Aluminum flex disc (guibo)

[matreyia]

Sent you PM. Will check on it tonight. Hold tight.

Also if you or anyone wants or needs a 3.5 bar tmap sensor...used for 6 months, I am going to sell that for $60 also plus shipping of course.

And a mint condition N54 Dinan Carbon Fiber Intake set for the 335i (not 135) - $450 plus shipping. That thing goes for $1600 currently.

 

[The Convert]

Whatever is on the 335d is probably the best bet...assuming it fits.

 

[fmorelli]

Whatever is on the 335d is probably the best bet...assuming it fits.

Interestingly the 335d came with 26117605629 (the aluminum one) but realoem lists that as ended for all cars running that p/n (1M, etc). and the sell the regular rubber one now. Looks like the aluminum guibo was an inline upgrade on the 1M (and possibly other cars - 335is, 135is, 335d) then discontinued.

What I don't understand is that 26117605629 is listed as used on various cars that don't have them. My car is an 11/18/2010 production and realoem says it was put into use on 10/2010 and until 12/2015 ... yet my car has the regular rubber guibo. Kind of a mystery on this part ...

Filippo

 

[Erichale77]

The Function 7 would've been the nicest option IMO but they only have the M3 version listed. They think it works for non M cars but their wrong. E46 has 135mm dia and 335i etc has 105mm dia and both with 12mm bolts

 

[matreyia]

Interestingly the 335d came with 26117605629 (the aluminum one) but realoem lists that as ended for all cars running that p/n (1M, etc). and the sell the regular rubber one now. Looks like the aluminum guibo was an inline upgrade on the 1M (and possibly other cars - 335is, 135is, 335d) then discontinued.

What I don't understand is that 26117605629 is listed as used on various cars that don't have them. My car is an 11/18/2010 production and realoem says it was put into use on 10/2010 and until 12/2015 ... yet my car has the regular rubber guibo. Kind of a mystery on this part ...

Filippo

Whatever is "listed" on a car year/model should only be a general guideline. After recalls, special orders, or even change of ownership (modifications)...there is bound to be differences between listed and reality of each car. Also BMW makes most of their parts interchangeable with little to no modifications required. My car and many others have upgraded parts that were never ever listed as compatible. M3 suspension is just a small example. N20 Tmap sensor is another...and so on. This quibo topic is even more minor of an issue than those two just mentioned.

 

[frontside0815]

Trust me or not, but i saw a lot of Pictures of broken Aluminium ones! I have a few friends who work for BMW and one made most of the Pictures...
I will Change mine out for a rubber one...

But you can still buy Aluminium ones, your choice.

 

[matreyia]

Trust me or not, but i saw a lot of Pictures of broken Aluminium ones! I have a few friends who work for BMW and one made most of the Pictures...
I will Change mine out for a rubber one...

But you can still buy Aluminium ones, your choice.

I would be interested to know their power levels.

 

[fmorelli]

Trust me or not, but i saw a lot of Pictures of broken Aluminium ones! I have a few friends who work for BMW and one made most of the Pictures...
I will Change mine out for a rubber one...

But you can still buy Aluminium ones, your choice.

Thanks for the feedback. That's very interesting to know!

Filippo

 

[Itsbrokeagain]

I would be interested to know their power levels.

I would be inclined to believe that its not so much the power level that is destroying them, its the abuse guys are doing to them....burnouts, NLS everywhere 24/7 etc.

We had a guy back in the day with a 135 that was always breaking something. killing turbos, axles, diff mounts, you name it. At first we were like 'damn, this guy got a lemon, his stuff is always falling apart'. Then we watched him do a reverse burnout in front of the shop and trying to do a Rockford with the car, slamming it into first and launching the car off the rev limiter in a fury of tire smoke and banging gears.

We were appalled and his friend goes 'oh yea, he drives his car like that all the time.' Needless to say, we stopped working on his car.

 

[335i_lou]

Sent you PM. Will check on it tonight. Hold tight.

Also if you or anyone wants or needs a 3.5 bar tmap sensor...used for 6 months, I am going to sell that for $60 also plus shipping of course.

And a mint condition N54 Dinan Carbon Fiber Intake set for the 335i (not 135) - $450 plus shipping. That thing goes for $1600 currently.

Sent you a PM about the sensor

 

[matreyia]

I would be inclined to believe that its not so much the power level that is destroying them, its the abuse guys are doing to them....burnouts, NLS everywhere 24/7 etc.

We had a guy back in the day with a 135 that was always breaking something. killing turbos, axles, diff mounts, you name it. At first we were like 'damn, this guy got a lemon, his stuff is always falling apart'. Then we watched him do a reverse burnout in front of the shop and trying to do a Rockford with the car, slamming it into first and launching the car off the rev limiter in a fury of tire smoke and banging gears.

We were appalled and his friend goes 'oh yea, he drives his car like that all the time.' Needless to say, we stopped working on his car.

I wanted to know about the people breaking the aluminum guibo...which is empirically stronger than the rubber version. It is a fact that if you drive two cars like sane persons, same manner - the rubber guibo will definitely fail before the aluminum version. And if you drive two car like insane persons, the rubber guibo will tear before the aluminum version. There is no contest. Molecular and atomic structure of the aluminum surpasses the rubber by orders of magnitude. This is evidenced by the outnumbered cases of rubber guibos going south due to decay and tearing vs. negligible cases of the aluminum version failing. So that is why I asked the commenter about power levels or whatnot...who knows how they are making aluminum guibos explode...so I am totally interested. From my experience, the aluminum version provides superior reaction and minimizes delay of power transfer...you can feel a tiny difference in reaction when pressing the accelerator quick.

