Sorry, all. I tried to send this message last evening but for some reason, the
text
didn't go through. Strange.
Here's the posting again:
Are there diagrams available anywhere for WHERE to take off the "excess" cast
iron
from a stock '74 flywheel? All Kastner says in the Prep Manual is "the flywheel
can
be lightened by approximately four pounds by cutting away the material on the
engine side." So maybe its simply to remove the material (four pounds?) from the
heaviest section(s). Comments?
Dave Friedlander
CF25194UO
Ryan Miles wrote:
> List,
>
> Another thing that I always overlooked in this area is that the mass
>distribution and RADIUS of the flywheel. This is why the tilton clutches and
>small radius flywheels are the way to go for absolute horse power. My physics
>235 prof is a really interesting guy, he is into cars (he owns a Prowler, and
>several motorcycles, and he really wants a Viper), and I regularly stay after
>class to BS about cars. Anyway, I would be curious to know where they are
>removing the mass on these flywheels....The equation for rotational inertia
>is: some constant (depends on the distribution of mass) multiplied by the
>mass, multiplied by the radius squared. The radius makes a big difference, as
>does the mass distribution. As far as a wild guess, my physics professor
>guessed that a Tilton style clutch and (steel) flywheel weighing 7lbs, would
>be like having a stock style clutch and flywheel weighing half that much. This
>is why care should be taken to compare apples to apples; the performance o!
> f a racecar with a 6" flywheel that weighs 10lbs will be nothing like a
>street car with a stock clutch and a large aluminum flywheel.
>
> As I recall the shape of the factory flywheels, the early style wheel
>(TR250 and 69 TR6) has a large (~1" wide) ring of material around the very
>outer ring of the wheel, whereas the later wheel seems to have the mass
>concentrated more towards the center. I would be willing to wager that even if
>the early flywheel has less mass it probably has just as much rotational
>inertia.
>
> When It came down to decision time I opted for the late style crank, early
>style block and head, and an aluminum flywheel.
>
> isn't physics great :)
>
> Ryan Miles
>
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