034Motorsport Billet Aluminium Mounts + HPA Motorsports Core Interlock 90A Review

[SKorea808]

Excellent review and feedback. :w00t: As you sorta mentioned above, I think your 90a puck is causing more than average NVH. I'm still looking forward to installing mine and I'm not upgrading the dogbone nor do I have any puck. I just have a "cut" 65a Neuspeed insert which has been in the car for two years now.

I've had the HPA Motorsports Core Interlock Lower Subframe Mount (90A) the same duration I had my SPM Mounts (75A), I know what NVH is, I know what exactly I had when I was using SPM Mounts (75A) along with HPA Motorsports Core Interlock Lower Subframe Mount (90A). The NVH I have now is much more than my previous combination but you wouldn't know because you don't have a setup like this installed. 4k miles on the HPA 90A, 280 miles on the 034 Billet Mounts.

Great to know, thanks! When I installed brand new 034 "street" mounts they had a lot of NVH for about 500 miles. Once they broke-in its almost completely gone. I'm gambling that these new 034 "billet" mounts will need a break-in period as well and I think the NVH will be more than the "street" mounts but less than the urethane mounts (e.g. BSH, VF, SPM, etc)

Most certainly not. These have MUCH more NVH than polyurethane. Either you didn't specifically read that I had polyurethane mounts prior to install (SPM Mounts 75A) or just chose to ignore it. Unless you had my previous setup, you would have no idea how much more NVH I gained just from switching over, not that it bothers me but it would most definitely bother and deter most you. Also, I've had my HPA 90A well before installing the 034 Billet Mounts.

OP has the HPA 90 puck which a big differentiator from what I will be running. His review is great but we have to take this into consideration

As I mentioned above, my NVH wasn't bad at all when I had SPM Mounts (75A) AND HPA 90A. When I switched over to the 034 Billet Mounts NVH skyrocketed and if you relook at my summary, you'll see where NVH is present, in places and RPMs not seen with any other mount combination.

This.

I just installed BFI Stage 1 (70a) engine and transmission mounts, with the HPA 75a puck, and it's smooth as butter - coming from a full SPM setup which was harsh as all getup .

The 90a puck likely contributes most of the NVH OP is reporting! I would expect the 034 mounts with a 75a puck to be very similar to what I'm running, which is completely comfortable

Sent from my iPhone using Tapatalk

The HPA 90A is a contributor but is most definitely not contributing the most NVH. Read above, I had other mounts installed prior to switching over, I already had the HPA 90A for over 4kmiles.



And for the record, I also run H&R RSS Clubsports (track suspension 515lb front linear/570lb rear linear/harsh matched dampening) along with Extreme Performance Tires (Autocross) Potenza RE-71Rs, rear seat delete, spare tire delete, literally straight exhaust (custom SPM Turbo-back).. I KNOW what NVH is and my car more than likely has more than 99% of the people here since its in a full track configuration. Its loud, it vibrates alot, at any rpm and speed, interior is loud. It doesn't bother me but I'm trying to make sure YOU guys understand what exactly I am experiencing so you make the right decision if these are for you. Next thing I know you'll be installing them then bitching about how much NVH there is and you want a refund.

 

[SKorea808]

Also for the record, I am still continuing evaluating and re-evaluating these mounts on a daily basis for certain people as well the rest of you here that's interested in results and changes during different temperatures and mileage. Not trying to deter any of you from trying these out yourselves, but to think that these will have less NVH than polyurethane or that one mount (HPA 90A) is contributing most of the NVH whereas the 034 Billet Mounts are literally solid mounts with very little rubber bushings aren't causing the most NVH? lol, don't lie to yourself.

I'll update later today

 

[Fleron2301]

Verify that your dogbone isn't touching/rubbing on the subframe. The 034 dogbone is thick and I've had that issue. Causes a lot of vibration.

 

[Injen1us]

but to think that these will have less NVH than polyurethane or that one mount (HPA 90A) is contributing most of the NVH whereas the 034 Billet Mounts are literally solid mounts with very little rubber bushings aren't causing the most NVH? lol, don't lie to yourself.

