Boosted Twins and motor mounts
 

Lets hear it guys what are you running and how does it feel?

I'm personally torn between perrin and STI, I've heard cusco are extremely stiff and cause alot of extra noise and vibration (basically a race mount).

Solid mount or GTFO

Perrin mounts reduced my nvh post sc. Engine had been moving enough that the ic pipes were rubbing

Perrin since boost day one. No complains.

yup

i have stock mounts, and have ridden in cars with the perrin mounts as well as the cusco. tbh i didn't really notice any difference between the perrin and cusco, both are just a little more 'vibey' than stock. i guess if you were to do a back-to-back maybe it'd be more noticeable, but the cuscos didn't seem particularly harsh to me. i like the smoothness of the stock mounts personally. i haven't noticed any adverse effects, and will replace them with something stronger if i ever do.

The Cusco mounts are nice. I have them in my car with turbo. Made a huge difference because my stock mounts were SHOT, the engine moved all over, you could feel it while driving. Slight increase in NVH. I wouldn't call them race mounts because they have either rubber or polyurethane bushings in them.

i have the perrin and have ridden in all three. Can't go wrong with any of the choices listed.

Doing perrin when i put my turbo kit on

cusco herr no regrets because racecar

And as I myself asked this awhile back in another thread the consensus was that the STI ones were like stock in regards to NVH and styling as well but obviously a higher durometer to provide better stability over stock. I can't say I have not riden in this car with any above being discussed.

I love my STI mounts, Ive had cusco on past cars just wanted to try something different.

same as david

saved them for the next

I posted this in the review section but thought i would share with you guys. If you have these on your car please check them out for your safety.

This review is about my experience with Perrin's Engine Mounts for Force Induction Application:mad0260:

Purchase Date: Jan 2013
Received Date: April 2013
Installed Date: April 15, 2013


***The pictures kinda sum it all up. The mounts are melting!***:mad0260:
Let me start off by saying I live in Florida and this car has been FI(Perrin Tuned Vortech & FA20Club Turbo) . The exhaust system on the car was a Perrin 2.5 header back. We only found this problem because I was switching setups to a 3inch header back exhaust system. Huge props to @Ironsquid for seeing it. I also have every cooling product on the car you can buy to keep engine bay temps down.(vented hood, ceramic coating, radiator, oil cooler...etc)

Quality: 4/5
Design looks great. Mounts felt like quality in hand. When on the car the engine mounts kept the engine from rocking. Very little NVH.

Packaging: 5/5
Came in a nice box with bubble wrap well packaged.

Install:
Can't comment on this mechanic installed them.

Durability: 1/5
The mounts have only been on for 10 months and this is the condition of them. The mount is disentgrating you can pick pieces of urethane right off.

Damn, that's disappointing to hear. maybe @Jeff@Perrin can help you out?

FTFY :D I have them too and I'm concerned.

@PERRIN

@PERRIN_ADAM

@PERRIN_Chris

@PERRIN_Christina

@PERRIN_Jeff

@PERRIN_Mladen

I have some Cusco ones sitting in a box here I'm waiting to install along with my header/overpipe. I used them on my WRX in the past and they worked great. Like others have said they aren't solid mounts.

My Perrin mounts would not fit with the Perrin overpipe. I sent them back. After seeing these pics, I'm glad I stayed with stock.

Smh

Guess i might refund my pair


Sent from my IBrick

That is not normal for sure, sending PM! Sorry for the hassle. I'm not sure how many customers of ours have turbo kits installed with our header, this is the first we've seen melt! It could be that it will need additional head shielding.

I also wanted to add that with aftermarket headers and especially turbo kits with dyno time, additional shielding is going to absolutely needed on the header if it's going to be used with either the stock engine mounts or aftermarket mounts. These cars aren't built from the factory to be FI, so wrapping, shields, will need to be used.

The PERRIN engine mounts work fine on a car that uses the factory header. I believe you have an aftermarket header that was installed, which was causing the fitment issue. We have never had that issue with a factory header installed.

I think its safe to say over 90% of Perrin Engine Mounts customers and target market for them have an aftermarket header.

To extract the kind of power from the engine that merits upgrading mounts, one of the first steps is upgrading the stock header.

I used the stock mounts for all 15,000 of my forced induction miles with no issues. I really don't think aftermarket ones are required.

