80a RMM installed-lots of vibration
 

I just got a 80a RMM from your company last week and installed it this weekend. Well, the vibration and noise between 1000-2000rpm under any reasonable load is more than I am comfortable with. I now hear new interior panel rattles etc. Granted, the car definitely shifts and responds to throttle input better but not enough for me to justify the vibes on a DD. My questions are how much does break-in help, would a 70a insert make much of a difference;do you sell just the insert to swap, and could there be an install issue that causes more vibrations than expected?

The quality of the part looks great and would appreciate any help. Thanks

Don't be a puss about it? Vibes are natural.

Its natural, it will go away a little bit after you break it in, if you don't want racecar status, go back to that stock one...

I was expecting a couple people to tell me I'm lame. Seems normal on here. I guess I was hoping that JBR or someone would have some constructive ideas.

I thought the 88a would rattle my teeth out compared to the Sure street urethane because of posts like this. Then I finally switch, and although there is a marginal increase at very low rpms it's barely noticeable at normal driving ranges.

Either some folks ares a bit too "sensitive" to any vibration or there are other things possibly amplifying an existing issue?

Its normal, any stiffer mount is going to transfer more noise/vibrations. I had the 88d, didn't care for the vibes, went to the 80d, it's a little better, but still very noticeable.

There are other options, some guys are starting to use the ford efocus rmm, maybe look into that.

If you don't like the NVH of the mount, find a softer one, reinstall OEM, or break it in.

Give it time to break in before your write it off. Every mount, regardless of brand, needs time to break in; so the vibes will settle down.

I've insisted JBR make a "vagina" mount with a rubber bushing. We've probably got a majority that DD the car, and the E-focus mount eliminates wheel hop, firewall bang, and you won't miss shifts. I'm corn tuned doing a little better than 300whp, which also seems to be very common for the DD crowd.

I hate to suggest a Ford OEM part when one of our best vendors with the best customer service could be taking our money instead.

Even if it required more frequent bushing swaps or was prone to material breakdown, it would still be a better solution than inserts on the scrawny OEM mount that is prone to metal fatigue and ultimate failure.

2¢

if you want something that doesn't add nvh get the JBR rmm. shit is so quiet

There is l YouTube videos showing a bottle with water vibrating. If its to much for you to handle put the stock back in. The 70 will vibrate also. If you would have read its all about compromise.

wow they let you off very easy. Why didnt your do research before installing. The price you have to pay because "race car"

As others have said, it will be barely noticeable after break in. For me it was about 1k miles. I drive my car hard on occasion so it's well worth it IMO.

It is worth it if you drive hard or track it.

I don't even notice the vibes from my 88d RMM anymore.

Honestly OP if you want the true performance of an aggressive mount you kind of just need to suck it up. You did buy a performance car after all, not a luxury car with a smooth ride. Either that or at least do some researching first as there are a ton of threads on RMMs on here.

I'd say that the only constructive advise that there is would be to get a mount that better suits your needs.

The only way to research the vibes is to sit in someone else's car that is mounted. Everyone's tolerance for NVH is different, and some cars seem to transmit more or less vibes and noise with the same mounts.

Exhaust mods have a large part in the NVH as well. OP should have no shame in asking for help about something subjective.

Good news is that the vibes are between 1k and 2k and since you'll never drive at those rpms, you're fine. They will lessen as it breaks in and you'll get used to the rest.

I agree that everyone is different and will therefore tolerate NVH differently. However, if he had read the multiple threads about the topic he may have decided that it wasn't worth the NVH to him prior to him purchasing the mount and now being unhappy with it.

As long as the OP gives it 1000 miles or so to break in I think he will be very happy with his purchase, which is what I meant when I recommended he research before committing to a product. The vibes should die down significantly and he will still have the performance of an outstanding product. I was skeptical as well when I first installed my 88d, but now that it's significantly broken in people that ride with me don't even know that I have an upgraded mount.

EDIT: OP, re-torque (or at least check) the bolts to make sure they are at spec after a few hundred miles. If it comes a little loose during break in it will add NVH and multiple threads mention needing to re-torque to fix excessive vibes.

Possible install error? Did you make sure you used the same bolt that connects to the chassis, it made a huge difference for me.

I read a number of threads and it seemed that most people only noticed any vibrations with the AC on. But like exhaust drone, vibration sensitivity varies from person to person and in some cases car to car. I think I will give it a while and see if the break in makes enough of a difference along with checking the bolt tq. I didn't start this thread to bash or say anything negative about the mount itself, just that it was not as I expected from my research.

I used the same one.

If you torqued it properly, applied loctite, then just drive it. Takes time to settle, as every other thread about this says.

Thanks for mentioning the Focus Electric mount possibility. I'm going to give this mount some break-in time first but that's now the back-up plan.

I've been running this mount for close to a year now and love it.
The only vibes I notice are getting out of first gear and when cruising in 6th @60> mph
My shit barely vibes when the AC is on too.

install pmm and tmm. Driver for 5k miles with all mounts in. Replace pmm and tmm with stock. Your car will never seem so quiet and smooth.

No vibes with my 88a RMM. Maybe there is a vibrator in your ass?

Nothing else needs to be said.

The point has been made.

OP, recheck everything per the instructions and then do it again. Give it close to 1k miles before you decide there is too much NVH. Along with what others said, if you were looking for performance but the feel of a DD you would have read more in plenty of threads that people decided to do with the 70d and that the people want *racecar* were more then likely running 80-88d mounts.

I understand that your just expressing your views. But you really need to give things like this time before you can understand how it truly performs, bringing it to it's limits and understanding the things you sacrifice with performance sometimes.

Come back in 900-1k miles and then let us know how you feel about it.

-Pat

Give it up to 5k miles before removing! Then make a decision. I think you will thank us down the road for real. If not go with 70 duro after the 5k break in. You will still be able to resell it no prob. People love those mounts.

Takes a couple weeks for them to settle. Give it a couple months and it will really be good.

As mentioned above, confirm the installation. Best to remove it and reinstall. Then let it break in. You have a a great mount now. Give it some time.

I appreciate the help. I'll update after breaking it in and re-installing so if someone goes searching with the same question they have another info source.

How much of an improvement is the 70d over stock? Is it still significant enough to warrant a $125 price tag? Because I would like my car to have slightly better performance but I will not be driving it hard or tracking it.

Anything is a vast improvement over stock. That mount doesn't even belong on a prius. With that being said, I think the 70d is a pretty damn comfortable mount.

Dont over tigten the bolts. Domt under tighten the bolts. Check the bolts for tightness frequently.

The only things that rattle for me are:
Plastic containter on roof that holds glasses, lights for front seats and sun roof controls.
Cig container
Cup holder

This is fixable. Just need to get something soft material like rubber to stop the rattles.

So when one decides he wants a motor mount does he bother reading about them and see what to expect? Or does one buy it and say hey I got a motor mount but then not know anything about them? Just curious.

I bought all three in highest, after install I was thinking, "Shit, what did I do." Then a few thousand miles later all I hear is all the engine noises. Sometimes I wish I would have went with the 70 all around, especially since the rear mount design update, but I'm a guy so I can justify any decision by saying "fuck it"

70 would do nothing for noise an little for vibration. You made the right choice.

your making me wish i never got the 70d trio now. I felt like i was "race car" till you posted this ;) lol

Well once that 70 PMM is all broken in, you can sell it to me and get the 88 :)

Haha thinking about that pmm now? You got all that power!