:clap::clap::clap:

 

[SKorea808]

Verify that your dogbone isn't touching/rubbing on the subframe. The 034 dogbone is thick and I've had that issue. Causes a lot of vibration.

Yeah I was worried about it prior to install so I kept double checking it until my car was down. I do intend to check it again at a future date just to be safe, even though that shit aint going no where. I also agree about the thickness, its MUCH bigger than any other dogbone on the market and kinda pissed I didn't take a picture of it side by side with the SPM dogbone.

:clap::clap::clap:

Also updated original post to reflect my previous mount setups so some of you won't keep confusing yourselves that the HPA was installed the same time as the 034 Billet Mounts. I've had 2 mount setups prior to my current setup.

I'll also be providing updated feedback in a couple of days (once I hit 500 miles) to give details on the NVH whether they got worse, better, or remained the same.

 

[HYDE161]

Thanks to this thread I made the decision recently to move over to the 034Motorsport mounts with my own review titled "HYDE16 Reviews - 034Motorsport Street Density Engine & Trans Mounts"

 

[SKorea808]

Thanks to this thread I made the decision recently to move over to the 034Motorsport mounts with my own review titled "HYDE16 Reviews - 034Motorsport Street Density Engine & Trans Mounts"

:thumbsup:

 

[kern417]

am i the only one that doesn't understand why 65A mounts are harsher than 75A. I have the bsh that's supposed to be 85A and i thought that it was the stiffest on the market.

 

[XGC75]

Geometry. You can put 3mm of 1B foam between two chunks of metal and it'll dampen less than a 1 cubig meter block of 60A durometer rubber with gaps. Frankly, hardness itself doesn't mean all that much.

 

[eurocars1]

Be careful about random bolts backing out. On my FSI, I have no balance shafts, solid mounts and a fluidampr, both bolts from the dogbone were loose and I lost one of the bolts to the charge pipe that bolts up near the crank pulley. I have since put loctite on everything to keep it in its place

 

[kern417]

Geometry. You can put 3mm of 1B foam between two chunks of metal and it'll dampen less than a 1 cubig meter block of 60A durometer rubber with gaps. Frankly, hardness itself doesn't mean all that much.

i don't see that working here. it's still a mount suspended in rubber that's attached to a base. the main difference i see is the pendulum arm being truly solid. but hardness would mean everything if you want to get closer to true solid mounts. seems like less material would allow flex more to be honest.

 

[XGC75]

In this case there are two pegs suspended each in their own cylinder by the 65A rubber. For the stock mount design, there's a single larger opening where the engine side of the mount is suspended by the 75A rubber (in the case of the track density mounts). So when you look at a force to angular displacement chart, for instance, the part with the large gap with 75A rubber can feasibly be displaced more per given force than the part with the small gap and 65A rubber. See what I mean?

 

[SKorea808]

1500 mile update, slight decrease in NVH (still very noticeable over polyurethane mounts) but still totally worth having if you have performance in mind!

 

[tsmack]

1500 mile update, slight decrease in NVH (still very noticeable over polyurethane mounts) but still totally worth having if you have performance in mind!

After 2000 miles, I had little to no reduction in NVH. Yesterday I installed a Unibrace UB. I was massively surprised at how it impacted NVH. The NVH is still present in reverse and at low rpms, but the NVH between 1000-2000 rpms has significantly decreased. It is so much better that the car is much more enjoyable to drive now in that rpm range. I was to the point I was down shifting often to keep rpms above 2000 but now I will let them drop to 1500 without feeling like I need to downshift. This makes driving around in town much better. There are other benefits from the UB, but I wanted to post about my experience as it relates to NVH with the engine and Trans mounts because the mounts have eliminated wheel hop and improved traction so much that I wanted to see if I could reduce the NVH before trying other mounts. I would highly recommend a UB paired with mounts, this car feels amazing and I still have the stock suspension!!