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Thread: Polymer Engine Mounts
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09-25-2007, 08:07 PM #1
- Join Date
- Apr 2006
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- Chowchilla CA
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- 69
- Posts
- 287
White- 2001 Z28
Polymer Engine Mounts
My Engine is out of the chassis for Head/cam upgrades. When it goes back in I am considering using Polymer engine mounts. My car has 108K on it and although the mounts look good I have the opportunity to replace them. Good/bad idea?
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09-25-2007, 08:26 PM #2
Not a bad idea really, especially if you have headers and a y-pipe. I wish I had done that myself.
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09-29-2007, 10:08 AM #3
- Join Date
- May 2007
- Location
- Columbia, MO
- Posts
- 111
Medium Blue Metallic- 1999 Pontiac Trans Am
Is prothane the only brand or has anyone found others? From what I hear you have some more vibration but no worries about headers and such banging around.
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09-29-2007, 10:36 AM #4
I used Prothane. It does give a lot more road noise, but at 108k I would replace them. Mine had 122k when I did the headers, heads, cam etc etc. Another "while your in there" mod. I also did my tranny mount in poly. I didnt think it vibrated much, but a buddy drove it the other day and says its definately vibrating more. I dont care because I am more interested in performance than confort.
No matter what your choice though, at your mileage replace them with something. Even if its new OE mounts.http://www.fquick.com/mnypitZ
98 Z28 a little here and a little there
03 Saab 9-5 ARC
80 Triumph TR7
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09-29-2007, 12:36 PM #5
- Join Date
- Aug 2005
- Location
- Thornton, CO
- Posts
- 23,773
Red Tint Jewelcoat- 2008 Trailblazer SS
Careful with the Prothane mounts. They lift the motor up just a hair....and if you have a low sitting strut tower brace (like SLP's) it can break your intake.
I got lucky, just took a little plastic off my FAST 90mm, the raised lettering on it got chipped a bit.
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09-29-2007, 12:38 PM #6
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09-29-2007, 02:35 PM #7
Definitely go with poly mounts if you're going with heads/cam upgrades. My stock drivers side mount was toast at 87K, the heat really takes its toll on the rubber.
The last thing you want with a ton of power is the powertrain moving around in the chassis, thats how things get broken.
I upgraded to poly mounts when I did my headers. Definitely more vibs and road noise, but its good to know the motor and trans aren't moving all over the place when you're ripping on it. Not to mention it prevents the exhaust from banging the floor as well, which can get really annoying.
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09-29-2007, 07:55 PM #8
- Join Date
- Apr 2006
- Location
- Chowchilla CA
- Age
- 69
- Posts
- 287
White- 2001 Z28
Thanks for the input! the engine is going back in with the Prothane mounts. I value speed first! I will be very careful with the tower brace, I run a BMR brace. My tranny mount is already a prothane mount.
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