018 Grand Sport
2015 to 2018 Z06
2015 to 2016 Z06 w/Z07
For 2017 and 2018 Grand Sport wZ07, & Z06 with Z07, please see footnote:
• The new track mode is better balanced and response to driver inputs are much more linear
near and at the limit of adhesion. With the new Track calibration, the redistribution of the
damping makes the car more fluid as it is cornered. The rotation of the car is more precise at
initial turn in, and maintains its path through the turn. As the driver applies throttle, the car
sustains its heading much better.
• The new Track calibrations increases driver confidence. This, coupled with the vehicle being
better balanced during the cornering maneuvers resulted in an average of a 1 second lap time
improvement over the original calibration.
• Revised temperature compensation tables. As the fluid heated up, during long continuous and
repeated runs, sometimes over 100 degrees Celsius (212 degrees Fahrenheit), the damping
was effected, not only on an absolute basis, but also the front to rear effecting the balance of
the car. New temperature compensation tables were developed to make the balance of the
car much more exact regardless of the damper fluid temperature.
• For 2017 and 2018 Grand Sport wZ07, & Z06 with Z07. The new Chevrolet Performance
Track foundation calibrations were in the 2017 and 2018 Grand Sport wZ07, & Z06 with Z07
production vehicles with the exception of the revised temperature compensation tables
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discussed above. The new Chevrolet Performance calibrations for 2017 and 2018 Grand Sport
wZ07, & Z06 with Z07 now include the updated temperature compensation.
01-31-18 Copy of this message GCUS-9-4986 V2.0 - Chev Perf Corvette Magnetic Ride
Suspension Calibration Upgrade UPDATED.pdf
About this Article
Reference Number: GCUS-9-4986
Published to: Service; Parts
Version: 1.0
Keywords: Corvette, Calibration, Magnetic Ride, Suspension, Z06, Z51, Z07, Grand Sport, Track Mode, Sport Mode, Tour Mode
Original Published Date:Oct 30, 2017 15:30 ET
Expires:Oct 31, 2018 00:00 ET
Contact: david.g.macwebb@gm.com
Headline Details Page 6 of 6
https:/

patrick4588

is this a free upgrade

Vyper340

Free labor but the program is $350

irun4cops

curious what the guys at DSC have to say about this new update, and how close it mirrors what they worked to achieve.

My guess is chevy noticed DSC's great work and did a bit of copying.

Bill Dearborn

See Step 6 in the procedure posted above. $350.00 total.

Bill

irun4cops

is this the same update that existed before or is it leaps and bounds ahead of the previous update?

I'm sure thats hard to answer if it just came out 2 days ago. Let us know once you track stars have a chance to test it.

HorsePowerObsessed

Interesting that the 2015 and 2016 Z07 packages are available now but the 2017 and 2018 aren't. Was there a difference in suspension in those years?

patrick4588

good catch. I have a 2017 with z07 and was going to go tomorrow about getting it done

MSG C5

HorsePowerObsessed

God, I hate dealerships...

mdz06vetter

reached out to Mike and asked him to respond - will see what he has to say, as I was one of the early adopters of DSC controller and love it

irun4cops

after further investigation, i have found that this looks to be the same update that already existed for the 350 bucks as of last month. The only update may be more "information about" the product.

Bill Dearborn

That is because they can't read. The Service Writers have to have things pointed out to them. Carrying the document with you will help because ti will tell them where to go for information. Without it they think this is a different kind of update that you are requesting and following normal procedures. What GM is doing with this is outside of their normal operation and not what they do several hundred times a week.

The dealership I use has an excellent service department but they didn't know how to handle this until I walked them through it and they talked to the GM support center to finally understand and then called me back to verify what they learned was what I wanted done.

Bill

Bill Dearborn

Basically, it is a clarification of the process which was clear as mud before this. Nothing has changed other than the steps to follow have been clearly stated.

Bill

BELVIN20

Had my Z updated last Friday, everything went well until I had to pay the bill, the dealer tried to charge me labor for the install, thank goodness I had the documentation with the labor operation code, labor charge was removed, & I drove off happy. Best to carry the documentation with you to dealerships to let them know you know how the program is billed.

MSG C5

The dealership my friend worked with told him the extra cost is because the upgrade takes 24 hours. First time I’ve heard it takes that long.

Gonzo

They may be talking about the temperature offset correction. Which takes 8 to 10 hours not 24.......... and the car does not have to stay at the deal ship.

Z06Shark

watching ...

feeder82

MSRP $350, dealers could certainly mark the price up, as they have over the years on vehicles and everything else marked manufacturers suggested retail price

Mad Dog 24

Yup....3 Years ago i had to bring a CF post with me to the dealer each time to make sure they would use only Mobil 1 on my free oil changes too!

I didn't think this most recent GM note was much different than the past ones but thought it would answer so many questions guys will have. In the case i don't like it at the track this coming season i will make sure it can be reversed. I'm afraid my car is so in tune with me as i am with it that a major shock difference could shock "my" system