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PostPosted: Wed Jun 28, 2017 7:06 pm 
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EFI Slant 6

Joined: Fri Feb 15, 2008 8:17 am
Posts: 329
Location: Seymour, TN
Car Model: 1965 Dart 270 w/ 66 Valiant front clip
Any advantage/disadvantages to a poly mount vs rubber??

Will probably being going with solid motor mounts if that makes any difference. Not using for street.

Also, all the replacement transmission mounts I have been seeing have only one stud that goes on the bottom side of the cross member . My cross member has a place for two studs. Does this even matter? ('65 Dart).


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PostPosted: Thu Jun 29, 2017 5:46 am 
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EFI Slant 6

Joined: Thu Jun 04, 2015 6:19 pm
Posts: 317
Location: Florida
Car Model:
I was on the poly band wagon for awhile, they look nice, pretty colors, transmit more noise/vibration, cost more, resist movement of something that doesn't move much in the first place and hasn't been a problem moving any amount with OEM style rubber, and I save the best for last, they completely disintegrate without notice for reasons completely unexplained or expected, like sunlight, ozone, grease/oil, wear, heat, etc you name it, manufacturers give one the typical tilted head dog look when you ask them why the sudden failures with poly, usually at non optimal time. :shock:


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PostPosted: Thu Jun 29, 2017 10:40 am 
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Turbo EFI
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Joined: Wed Mar 25, 2009 5:56 pm
Posts: 1315
Location: TEXAS
Car Model:
I use POLY motor mounts and RUBBER trans mount to allow alittle bit of flex where I think it is most needed. This is in a Daily Driver with a stock engine, and has been set-up that way for (3) years without any problems.
The Rubber motor mounts that are available today, to put it mildly, are CRAP! Just do some Searches on this board!

_________________
1964 Dart GT


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PostPosted: Fri Jun 30, 2017 5:25 am 
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Board Sponsor & Moderator
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 16447
Location: Blacksburg, VA
Car Model:
If mostly drags, then I would get poly, or try to find NORS or NOS rubber. Many of the parts store rubber ones are garbage. Do not go for the cheapest one. Energy suspension probably has one.

Lou

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Home of Slant6-powered fun machines


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PostPosted: Fri Jun 30, 2017 7:14 am 
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Joined: Fri Nov 01, 2002 8:20 pm
Posts: 1603
Location: Oxford, Georgia
Car Model:
Dart270 wrote:
Energy suspension probably has one.

Lou


They do. I'm using one on my Dart with Polybushings.com motor mounts.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair


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