But they are pretty helpful with 3" overpipes

I agree that not allowing the motor to move as much can help with large overpipe clearance issues where it can contact the sway bar or the subframe. That is about the only reason I can see doing it on a street car, and I would still prefer a better designed part that wouldn't make contact on the OEM mounts.

With UEL headers even 2.5" Overpipes can have a tendency to bang against the suspension. I got the Perrin mounts as soon as my AVO kit was installed to make sure.

As far as NVH, my car was a massage chair when idling under 1000 RPMs, but we had to raise the idle because of my clutch so it's about back to normal. Though under heavy engine braking the car vibrates.

Edit: Based on reading about the melting mounts I guess I might take a look at some point. Though PTuning was just staring at my car for weeks and I feel like they would have noticed something like that. Maybe the fact that my AVO headers have always been ceramic coated has helped prevent that issue.

Gotta disagree. Have you seen how much movement the engine has in the cradle in on/off throttle? Engine mounts are probably one of the best ways to improve driveline performance in on/off throttle and ensure that torque is going to the wheels instead of needless movement of the engine/trans assembly. You can literally feel the entire driveline moving during shifting and on/off throttle conditions.

I saw how much it could move when I installed my clutch, and I couldn't get the damn engine to stop moving so I could get the transmission to seat. I still prefer the less NVH approach of the OEM mounts on the street. I am not sure why we didn't get the rear dogbone mount that the WRX/STI have.

That too. I remember a non-twin owner pointing out the engine wobble when I would hit redline free revs. You can see it in my dyno vids too when I was doing the stock baseline pulls.

I wondered about the rear dogbone as well, but I never bothered upgrading mine on the WRX - Group-N engine mounts fixed all my concerns with no additional NVH outside of during cranking.
Yup, you can clearly see it in my baseline dyno vid as well. @Mach V Dan even made a comment on it at the time, too.

I'm debating on making the switch to some STi mounts in my Innovate equipped BRZ.

It is definetly possible to run the PERRIN engine mounts on a turbo or aftermarket header car. As long as there is proper airflow during dyno runs, with proper shielding, wrap, etc you will be fine. We've been selling these for a while, and I believe this is the first time I've heard of a melted mount!

I have them and will inspect them later on. I have been running with no tray under the engine since the new turbo kit got installed. This is just one more reason to not mount it :D

I have the Perrin motor mounts, but will likely be going back to stock or going with different mounts.

Sent from my Nexus Five, I'm Alive!

I don't get why the drastic overreaction.....

It's one reported issue among a LOT of mounts sold....

Al least verify you have the problem before spending more money.

Chris thank you for taking care of the issue.

Lol.

I do have a problem. I'm not a lemming.

I've noticed an annoying harmonic resonance from these mounts at highway speed on anything other than glass smooth roads. It could be due to also having the Perrin trans mount in combination. I don't know. Going back to stock mounts is a test to determine the true source of the resonance. It started right after I installed the Perrin motor mounts. I already had the Perrin trans mount in combination. I have many modifications, which I regret not doing in slow succession. It's hard to trace issues when too many things change.

From a dead stop launch, the mounts are doing their job no doubt.

I have little experience with imports. My prior experience has predominantly been on domestic platforms. On those platforms, I've experimented with solid mounts and the increased feedback through the chassis was welcome since it was mostly vibrational. I don't have a problem with a seat massage. This 'NVH' I'm getting from the poly-based Perrin's is more audible rather than vibrational. Combine with the lack of insulating material in the 86 and it gets old pretty quick.

Also, I don't always post my problems right away on the forum or any other. I don't want to be that guy. I tend to do a lot of troubleshooting before saying anything.

Sent from my Nexus Five, I'm Alive!

Just installed the Cusco mounts and they added a fair bit of NVH.

cusco sitting in my garage waiting to go on :burnrubber:

They definitely transmit more NVH than the ones on my WRX did. With a grabby clutch it would pretty brutal... Not an issue at highway speeds at all just low RPM starting and stopping and you feel it a bit at high RPMs through the pedal.

I put the Cusco mounts on along with a P&L header and Tomei front pipe, to go with my Perrin non-resonated catback. My wife says i ruined the car because it vibrates too much and sounds like shit. :( :D

Gonna have to get that resonated section for the Perrin.