This is how its been -- Our Street grade urethane is designed for street use and our Track grade urethane is designed for track use and hardcore enthusiasts.
This is what is going on -- MZR horsepower capabilities have advanced significantly over the past 24 months and our urethane must evolve to take the power. Bring on the power, our mounts can take it - time to beef up the poly.
This is what we are doing -- The goal for our urethane has always been to transfer the least amount of NVH (noise, vibration, harshness) into the cabin while recovering the most amount of engine output. In other words, put the most amount of power to the asphalt without upsetting the wife.
Our Street grade urethane transfers the least amount of NVH into the cabin while achieving the results of a solid engine mount. Street grade urethane has a preferred horsepower usage up to 275 WHP (wheel horsepower) and minimal aggressive driving. This is for factory-friendly enthusiasts that want the least amount of NVH in to the cabin but the performance of a solid engine mount. Aggressive driving and higher engine output will lower the lifespan of Street grade urethane.
Track grade urethane's primary goal is to transfer the most amount of engine output to the wheels and transfer the least amount of NVH to the cabin. Depending on the vehicle's power output and driving characteristics, this urethane will last indefinitely.
Fatigued Street Grade R3 urethane, 2.5 years old
THROWBACK TO 2008
When we originally established Street and Track grade urethane (5 years ago), very few cars were able to achieve over 275 WHP. Now, with upgraded CDFP internals (cam driven fuel pump) and tuning, over 275 WHP is fairly easy to obtain. While there are other variables (driving characteristics, condition of other mounts, etc), engine output is a primary consideration when choosing urethane for your vehicle.
The good news -- We are always improving our product line, so our urethane must evolve with this additional power. The result is a new and improved approach to our urethane applications. Per mount, we are adding additional urethane options for more detailed urethane levels based off of wheel horsepower. These additional urethane options allow for the end user to get the ideal urethane for their power output.
We are releasing three additional urethane options for the R3, S3, R6, and S6 mounts for 2013/2014 - here is the initial launch:
R3 -- Urethane Options
Class 1 - Factory to 275 WHP (Street) -- (New Formula Now Shipping)
Class 2 - 275 to 400 WHP (Aggressive) -- (New Formula Now Shipping)
Class 3 - 400+ WHP (Track) -- (New Formula Now Shipping)
S3 -- Urethane Options
Class 1 - Factory to 275 WHP (Street) -- (New Formula Now Shipping)
Class 2 - 275 to 400 WHP (Aggressive) -- (New Formula Now Shipping)
Class 3 - 400+ WHP (Track) -- (New Formula Now Shipping)
R6 -- Urethane Options
Class 1 - Factory to 275 WHP (Street) -- (New Formula Now Shipping)
Class 2 - 275 to 400 WHP (Aggressive) -- (New Formula Now Shipping)
Class 3 - 400+ WHP (Track) -- (New Formula Now Shipping)
S6 -- Urethane Options
Class 1 - Factory to 275 WHP (Street) -- (New Formula Now Shipping)
Class 2 - 275 to 400 WHP (Aggressive) -- (New Formula Now Shipping)
Class 3 - 400+ WHP (Track) -- (New Formula Now Shipping)
Urethane Updates:
Class 1, Class 2, & Class 3 Polyurethane -- As of June 23, 2014, all engine and differential mounts are now shipping with the new and improved Class 1, 2, or 3 urethane.
S3/S6 Passenger Side -- Street Urethane formula is new and improved as of May 2013. Hardness was increased for a longer lifespan, minimal NVH change.
Our urethane is a wear component - however, we cover it under our lifetime warranty. Thank you for reading, more details to come!
Article by Cullen