Now if you manage to land the car onto the guibo against a hard surface doing something stupid, then of course the rubber would survive more so due to pliability. And the aluminum would deform or break apart.

 

[NoQuarter]

"you can feel a tiny difference in reaction when pressing the accelerator quick."

Wut? I'm gonna say no you can't. This sounds like butt Dyno with ultimate precision.

 

[matreyia]

"you can feel a tiny difference in reaction when pressing the accelerator quick."

Wut? I'm gonna say no you can't. This sounds like butt Dyno with ultimate precision.

Of course it's butt Dyno. WTF?
When I installed the M3 Suspension it was butt dyno telling me that the car felt completely different than before.
When I installed the Rogue Engineering Transmission mounts, it was butt dyno telling me that the car accelerated a tiny bit better response to throttle input.
When I installed Dinan Stage 2, then Stage 3, then MHD...it was all butt dyno telling me something was a little different.

So I'm gonna say, that I did feel a slight difference - was that in my head? Could have been, sure...but spare me the absolute certainty statements. This is a personal experience and NOT a scientific test. I can tell you that the only issue that anyone could bring up is the nature of subjective experience. Some people are less sensitive to others. But if you hooked up those quibos in the same machine that tested those particular differences, you would notice a difference in measurement. The rubber guibo would certainly have more power loss due to the nature of rubber absorbing force vs. the stiffer metal quibo. That is a fact.

Whether or not you or I can feel the difference in the real world driving condition is another topic. But I did feel a tiny difference in acceleration response after changing out the guibo. You may not.

 

[fmorelli]

This is just opinion, but I suspect there is benefit from the aluminum flex disc. For starters, BMW would have never moved to this (and for the performance N54s of the time) if the benefit was not there. Testing would not have been done with a butt dyno . Whatever testing they did on the part during design/development obviously didn't yield sufficient information for real-world scenarios (whatever they may have been). We could all guess - cars making much more power than stock, "abuse", drivetrain deflection, et cetera. We can surmise the test rigs and protocols were not sufficiently reflective of real world circumstances.

But I don't doubt that the aluminum flex disc transmitted more power. BMW sold it at 150% the cost of the rubber part. A manufacturer doesn't design a part for a performance car, introduce in mid-production, charge a premium over the superceded part, for less performance. At least BMW doesn't.

At the end of the day, BMW decided (at this juncture) to just supercede the aluminum with rubber, and not further develop the aluminum guibo. It will be interesting to see if it returns in a more modern, high performance BMW drivetrain.

Filippo

 

[martymil]

What I found on other cars fitted with alloy guibos is as the drive line wears and develops more and more backlash the car
becomes annoying to drive but the benefit of metal is they last virtually the life of the car

Rubber is definitely weaker, easily tears as it becomes brittle and cracks over time.

Seen hundreds just fall apart over time.

Few huge advantages of rubber is much nicer to drive, takes shock load better, reduces vibrations, reduces backlash,
reduces wear and tear on the driveline from abuse or poor driving habits.

Pick your poison.

 

[matreyia]

What I found on other cars fitted with alloy guibos is as the drive line wears and develops more and more backlash the car
becomes annoying to drive but the benefit of metal is they last virtually the life of the car

Rubber is definitely weaker, easily tears as it becomes brittle and cracks over time.

Seen hundreds just fall apart over time.

Few huge advantages of rubber is much nicer to drive, takes shock load better, reduces vibrations, reduces backlash,
reduces wear and tear on the driveline from abuse or poor driving habits.

Pick your poison.

I agree exactly.

 

[fmorelli]

I have only had one guibo fail, and it was on a 2002 (model, not year). I'm sure they fail, but I've been good on about 20 or so BMW's, a bunch with over a dozen years and well over 100k miles.

I would not run these with polyurethane, but note the factory aluminum part came with rubber-sleeved bushings. I'm assuming that BMW engineers determined that NVH was sufficiently addressed with that design. What they did not account for was whatever was causing some of them to blow up.

Your last comment ... "reduces wear and tear on the driveline from abuse or poor driving habits" ... I bet the all rubber guibo does that best - you're probably spot on.

Filippo

 

[martymil]

The alloy guibo doesn't fail because of the design, its more likely from the backlash and the constant knocking when on and of the throttle as the car drive line wears and eventually it will cause stress fractures and failure.

I'm using the alloy one but my car only has 24k on it so no issues, as the car will eventually develop backlash as all cars do I'll be swapping over to the rubber version.

 

[fmorelli]

So are you suggesting that the rubber sleeves that BMW used do not provide enough isolation to changes in driveline load, and that ultimately cracks the cast aluminum? If so, the theory would be that the rubber sleeve bushings are sufficient for driver comfort NVH, but the cast aluminum is not sufficient to deal with driveline behaviors?

Filippo

 

[martymil]

I'm suggesting the bushes in the alloy guibo don't provide enough isolation when the drive line starts to wear and you
start to develop backlash in the gearbox, driveshafts and differential.

I've seen a 1m in the shop with at least 10mm of backlash and that was horrible.

The only economical fix was to put a rubber guibo into it which will dampen the issue
but not resolve it.

When the car is new, no issue.

When I mean failure of rubber guibos it doesn't mean total failure, when they develop cracks in the rubber
it means failure too