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Old 05-08-2019, 09:09 AM   #1
r-mm
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RHD light flywheel - review and question re noise when starting

Just got my car running after major motor & trans re-seal - all stock with the RHD 7.5lb flywheel. http://racehead.com.au/products-page...ng-flywheel-2/

The flywheel and its seller are a class act and I so far am finding no down sides. I will note that I am a Grown Ass Man who drives my 100% stock E30 sedan daily and have a very low tolerance for Because Racecar stuff (aka chatter, searching idle etc).

The one annoyance is that it makes a ugly sound when the starter engages and disengages, like a car with a sticky pinion. One guess is this is because of the design with the ring gear being less supported and more likely to "clang" and or flex than the stock boat anchor. I did not lubricate the starter nor new flywheel ring gear. I am using a new stock Sachs clutch.

Anyone experience same? If this is unavoidable I'm still a fan. If it sounds unusual I will I play with shims / dry lubrication?

Starter is stock and cranks like a dream.
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Old 05-08-2019, 09:11 AM   #2
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I've had a similar issue, when someone left out the shim between the flywheel and transmission. Additionally, if you tighten all the other bell housing bolts, before tightening the starter bolts, it'll do the same thing.
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Old 05-08-2019, 09:47 AM   #3
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Good call will try slacking bellhousing and ring gear, tightening together.

By shim you mean one of attached (arrows)?
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Old 05-08-2019, 10:22 AM   #4
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I'm referring to the outer, large, sheet metal shim, correct.
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Old 05-08-2019, 10:52 AM   #5
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Well I got that shim at least

I will try to slack and retighten the bellhousing/starter. I don't see any starter to bellhousing shims listed but then I suppose that presumed the factory flywheel.

I also have this question in to RHD.
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Old 05-08-2019, 11:33 AM   #6
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Be careful with this issue, the ring gear on the RHD FW is not hardened. Frank who works with me in the shop (fporro here on r3v) had a similar issue and the starter ate the rings gears right off the flywheel after starting the car for 2 weeks in his daily.



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I've had a similar issue, when someone left out the shim between the flywheel and transmission. Additionally, if you tighten all the other bell housing bolts, before tightening the starter bolts, it'll do the same thing.



Not quite sure what's meant by this. If you can't tighten the bell housing bolts before the starter, then you would have to loosen the bell housing every time a starter is changed?
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Old 05-08-2019, 11:44 AM   #7
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edit - I didn't see which order you were quoting.

I would like to learn more about the starter eating the ring gear in Frank's car please. Was the root cause determined to be poor alignment/engagement of the two? Surely normal wear on even an unhardened ring gear would never lead to such quick wear?
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Old 05-08-2019, 03:41 PM   #8
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Hey r-mm, ForceFirebird is correct. My starter was a bit loose, the sound warned me but I ignored it, so within 2 weeks made a flat spot on flywheel until did not catch anymore.

Not the flywheel fault but my negligence. I order a replacement unit.

Besides rattling at idle it worked flawlessly for a long while.
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Old 05-08-2019, 03:52 PM   #9
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Thanks very much for clarifying that. I will keep a close ear for the sound. I believe it is already getting a little bit better. maybe the sharpest machining marks on the fly wheel got knocked off during the first 10 or so starts. Anyway I am relieved to know that you did not identify a bigger flaw with the unit thanks for sharing your experience
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Old 05-09-2019, 07:41 AM   #10
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RHD has his flywheels made in Taiwan which typically has good QC. Beyond that Rama is not one to cut corners on anything with his name on it. I installed mine when I did the 5spd swap and am loving it with zero issues....except that now I want more Hp
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Old 05-09-2019, 02:25 PM   #11
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RHD has his flywheels made in Taiwan which typically has good QC. Beyond that Rama is not one to cut corners on anything with his name on it. I installed mine when I did the 5spd swap and am loving it with zero issues....except that now I want more Hp
Does it rattle at idle on a hot day or when tranny fluid is uber hot ? Any other noises?
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Old 05-09-2019, 03:39 PM   #12
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Does it rattle at idle on a hot day or when tranny fluid is uber hot ? Any other noises?
I have a bit of getrag rattle that I don't even notice any more and It never changes regardless of weather or how I drive.
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Old 05-09-2019, 04:29 PM   #13
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I have a bit of getrag rattle that I don't even notice any more and It never changes regardless of weather or how I drive.

You'll hear it @ local drive through, regardless of weather.

You'll also feel the need to engage first gear at a bit higher rpm.
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Old 05-10-2019, 07:58 AM   #14
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After a 200 mi drive I feel like im hearing what I would describe as a whistle from an hvac blower. Wonder if the ‘open’ design makes some sort of low whistling sound.

I have had the car stall at cold idle a few times and am looking forward to installing my squid chip this wknd which raises idle some.
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Old 05-10-2019, 08:36 PM   #15
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I just installed the same flywheel in my 325i. I have the exact same noise when starting. I also know someone local to me who is experiencing the same thing. I have an email into RHD as well.

It's like the starter is binding on the flywheel when I start. It's awful.


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