New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

Which Mount ? Poly v. Aluminum v. Steel

Thread Tools
 
Search this Thread
 
Old 08-01-12, 01:35 PM
  #1  
Full Member
Thread Starter
 
hhxobey's Avatar
 
Join Date: Nov 2011
Location: Georgia
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
Which Mount ? Poly v. Aluminum v. Steel

Well, I decided to change out both my motor and tranny mounts after realizing some stress fractures in them. I'm some what stumped though, I dont know what mounts to go with. If someone can guide me in the pros and cons of each and which is overall best for my '87 FC. Thank you very much.
Old 08-02-12, 10:17 AM
  #2  
Banned. I got OWNED!!!
iTrader: (2)
 
RTRY_STR's Avatar
 
Join Date: Aug 2012
Location: SoCal
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
I would go with poly if considering driving it on the streets.... unless you dont mind a constant vibration from solid mounts. its a night and day diff.
Old 08-02-12, 01:19 PM
  #3  
Full Member
Thread Starter
 
hhxobey's Avatar
 
Join Date: Nov 2011
Location: Georgia
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RTRY_STR
I would go with poly if considering driving it on the streets.... unless you dont mind a constant vibration from solid mounts. its a night and day diff.
Yeah, it's for my daily driver.
Old 08-02-12, 03:06 PM
  #4  
Urban Combat Vet

iTrader: (16)
 
Sgtblue's Avatar
 
Join Date: Oct 2003
Location: Mid-west
Posts: 12,027
Received 876 Likes on 617 Posts
Poly unless you're into hard launchs and/or have signficantly raised horsepower. In fact, for a street car that's only mildly modded I'd find the softest durometer I could. It will still likely be firmer and last way longer than the old rubber mounts but keep NVH at a minimum.
Old 08-02-12, 05:58 PM
  #5  
Senior Member

iTrader: (1)
 
marclong's Avatar
 
Join Date: Mar 2002
Location: Jefferson , Ga
Posts: 392
Likes: 0
Received 0 Likes on 0 Posts
Stock mounts are good. Comfortable
Old 08-04-12, 10:48 AM
  #6  
Engine, Not Motor

iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes on 91 Posts
Daily driver? Then go with stock mounts.

Solid mounts won't increase vibration that much, however they will bring all of the harshness and noise of the drivetrain into the cabin. You'll be hearing stuff you have never heard before, like the gear lash in the differential.
Old 08-30-12, 08:02 PM
  #7  
LO7
Senior Member

iTrader: (2)
 
LO7's Avatar
 
Join Date: Aug 2012
Location: Quantum Superposition ▲▼
Posts: 274
Received 63 Likes on 31 Posts
If you're driving on the street do Poly... Metal mounts will vibrate the car, and all that. Unless of course you are building a full on racecar.
Old 08-31-12, 11:22 PM
  #8  
This is my social media.

iTrader: (22)
 
dwb87's Avatar
 
Join Date: Jan 2006
Location: WA
Posts: 2,744
Likes: 0
Received 0 Likes on 0 Posts
https://www.rx7club.com/2nd-generati...ntrast-988744/
Old 09-05-12, 07:22 AM
  #9  
Junior Member
 
darksider415's Avatar
 
Join Date: Oct 2008
Location: Alabama, United States
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
I'd go stock, because the added NVH of stiffer mounts isn't really worth it on a DD, in my opinion.

That being said, it's all in how you drive it. If you're doing drag launches at every light, then you probably need to go with stiffer mounts, but the stock ones are fine if you're being civilized. The thing to keep in mind is that the car is 25 years old, and it's very likely the mounts are the originals. Replace with stock and enjoy the car.




All times are GMT -5. The time now is 01:09 AM.