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05-30-2006, 10:05 PM
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#1
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Join Date: Aug 2004
Location: North Jersey
Posts: 3,047
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Opinions on Poly vs. Rubber Motor Mounts?
Hey all,
The 305 is coming out on the weekend, and the 355 is going in - come hell or high water. Any opinions on stock rubber vs. poly motor mounts? I'm thinking just some good stock replacements will be fine, assuming I even need to change them. The car only has 89K miles on it.
Your thoughts??
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Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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05-30-2006, 10:08 PM
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#2
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NJFBOA Supporting Sponsor
Join Date: Jan 2006
Posts: 2,372
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cant speak from experiance but i always read ect bout what a difference poly mounts make... im prolly gonna go with them when i put on some headers ect
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www.JerseyDevilDetails.com
2002 Trans am ws6.. black on black bolt ons with a JS built trans, 3200 stall,TTM's w/315's, full umi adj rear suspension, strano springs/sways, and koni 4/4's
2015 Forester XT touring... STI Sway bars
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05-30-2006, 10:29 PM
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#3
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,693
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it will vibrate a little but it will be well worth it... so far i have heard 2 different people call poly motor mounts their "favorite bolt on." i'm gonna do it when i do my headers
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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05-31-2006, 09:15 AM
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#4
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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I found little difference between rubber and poly as far as vibration on engine mounts, I noticed the trans mounts do transmit more vibration. But I perfer poly in that the do not deterorate like rubber and cause the engine to sink.
My vote is for Poly.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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05-31-2006, 12:14 PM
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#5
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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I vote poly too.
The only reason I don't have them is that I got a brand new set of rubber mounts for $5.
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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05-31-2006, 01:08 PM
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#6
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Join Date: Dec 2005
Location: Colonia, NJ
Posts: 205
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poly mounts are great
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05-31-2006, 01:10 PM
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#7
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MIR
Join Date: Jul 2005
Posts: 9,692
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poly > rubber
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05-31-2006, 04:09 PM
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#8
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Join Date: Nov 2004
Posts: 3,530
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poly>rubber and any time a engine is out and it has some miles on it always do mounts.
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05-31-2006, 09:00 PM
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#9
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Join Date: Aug 2004
Location: North Jersey
Posts: 3,047
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I will most likely do the poly, but I'm concerned with vibration and noise. My wife will occasionally go for a ride in the car too and I don't wanna hear her complain about it.  If someone could convince me it won't be any noisier I'll do it.
Is it OK to run a solid rubber tranny mount with poly engine mounts?
__________________
Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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06-01-2006, 05:11 AM
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#10
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Join Date: Nov 2004
Posts: 3,530
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my 86 is all poly first time i started her up car shook like a bitch almost vibrated the dash pad loose its gotten better and i assume once i get some miles on the car it will almost completly go away and thats on bmr's k member with the built in mounts, i wouldn't recomend doing poly mounts then a rubber tranny as it will most likely tear or brake a lot sooner.
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06-01-2006, 01:16 PM
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#11
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Trans mounts are cheap enough that you could try the poly/rubber combo to see how it is, and if you tear up the rubber trans mount too quickly, you'll just have to upgrade.
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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06-01-2006, 02:19 PM
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#12
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I will beat you with a toaster!
Join Date: Sep 2004
Posts: 6,054
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I will go with poly over rubber any day. Especially trans/engine mounts. I went through 4 rubber trans mounts since i got my car 3 years ago and finally went to poly this year.
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