Progress Thread 95 2-Top Cobra Build Thread- Never ending

I noticed literally zero difference when going from all rubber to poly mounts for everything. My rubber mounts were still in perfectly good shape when I replaced them. Only reason is because I put a new engine in and I wasn’t going to reuse the rubber ones.

Maybe oem uses rubber mounts because they’re cheaper.

96pushrod said:

I noticed literally zero difference when going from all rubber to poly mounts for everything.

My rubber mounts were still in perfectly good shape when I replaced them

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. Only reason is because I put a new engine in and I wasn’t going to reuse the rubber ones.

Maybe oem uses rubber mounts because they’re cheaper.

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Says the guy that just changed out a set of 22 year old motor mounts.

CarMichael Angelo said:

Says the guy that just changed out a set of 22 year old motor mounts.

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No, they were replaced In 2015 when the car was converted from a v6 to a v8.

Anything else you wanna call me out on?

Not a mustang, but I changed out all of my old rubber bushings in my old Dodge truck. It made it handle FAR better than the old rubber ones. Not as much deflection I guess.

96pushrod said:

No, they were replaced In 2015 when the car was converted from a v6 to a v8.

Anything else you wanna call me out on?

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My original point was that poly mounts are more rigid than rubber mounts, and there is a vibration penalty when converting to them. Because you can't tell any difference between the rubber one that was there before doesn't mean that there isn't any.

Poly bushings, in every other scenario are way more restrictive in every other application they're used in. Suspensions become more likely to bind in certain situations, steering racks transmit more road "feel" back through the steering and Poly motor mounts eliminate excessive engine movement. and THAT translates into increased vibration felt in the chassis.

My question to you would be: If you were a company making a poly motor mount, and charging twice over what a rubber one costs...How effective would your "testimony" be if you were quoted as saying " I felt no difference between the rubber and the poly one"

I don't know about you, but if I read that, I'd have to question what you consider a "difference". And I'd ask myself....Why am I buying these again?

Great marketing ploy.

The benefit to a poly mount is that it's less harsh than a full solid mount ( which I have). And ill tell ya, there is definitely vibration that can be felt in my car. its not like people think...when an engine is being held rigidly...the vibration is felt in the form of harmonics...the engine gets at a certain rpm while cruising and you feel it like a pulse...

It's there on your car too...you just have to know what to look for.

What I’m saying is I notice zero nvh, if you do that sucks. While I don’t mean to speak for everyone, most people don’t notice any recognizable downsides to the poly mounts, except a larger upfront cost.

I’d put them in again without thinking twice.