What do you have to lose trying it? I might not put an expensive
dampener on it perhaps, just a decent one, but it's likely that your
crank is fine.
On Apr 9, 2009, at 3:50 AM, Robert Lang wrote:
> Hi,
>
> I installed a crank fan eliminator on my race car last year if for
> no other reason than it looked kool. It also dropped some weight,
> maybe 1 lb. And $30. :-) BTW - the guy that made this part is an
> awesome Triumph dude in Maine - Rick Patton. He's getting 200 HP to
> the wheels on a supercharged / injected TR6 motor with mostly stock
> internals!
>
> At any rate, I installed the eliminator and after a few events where
> the motor saw fairly big RPMs, the motor developed a rattle that you
> could only hear at idle. Along with FOT 19to1TR6, we determined that
> the harmonic damper had worked loose. I actually expected that to be
> the source of the noise, but I was more expecting the two damper
> rings to have seperated.
>
> The guy that made the parts looked at the part design and my
> installation and we determined that the back cut on the eliminator
> was not deep enough for my installation and this allowed the stock
> damper to wiggle a bit in the radial direction. Eventually, the
> crank key got worked over a bit and the slot in the dampener got
> egged out a bit.
>
> Here's the question: if a damper works loose, is it a given that the
> crank snout is damaged? I put a mic on the crank and I get uniform
> dimensions, but as of this moment I don't have another crank pulley
> to install to do some measuring. I'm teetering on the edge of
> picking up a fancy race dampener (I know all the advantages, I'm
> weighing a new dampener vs. being able to "afford" the trip to
> Nationals this year).
>
> So - the second question is - if the crank is knackered, is it a
> given that I'll wreck whatever dampener I install on that crank?
>
> I hope this is clear in description. I sort of think the answer is a
> no brainer (meaning that the crank is probably not optimal any more
> and that installing a new dampener is probably not the best
> solution), but I'm trying not to have to build a new bottom end on
> the motor at this time.
>
> Guidance, please?
> rml
> ---------------------------------------------------------------------------
> Bob Lang NER/SCCA | This space for rent
> Solo Chair 2008 TR6 40 F Prepared | Triumph!
> Voice:781-438-2568 FAX: 617-258-9535 | Cell: 339-927-4489
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