Breaking in/settling Prothane Motor Mounts

[AnotherS197GT]

I picked up a set of Prothane motor mounts and installed them Friday. I have awful vibrations between 1500-2000 RPM, and any time the engine bogs and falls under 750 RPM. I had these mounts in the past, and they were so much better then. The car was stiffer and there was more NVH, but nothing like this. Last time I had these, I had 127500s and it wasn't this bad. I've already tried loosening the mounts and sliding everything around, but the vibrations remain the same. I saw some threads that said to check the balancer, and it seems fine to me. My stock mounts are completely shot, so I don't want to put them back in, and I would rather keep the Prothanes if I can get this figured out.

Any tips or tricks? I plan on loosening the motor mounts and trans mount up tonight and firing the engine up, letting everything settle where it wants, then torquing it all back down. Good idea? Bad idea? Should I just burn this car to the ground?

 

[o2sys]

Maybe your older now and you can't handle the nvh. Lol but that's how I got. I couldn't stand the poly mounts anymore and putting new OEM mounts and I wondered why I even did it in the first place.

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[travelers]

Some mounts have different prothane density or hardness which will make a difference.

 

[o2sys]

I think prothane only carries one type of durometer bushings. They state that black and red is the same.

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[AnotherS197GT]

Yep, they're only 1 durometer. Hopefully I haven't gotten so old in the last 2 years that I can't handle them. Not much else to do at this point other than try to live with it,
Or get some OEM replacements. I can't help but think there is a reason the car is shaking like hell at 1500 RPM and id like to fix it, not hide it.

 

[o2sys]

When I had poly mounts it shook like that at low RPMS, the rear view mirror would vibrate. I did get used to it, but not to point where it was bearable.