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Vendor & GroupBuy items for sale VW TDI/Diesel related items for sale by vendors and Groupbuys. The only commercial posts to these forums are that of Vendors with TDI related equipment. To start a post, you must be a Registered Vendor. You may periodically post a note about products you may have for sale/services so long you indicate clearly you are from the company selling these products/services. The right to discontinue this practice & remove excessive posts remains with the operators of TDIClub. Please note there is also a webpage of TDI Vendors" Group-buys are permited if sponsored by a registered vendor.

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Old February 7th, 2014, 15:18   #61
struikie
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can't say it's a huge difference...
might be a bit smoother but not significantly unfortunately...

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Old February 7th, 2014, 19:29   #62
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So not worth the expense then?
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Old February 8th, 2014, 03:09   #63
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perhaps for the SMF guys it's a good thing...
for the DMF it's not THAT much of a benefit...

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Old February 9th, 2014, 10:21   #64
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Quote:
Originally Posted by struikie View Post
perhaps for the SMF guys it's a good thing...
for the DMF it's not THAT much of a benefit...

JW
Thanks for the feedback in any case.
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Old February 9th, 2014, 11:15   #65
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It should be better for the crank and bearings at high rev's and high loads. Even then torsional vibes are not apparent to the operator, whether they are bad or not.

One trick I found for the big marine diesels is if damper is doing something, it gets warm. So shoot it with an IR gun and if it is way above ambient (hard to quantify, I know), it's doing some damping.
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Old February 9th, 2014, 11:36   #66
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Well it's going to conduct heat from the block. Getting a baseline from the stock damper would be advisable in that case.
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Old February 9th, 2014, 14:06   #67
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It was mentioned earlier that when running BFI mounts the amount of vibrations were reduced. I would think if they felt a reduction its doing its job.
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Old February 18th, 2014, 09:27   #68
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Quote:
Originally Posted by Ski in NC View Post
It should be better for the crank and bearings at high rev's and high loads. Even then torsional vibes are not apparent to the operator, whether they are bad or not.

One trick I found for the big marine diesels is if damper is doing something, it gets warm. So shoot it with an IR gun and if it is way above ambient (hard to quantify, I know), it's doing some damping.
Good advice
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Old February 19th, 2014, 10:49   #69
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I just had idle raised to just shy of 900rpms.. That helped a lot with stiffer mounts.. Eventually I may try throwing on my damper from the ve on the CR just to try it out.
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Old February 19th, 2014, 18:53   #70
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Shorty does your CR car have excess vibration at idle with mounts??
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Old February 19th, 2014, 19:29   #71
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depends on what mounts, and what you define as excess.. right now not really that much in excess only under extremely low load. Raising the idle did get rid of the clutch ball bearing rattle in the smf.
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Old February 19th, 2014, 20:26   #72
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I didn't think it was the ball bearings rattling but the gears themselves, right?

I have the regular heavy 22 lb SMF and VR6 clutch and the rattle is very little, even at 820 idle (I've since went to 840 idle) on a VE ALH.

Other people on ecuconnections have found lower than stock idle speed as smoother, but with stock mounts. The bad spot is 950-1100 or so... probably some resonation?
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Old February 20th, 2014, 06:11   #73
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we bumped my idle up to right at 1,000rpm and with the delrin VF bushings and the solid lower mount it is fantastic! really smooth
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Old February 20th, 2014, 06:35   #74
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You will not "feel" torsional vibrations at the seat-of-the-pants. Reducing TV, while always a good thing, is not anything that you will notice subjectively. It's not a vibration like the second-order forces characteristic of an inline 4-cylinder engine that you can definitely influence by engine mounts or internal engine design measures (reducing reciprocating mass and/or altering the L/R ratio). You will know that TV is a problem by broken crankshafts.
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Old February 20th, 2014, 14:16   #75
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TDIMEISTER,
Does the mass of the flywheel and balancer help reduce TV? Would having a heavier flywheel (or keeping the DMF) help reduce TV?

It's just interesting how the frequency is out of the range of feel, which makes sense... like how an opera singer can shatter a glass with their voice, but not be loud enough to deafen people around.

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You will not "feel" torsional vibrations at the seat-of-the-pants. Reducing TV, while always a good thing, is not anything that you will notice subjectively. It's not a vibration like the second-order forces characteristic of an inline 4-cylinder engine that you can definitely influence by engine mounts or internal engine design measures (reducing reciprocating mass and/or altering the L/R ratio). You will know that TV is a problem by broken crankshafts.
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