[M-335]

Anyone use one of these yet? https://store.vacmotorsports.com/mob...n54-p3758.aspx

[Julian2485]

Originally Posted by BMW M335

Anyone use one of these yet? https://store.vacmotorsports.com/mob...n54-p3758.aspx

Will it help get rid of flywheel chatter from my motiv twin clutch kit ?

[JTswole83]

JC, its expensive!

[JTswole83]

Originally Posted by Julian2485

Will it help get rid of flywheel chatter from my motiv twin clutch kit ?

It'll help keep your motor together, by lessening the harmonics and vibration

[M-335]

I posted this because some of the complaints that have been floating around & believe this might solve some issues. Might be a great thing to have if you are trying to rev higher & Definitely will help with light weight flywheels & dual clutch setups.

I think if we can spark an interest maybe Vac will do a group buy & bring the price down a bit.

[TrollToll]

For those who don't know what a harmonic balancer does, here's a description:


http://www.dieselarmy.com/engine-tec...nic-balancers/

[M-335]

Originally Posted by Yournamehere90

For those who don't know what a harmonic balancer does, here's a description:


http://www.dieselarmy.com/engine-tec...nic-balancers/

Great article

[ucsbwsr]

Too bad they don't give any REAL technical information on it, they just state that it will work ...but how? What is the weight? Works just as well on N52s as it does N54s? Autos the same as Manuals?

On RealOEM harmonic balancers for the N52 and N54 range between 4.6lbs and 8.6lbs. Interesting how VAC can make a "one size fits all" balancer that performs so well. Not saying it isn't possible but if there was a solution that fit all N5X engines and performed well you think BMW would save the money on developing so many different variants.

Evan

[hassmaschine]

Originally Posted by ucsbwsr

Too bad they don't give any REAL technical information on it, they just state that it will work ...but how? What is the weight? Works just as well on N52s as it does N54s? Autos the same as Manuals?

On RealOEM harmonic balancers for the N52 and N54 range between 4.6lbs and 8.6lbs. Interesting how VAC can make a "one size fits all" balancer that performs so well. Not saying it isn't possible but if there was a solution that fit all N5X engines and performed well you think BMW would save the money on developing so many different variants.

Evan

Did you read the linked article? If you did, it would answer all of the questions you just posted.

FWIW, yes, it does fit and work on the N52 as well as the N54. I believe Pete has one on his 328i race car, although he hasn't driven it yet.

[Julian2485]

I would get it for the simple fact it would of gotten rid of the chatter from a lightweight flywheel lol

[M-335]

Will definitely be going on my car when I'm done with my build.

[ucsbwsr]

Originally Posted by hassmaschine

Did you read the linked article? If you did, it would answer all of the questions you just posted.

I must have overlooked where the article mentioned the weight of the VAC BMW N5X harmonic balancer.

"VAC exclusive dampers" doesn't offer much insight.

[hassmaschine]

Again, if you read the article, it makes the point pretty clearly. It is how a viscous fluid damper functions that is important - the weight of the stock elastomer damper is irrelevant. The entire point is the viscous fluid damper works at a wide range of frequencies, where an elastomer is tuned to a narrow band specific to an engine.

[Torgus]

Originally Posted by Julian2485

I would get it for the simple fact it would of gotten rid of the chatter from a lightweight flywheel lol

Just raise your idle? I have zero chatter now after raising it.

Looks like an expensive paperweight.

[M-335]

Originally Posted by Torgus

Just raise your idle? I have zero chatter now after raising it.

Looks like an expensive paperweight.

Raising the idle will improve harmonics/vibrations at 6000+rpms?

I don't believe you understand the full point of what we're talking about & how a balancer works.

This wasn't a thread about how to help clutch chatter.

[Torgus]

Originally Posted by BMW M335

Raising the idle will improve harmonics/vibrations at 6000+rpms?

I don't believe you understand the full point of what we're talking about & how a balancer works.

This wasn't a thread about how to help clutch chatter.

Why do you think this product is needed on this platform?

[M-335]

Originally Posted by Torgus

Why do you think this product is needed on this platform?

Do a little bit of searching around especially in regards to newer F82 cars.

I never said it was needed & 90% of people with N54s might not ever see the point to where this is needed but for those pushing the envelope especially in the higher rpms "it may be needed"

You should read the whole article that was posted. Almost all serious cars use this type or similar balancer.

These dampers have been around for decades & for a reason.

[Torgus]

Originally Posted by BMW M335

Do a little bit of searching around especially in regards to newer F82 cars.

I never said it was needed & 90% of people with N54s might not ever see the point to where this is needed but for those pushing the envelope especially in the higher rpms "it may be needed"

You should read the whole article that was posted. Almost all serious cars use this type or similar balancer.

These dampers have been around for decades & for a reason.

I'm very familiar with with the harmonic balancers and why people use them. I just have yet to hear of an issue that made me think these are needed on the n54. It's not like these engines rev high, max limit is 8k via the stock dme a whole 800rpms more.

I assume you are talking about the crank hub issue? That is specific to the S55. BMW should have keyed it correctly from the factory. BMW is ignoring the issue. I have yet to hear a dampener fixed the issue. Can you link me to it?

Like I said this looks like an expensive paperweight. I don't see Motiv recommending them on their engine build and they actually race their car.

[M-335]

Originally Posted by Torgus

I'm very familiar with with the harmonic balancers and why people use them. I just have yet to hear of an issue that made me think these are needed on the n54. It's not like these engines rev high, max limit is 8k via the stock dme a whole 800rpms more.

I assume you are talking about the crank hub issue? That is specific to the S55. BMW should have keyed it correctly from the factory. BMW is ignoring the issue. I have yet to hear a dampener fixed the issue. Can you link me to it?


Like I said this looks like an expensive paperweight. I don't see Motiv recommending them on their engine build and they actually race their car.

Most people break their motor an assume it was do to making to much power but maybe that's not the case.

You'll be hard pressed to find any dyno charts exceeding 7300rpm let alone 8000 rpm.

All the Motiv charts I've viewed are well under 7500 rpms as well.
http://www.e90post.com/forums/showthread.php?t=1307143

[Torgus]

Originally Posted by BMW M335

Most people break their motor an assume it was do to making to much power but maybe that's not the case.

You'll be hard pressed to find any dyno charts exceeding 7300rpm let alone 8000 rpm.

All the Motiv charts I've viewed are well under 7500 rpms as well.
http://www.e90post.com/forums/showthread.php?t=1307143

Well go buy it and install it if you think it is useful. Just seems like a good way to throw away some $$$ but that is me.

[M-335]

Originally Posted by Torgus

Well go buy it and install it if you think it is useful. Just seems like a good way to throw away some $$$ but that is me.

I am buying 1 for my spare engine & most think that car insurance is a big waste of money into someone steals their car.

[Torgus]

Originally Posted by BMW M335

Right, most think that car insurance is a big waste of money into someone steals their car.

Ok, so you are going to buy this dampener?