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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 01-05-2014, 02:48 PM   #21
GuidoK
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What's the purpose of this modified harmonic damper?
Will it be lighter?
Or customisable in size? or a split setup? (like the s54; a separate pulley and a separate damper so an alternative size pulley is easier made)
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Old 01-20-2014, 12:25 PM   #22
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Is this damper based on an early 5 rib ac pulley or the 2003 upgraded damper with 4 rib belt? What about am installation tool?


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Old 01-21-2014, 09:08 PM   #23
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BMW changed from part number 11231438995 to 11237513862 in 09/2002. I think the only difference is the earlier model used a 5 rib belt for the air conditioning compressor and changed it to a 4 rib belt.
It looks like people can and do run a 4 rib belt on the 5 rib compressor.

We should be able to stir up a couple installation tools and circulate them. I have a machine shop and other people on this list have made the tool. It shouldn't be a problem.
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Old 01-21-2014, 11:56 PM   #24
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I MAY be in on this, if anyone can explain the benefits of one on a purely Street car...
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Old 02-14-2014, 07:54 AM   #25
jolaine
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Anything new on this? I need a new harmonic damper on for my 330. The engine is out for some winter overhauling (its a cabrio) so that it will last for the next 200 000 km and I guess its a good idea to change this dampener. As a Honda enthusiast I've noticed that the M54 is quite rough when run closer to the redline and the redline is quite low. Maybe my dampener is not in good condition anymore after almost 200 000 km??

One of the reasons why I wanted to drop the engine is to check all things out, open the oil pan and check the oil pump nut. But I think that the nut going off is only the result of bad vibration that makes it come loose and the real reason (damper) needs to be fixed first. Then tighten the nut with some loctite and rev happily ever after.

If there is not any better solutions I'll just get a new OEM, but that will not fix the problem I guess.. *sigh* how hard can it be to get a good & working crankshaft wheel??
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Old 02-26-2014, 01:10 AM   #26
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I too am extremely interested in a upgraded damper. After selling a vehicle and still having a reliable DD I am gearing up to make the BMW more track ready as it sees less main road time and more garage queen status. Would like to get all the little things in order for track season so I can spend my weekends on the track with the boss instead of brown nosing it on the golf course(I suck at golf)
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Old 03-03-2014, 04:16 PM   #27
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I am interested.
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Old 03-08-2014, 11:31 AM   #28
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Followed this thread over here from M3F. I'm interested in this group buy, but was hoping these balancers were already shipping as I need one NOW. Have money waiting to be spent for this.

Researched pricing for ATI's damper and refuse to spend $859ish for one of these. Hence, my snooping brought me over here for this group buy. Too bad it looks stagnant...
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Old 03-09-2014, 11:47 PM   #29
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I think getting a lighter damper is a big mistake. It will just make the harmonic issue worse. Especially if you pair it with a lightweight flywheel.


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Old 04-26-2014, 12:11 AM   #30
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Hey everyone, new ZHP owner here. I really appreciate some of the information being shared here and I wanted to thank everyone for contributing.

I realize the Group Buy ended a long time ago and it sounds like ATI may no longer be making the harmonic damper any longer. Why then is the Super ATI Damper still listed on VAC's website:

http://store.vacmotorsports.com/harm...2-us-p756.aspx

Also, ~$1000 for essentially a tuned piece of rubber and pieces of aluminum seem extreme. I understand economies of scale, but at the same time, I can't seem to find any data to back up the claim that the ATI unit really does improve the durability of these motors at high RPMS. Can anyone lend some evidence now that some time has passed to accumulate more miles?_nr_
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Old 04-28-2014, 01:02 PM   #31
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Actually nothing has happened yet. I have been so busy with other projects, this one has sat dormant. I asked for permission, in case it is needed, to run this like a group buy and received no reply, either time. So I guess the next step is to send BHJ $200 and a sample to do the design work.

Are all of you still interested? If I there is enough interest I will pony up the $200 in hopes to recoup it by the time everyone has their new harmonic damper.
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Old 05-28-2014, 04:18 PM   #32
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I updated the link on my first post to their white paper which explains how and why... Click here

Other stuff from the BHJ Dynamics web site:

BHJ Dynamics offers specialty harmonic damper solutions for the performance automotive and marine aftermarket.

State of the art development technology and unexcelled craftsmanship make BHJ the ultimate choice for high performance, American made crankshaft harmonic dampers.

Engineering Services:
Custom Component Development Programs for specialized racing applications, vintage restoration and crate engine programs are also available in nearly unlimited configurations, whether S.F.I. certification is necessary or otherwise. Programs are available for a wide variety of budgets and production quantities. BHJ's state of the art damper design technology assures precise tuning for outstanding performance and long engine life in any operating environment. Contact us for more information on custom component development.

BHJ provides the ultimate performance harmonic damper solution for automotive, marine, aerospace and other specialty applications — all designed and crafted in the United States, from the finest materials available. Click here for an introduction to BHJ's crankshaft harmonic damper lineup, or click here to find out more about custom development services.
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Old 05-30-2014, 12:59 PM   #33
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Im interested in this. Curious as to why ATI is so much more if this is a comparable product...
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