Poly motor mounts. Vibration problems?

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Mar 13, 2010 | 05:34 PM

94FBIRD

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From: Highlands Ranch, CO

Poly motor mounts. Vibration problems?

I'm getting ready to put in a set of LPP headers and was going to change the motor mounts while I'm at it. If I use the poly motor mounts, how much do they increase the vibration in the car from the engine? I'm expecting some vibration increase, but is it unbearable? Should I stick with stock rubber mounts? TIA.

Mar 13, 2010 | 05:39 PM

94Z28'MachThis'

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From: West Lafayette In

just installed LPP headers and y... along with poly motor mounts.. do the motor mounts first.. second delete your oil cooler.. it will be in the way of your LPP's ... then bolt up the LPP's.. My car is about to start up... hopefully tonite... ill get back to you on the vibrations... this entire project.. has blown.. my car has put up more of a fight than i ever thought possible.. hopefully your car loves you.. mine loved me before i went changing her... i guess she thought she was fast enough.. lol...

Mar 13, 2010 | 06:54 PM

jaycenk

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From: Holiday, FL

Quote:

Originally Posted by 94Z28'MachThis'

lol someone once said working on an LT1 is like making a deal with the devil lol I'll agree on that

Mar 13, 2010 | 06:57 PM

bigj2717

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From: San Antonio, TX

I've had them for years and when the car was just bolt-ons it didn't transfer too much vibration. Now with a cam its alittle more but I still don't think there too bad. If you install them you also might what to do a poly trans mount too because if you run poly motor mounts and a rubber trans mount the tend to work against each other and break the trans mount

Mar 13, 2010 | 07:03 PM

stburgpete

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From: Winter Haven, Florida

Quote:

Originally Posted by 94Z28'MachThis'

I will be here doing this soon. Sounds like one hell of a lot of fun. Cann't wait.

Mar 13, 2010 | 09:08 PM

wrd1972

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From: Central Kentucky

I installed poly mounts once and could not stand the vibes. Went back to rubber.

Mar 13, 2010 | 09:20 PM

Elliott's94Z

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From: Oregon Grown

I'm running the LPP's with Poly Motor mounts. Haven't noticed any extra vibration on my end.

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Mar 14, 2010 | 01:17 AM

Torque Fiend

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From: Chicago

I have them too, and if there is any increase it's minimal. What I do know, is that driving the car just feels so nice now, like everything is in it's place and it just responds. No slop.

Mar 14, 2010 | 01:54 PM

#10

MattSapp95_T/A

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From: Macclenny Florida

I have them and I can't tell much difference over stock either....

Matt

Mar 14, 2010 | 02:54 PM

#11

kmracer

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From: Washington DC

solid motor mounts are much better. and if you're driving an lt1, and complain about vibration, where are your *****?

Mar 14, 2010 | 03:01 PM

#12

the_merv

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From: The Beach...

^^X2..these cars are not cadillacs..lol

I have Poly Mounts with my 408, it's very smooth..maybe cause it's a balanced Engine.

They were a bitch to install though..I'll do everything I can to not have to pull that thing off of the K-member..lol

Mar 14, 2010 | 03:29 PM

#13

leadfoot4

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From: Webster, NY

Quote:

Originally Posted by MattSapp95_T/A

I have them and I can't tell much difference over stock either....

Matt

Me neither.....

Mar 14, 2010 | 04:22 PM

#14

kmracer

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Quote:

Originally Posted by the_merv

exactly. i did solids on an ls1, way easy, lighter, and they're more compact. took maybe 30 min to do. no drilling rivets hah.

Mar 14, 2010 | 10:10 PM

#15

Elliott's94Z

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From: Oregon Grown

Solids, plastic, molded clay whatever

If you can't handle how these cars ride/handle then you are in the wrong game.

Last edited by Elliott's94Z; Mar 15, 2010 at 11:18 AM.

Mar 14, 2010 | 11:55 PM

#16

the_merv

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From: The Beach...

^^You mean aren't..

Mar 15, 2010 | 11:18 AM

#17

Elliott's94Z

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From: Oregon Grown

^^ I fixed it lol...I left out "wrong"

Mar 15, 2010 | 02:18 PM

#18

94Z28'MachThis'

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From: West Lafayette In

a three day project turned into a 10 day ordeal from hell.. the car is coming off jackstands at around 7 tonite... i might even put 1 mile on the new clutch