Second thoughts on poly motor/trans mounts
Thread Starter
Melting Slicks
Joined: Apr 2007
Posts: 2,987
Likes: 16
From: Phoenix
Second thoughts on poly motor/trans mounts
I ordered the Pfadt JOC shock/sway package along with their motor/trans mounts. I'm having second thoughts of putting them on a daily driver. My car is still under warranty I can just get the motor mounts replaced if they leak.
Who here daily drives with these mounts?
Who here daily drives with these mounts?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
I have their motor mounts and they are great in my car. I have a 07 Z06 with a forged LS7 with an modified TVS2300 making 14 PSI of boost. They work fine in my car and does not transmit any extra drivetrain noise or vibrations. I have installed their transmission mounts and have had mixed reviews from the guys that has them on their daily drivers. The track guys are not a problem but for a daily driver the main complaint is the extra noise and a bit of vibration.
Burning Brakes
Joined: May 2006
Posts: 1,110
Likes: 16
From: stuart fl
i have both on my car and i do a lot of street cruisning in it, they dont bother me one bit. i dont seem to get any noise ( my car still has stock mufflers and stock cam) form them at all, i do seem to get the slightest bit of vibration but you probably wouldnt notice it if you just got im my car.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Our engine and trans mounts were designed to reduce power train shake while under hard acceleration which can lead to destructive wheel hop. The car will feel much more responsive to throttle inputs and definitely feel more solid while on the road. Keep in mind that we can't test for every header/exhaust/cam combination that's available for these cars, but in our testing with the stock components on our own C6Z there was little effect on daily driveability. That being said they definitely are a performance oriented modification and can increase Noise/Vibration/Harshness.
Unfortunately this is one of those catch 22 situations as you can't have the performance and reliability of a solid mount without tradeoffs to noise and vibration. Keep in mind that our trans and engine mounts are not a completely solid mount as they both use Polyurethane bushings. They both use a polyurethane that is stiff enough to be considered a good performance improvement but that is also compliant enough to be driveable while on the street.
Ride quality is extremely subjective and we are happy to report that most of our users of these mounts are using them for their performance increase and the slight noise/vibration tradeoff is well worth the effort of installation.
Unfortunately this is one of those catch 22 situations as you can't have the performance and reliability of a solid mount without tradeoffs to noise and vibration. Keep in mind that our trans and engine mounts are not a completely solid mount as they both use Polyurethane bushings. They both use a polyurethane that is stiff enough to be considered a good performance improvement but that is also compliant enough to be driveable while on the street.
Ride quality is extremely subjective and we are happy to report that most of our users of these mounts are using them for their performance increase and the slight noise/vibration tradeoff is well worth the effort of installation.
