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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 10-16-2012, 11:49 AM   #881
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I'm going to buy Anthony's and then break it. In fact, I'm going to buy them all and break them all so no one can have an ATI damper...
heheh

not mine
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Old 10-16-2012, 12:47 PM   #882
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heheh

not mine
I want it!
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Old 10-17-2012, 12:04 AM   #883
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I'm going to buy Anthony's and then break it. In fact, I'm going to buy them all and break them all so no one can have an ATI damper...
nooooo
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Old 01-17-2013, 05:55 PM   #884
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Anyone looking for one?
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Old 01-17-2013, 06:19 PM   #885
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I am glad I saw this thread but I remember someone on here that got their nut loose even after the ATI Damper install and the custom oil sump pump from that one member.

does anyone else remember this or am I crazy?
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Old 01-17-2013, 06:30 PM   #886
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It can still happen if you rev the motor too high.
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Old 01-17-2013, 10:16 PM   #887
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Anyone looking for one?
I am interested.
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Old 01-19-2013, 08:47 AM   #888
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I am glad I saw this thread but I remember someone on here that got their nut loose even after the ATI Damper install and the custom oil sump pump from that one member.

does anyone else remember this or am I crazy?
Was it me? I had the ATI damper and lost the oil pump nut. Don't think that this damper solves your problems although it helps.
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Old 01-19-2013, 09:29 AM   #889
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Was it me? I had the ATI damper and lost the oil pump nut. Don't think that this damper solves your problems although it helps.
I dont remember but I was really shocked when I saw the post. did you also hav Greg's special customized oil pump assembly installed
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Old 01-19-2013, 09:41 AM   #890
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Was it me? I had the ATI damper and lost the oil pump nut. Don't think that this damper solves your problems although it helps.
Do you have your redline raised? If so, to what RPM?
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Old 01-19-2013, 09:57 AM   #891
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I dont remember but I was really shocked when I saw the post. did you also hav Greg's special customized oil pump assembly installed
this is really bugging me. I think I saw the post as part of someone engine build. the failure was posted with pix but it was just a one liner. my memory might be off but I think what made this failure stood out was that the person had the Ati Damper + Greg pump. Again, I can be wrong and probably just confusing VAC pump failure from Pei330 build.

i spent 30 mins looking for that thread. I knew I should have bookmarked it
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Old 01-19-2013, 08:58 PM   #892
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I dont remember but I was really shocked when I saw the post. did you also hav Greg's special customized oil pump assembly installed
No.

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Do you have your redline raised? If so, to what RPM?
7000 rpm. Didn't spend a lot of time there.

There is an inherent issue with the engine that CANNOT be solved unless you rebuild the engine. The oil pump, damper, S54 tensioner, zip ties, and duct tape are all band aids. They help but the problem is still there. If that keeps you up at night, sell the car.
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Old 01-19-2013, 09:47 PM   #893
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No.



7000 rpm. Didn't spend a lot of time there.

There is an inherent issue with the engine that CANNOT be solved unless you rebuild the engine. The oil pump, damper, S54 tensioner, zip ties, and duct tape are all band aids. They help but the problem is still there. If that keeps you up at night, sell the car.
So would the BMW Motorsport pump solve all opn issues if it was more affordable and a new spaced oil pan was made
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Old 01-19-2013, 11:51 PM   #894
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So would the BMW Motorsport pump solve all opn issues if it was more affordable and a new spaced oil pan was made
Don't think so. A couple of sources agree that the harmonic issue is inherent to the rotating assembly. So bolting stuff on doesn't fix that. The best solution is to carefully balance and match the rotating assembly with lightweight components (pistons and rods) to minimize harmonic issues. Then add the 4 bolt pump as insurance.

The damper and aftermarket flywheels? Haven't really gotten to that part yet.

Realistically, only those cars seeing extreme service demands should really need to deal with this issue sooner than later. Street driven cars (even ones driven aggressively) don't see the sustained loading and unloading that a track driven cars see. I think my s/c'd 330 may be one of the most abused engines on this forum because it sees a lot of track use so I need to address this. Most, I wouldn't bother.

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Old 01-20-2013, 12:38 AM   #895
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Don't think so. A couple of sources agree that the harmonic issue is inherent to the rotating assembly. So bolting stuff on doesn't fix that. The best solution is to carefully balance and match the rotating assembly with lightweight components (pistons and rods) to minimize harmonic issues. Then add the 4 bolt pump as insurance.

The damper and aftermarket flywheels? Haven't really gotten to that part yet.

Realistically, only those cars seeing extreme service demands should really need to deal with this issue sooner than later. Street driven cars (even ones driven aggressively) don't see the sustained loading and unloading that a track driven cars see. I think my s/c'd 330 may be one of the most abused engines on this forum because it sees a lot of track use so I need to address this. Most, I wouldn't bother.
thanks
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Old 01-20-2013, 08:36 AM   #896
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I think a lot of it has to do with the aluminum block. It is not as stiff as the S series iron blocks so is more likely to propagate harmonics.

One of the worst things you can do is bang the motor off the rev limiter. Ours is set to 6900 and we do hit it but we try not to ride it.

Retaining the stock flywheel and adding a damper are two things that will mitigate the harmonic problems but they aren't a 100% solution.
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Old 01-20-2013, 08:49 AM   #897
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really thinking about putting in a lwfw for the performance benefits but dont plan on sitting high for very long either
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Old 01-20-2013, 11:16 AM   #898
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I think a lot of it has to do with the aluminum block. It is not as stiff as the S series iron blocks so is more likely to propagate harmonics.

One of the worst things you can do is bang the motor off the rev limiter. Ours is set to 6900 and we do hit it but we try not to ride it.

Retaining the stock flywheel and adding a damper are two things that will mitigate the harmonic problems but they aren't a 100% solution.
S52 was an iron block and plenty of them have the OPN issue. Same crank as the M54B30. I don't think aluminum is the problem.
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Old 01-21-2013, 11:28 PM   #899
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S52 was an iron block and plenty of them have the OPN issue. Same crank as the M54B30. I don't think aluminum is the problem.
Dry slump FTW
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Old 01-22-2013, 05:58 AM   #900
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S52 was an iron block and plenty of them have the OPN issue. Same crank as the M54B30. I don't think aluminum is the problem.
They have OPN issues when people over-rev them.
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