Motor Mounts
Thread Starter
Pro
Joined: Sep 2014
Posts: 513
Likes: 11
From: Hills of Tennessee TN
Motor Mounts
I will be doing a header install shortly on a 58,000 C5. I will also be installing new motor mounts to get maximum engine stability as well as maximum clearances for the headers. This will be an 90% street, A4, 3.42 rear, and soon to be centri. FI car at a little over 600 FWHP.
Questions:
1. What would you suggest in the way of motor mount material for this application? Solid, Poly, stock, etc. Mostly street driven but also interested in performance, just don't want a buzzing, vibrating car.
2. I know some headers can be a pain for fitment. If I run into clearance issues with new mounts I am thinking I might do a solid, flat washer style, 1/8 to 3/16 max thick spacer under the mounts to create a smidgen more clearance. Has anyone done this? What is you opinion?
Thanks
Questions:
1. What would you suggest in the way of motor mount material for this application? Solid, Poly, stock, etc. Mostly street driven but also interested in performance, just don't want a buzzing, vibrating car.
2. I know some headers can be a pain for fitment. If I run into clearance issues with new mounts I am thinking I might do a solid, flat washer style, 1/8 to 3/16 max thick spacer under the mounts to create a smidgen more clearance. Has anyone done this? What is you opinion?
Thanks
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,441
Likes: 2,186
From: Buffalo Texas
I asked the same question, had answers all through the range from solid to stock. I wanted the same smooth that I have now so I went with stock. Then I saw how hard they were to install and I am waiting til next winter when i take my headers back out to have them coated !!!
.
Joined: Apr 2013
Posts: 5,035
Likes: 1,156
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Burning Brakes
Joined: May 2013
Posts: 1,249
Likes: 142
From: Lynn MA
Here ya go..Just get the heat wrap also
https://www.corvetteforum.com/forums...or-mounts.html
https://www.corvetteforum.com/forums...or-mounts.html
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I have pfadt mounts and love those, even cammed the motor will not move at all... I don't like the design of the hinsons as much but I would much rather have them over a stock mount... if you are going to boost it and make 600+ then I would definitely get something better than stock
AMP Racing
Joined: Aug 2006
Posts: 10,756
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
I've installed Hinson mounts on all 3 of my C5s. 2 of the shorter size and one of the stock size.
No vibrations and they work great.
No vibrations and they work great.
