> I see someone Ebay is selling a replacement crank
> dampener made out of billet aluminum. Of course it would not
> have the 2 pieces connected by rubber. I'm wondering what
> kind of problems this would create? We take weight off the
> flywheel, why not the the other end of the crank? Thanks, John Mitchell
> 76 TR6
DON'T DO IT!
Just another dumb billet part brought to you by an idiot on eBay.
Sir Henry Royce realized over 100 years ago that solid crankshaft pulleys
have a detrimental impact on engine performance and durability. There is no
reason to go backwards because some fool thinks saving a few founds at the
front of the crankshaft will yield a performance improvement (it won't!).
I'll simply quote David Vizard for those non-believers... and if you don't
believe me, or Vizard, go ahead run one of these ill-conceived solid
aluminum crankshaft hubs. I'm not stopping you, you'll learn...
"Having a damper that really cracks down on torsional vibrations not only
significantly extends crank life, but also adds power.
At first it may seem an unlikely piece of go faster equipment, but an
effective crank damper cuts the amount of torsional vibration transmitted to
the camshaft. In so doing it allows the cam to much more nearly deliver the
intended lift/duration characteristics to the valvetrain. Forget light when
it comes to dampers. Even for a drag racer, where acceleration is all that
matters, a functional damper will out perform a light, non-functional one
every time.
So how much power can a damper be worth? Forget about hearsay and some of
the opinions of even well-known racers. Testing on my own dyno on a
nominally 400hp motor showed a good damper was worth 5 hp over a typical
factory damper (which was designed for the stock bottom end not a modified
one) and over 11 hp over that delivered by a lightweight hub."
- David Vizard, Popular Hot Rodding Article
(Mr. Vizard writes mostly on American V8s these days, but much of the
underlying theory in his V8 focused articles is still totally applicable to
any engine)
Kai
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Kai M. Radicke
Wishbone Classics
* British Car Parts *
www.wbclassics.com
Ph: 215.945.7250
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