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Jan 14, 2020 | 06:19 AM

f8lvenom

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Motor mounts

Hi folks, I’ve got a 2002 Firehawk making 740rwhp. Under hard acceleration, engine is twisting causing y-pipe to bang against frame. I’m wondering would polyurethane motor mounts prevent this? Any recommendations? Thanks folks!

Jan 14, 2020 | 08:23 AM

MidwestChassis2

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The factories probably have some wear on them so replacing them with a insert may not be a bad idea or even going straight solid and never have to worry about them again.

https://midwestchassis.com/products/...or-mounts-pair

Jan 14, 2020 | 11:18 AM

TA_Freak

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From: Woodstock, GA

I'm a fan of the prothane inserts. Insert them into the clamshell. If you do go that route, make sure that your transmission mount is rubber, or you may get some vibration.

Jan 14, 2020 | 05:51 PM

sjsingle1

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From: Fort Worth TX

prothane....all day and nite !

stock rubber for the tranny.........

Jan 14, 2020 | 08:13 PM

00PewterSS

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I had poly mounts for that very reason on the engine, the y-pipe was hitting the floor... then I added one to the trans and I found it improves shift feel. Last year I switched to solid engine mounts with the poly trans mount and it isn't that bad. If you don't really care about some extra vibration I would just get solid motor mounts.

Jan 14, 2020 | 09:48 PM

f8lvenom

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Thanks folks. Prothane doesn't list the inserts for my application? What advantages/disadvantages do the inserts provide vs. solid mounts?

Jan 15, 2020 | 12:23 PM

Vicious95Z28

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I’ve got Prothane on my car for the engine and trans mounts and they’ve always done well. If Prothane doesn’t offer the bushings for your application maybe try Energy Suspension. Idk If they have then but I would think someone should with the popularity of LS F bodies. You can always go solid as long as you don’t mind feeling the vibrations through the car. For some that’s game changer.

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Jan 21, 2020 | 10:53 PM

91 Z28

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From: Armstrong BC

Go with solid motor mounts. Problem solved

Jan 21, 2020 | 11:23 PM

#10

Chrisingermany

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I also say go with solid. I went from beat up rubber to solid and it really didn't add much vibrations or noise.

Mar 23, 2020 | 11:08 PM

#11

f8lvenom

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Bumping this back up. Still on the fence between the prothane inserts and solid mounts. Help me make up my mind lol.

Mar 23, 2020 | 11:12 PM

#12

91 Z28

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From: Armstrong BC

Quote:

Originally Posted by f8lvenom

Bumping this back up. Still on the fence between the prothane inserts and solid mounts. Help me make up my mind lol.

Go solid. There's nothing to wear out

Mar 24, 2020 | 06:26 AM

#13

sjsingle1

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From: Fort Worth TX

my poly has not worn out.....10 yrs goin strong

Mar 24, 2020 | 10:20 AM

#14

MidwestChassis2

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Quote:

Originally Posted by f8lvenom

Bumping this back up. Still on the fence between the prothane inserts and solid mounts. Help me make up my mind lol.

I will help you out with your decision. On sale while supplies last.

Midwest Chassis Solid Engine Mounts 10% OFF (CLICK)

Mar 24, 2020 | 04:52 PM

#15

f8lvenom

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Quote:

Originally Posted by MidwestChassis2

I will help you out with your decision. On sale while supplies last.

Midwest Chassis Solid Engine Mounts 10% OFF (CLICK)

What can I expect in terms of vibration etc?

Mar 26, 2020 | 08:19 AM

#16

MidwestChassis2

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Quote:

Originally Posted by f8lvenom

What can I expect in terms of vibration etc?

Some say it isn't any different than what they noticed from their warn out and failing factory motor mounts.

Mar 26, 2020 | 10:21 AM

#17

Stitch1717

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From: Lower Sackville, NS, Canada

I did Poly motor mounts in my 01 firebird (in 2012) and it stopped the exhaust hitting 100% and they are still going strong! My old mounts didn't look worn, they only had 58000km on them but the exhaust hit the floor without the poly.