Re: SV: aluminum - steel flywheels (was Re: Fw: Flywheel)

[shoupr@xxxxxxxxx]

Years ago I drag raced a 67 GTX (Bought cheap with a blown up 440) and replaced with a 340 that I had that was built up. To launch tha heavy car I needed a heavier (steel) flywheel. I eventually put the drive train in a 70 Cuda and changed to the aluminum flywheel for quicker revs. Launch was not a problem with the lighter car.

Dick Shoup


--- On Fri, 3/20/09, Knud-Erik Holm <kebh@xxxxx> wrote:

> From: Knud-Erik Holm <kebh@xxxxx>
> Subject: SV: aluminum - steel flywheels (was Re: Fw: Flywheel)
> To: 1962to1965mopars@xxxxxxxxxx
> Date: Friday, March 20, 2009, 12:28 PM
> I see your point, the idea of getting a alu flywheel is not
> because of a
> performance gain. It is simply the only readily flywheel I
> can get my hands
> on for a decent price. But if it has downsides then it is
> kind of stupid to
> purchase it. I just don´t know! This is my first American
> car. I have no
> experience with this. Only European cars.
> 
> To confuse matters further, I have just taken my 360 apart.
> It looks really
> nice inside. But I will have to messure all the parts
> before I will make any
> decisions. Anyway the crankshaft has number 3418640-2 and
> in one of my books
> it is said to be a cast shaft. In another book it is said
> that the 360 were
> made with a forged crank that are internally balanced. The
> difference is the
> counterweights. Forged is rounded and cast is
> sharpcornered. It looks like
> mine are round cornered. And the counterweights are drilled
> with holes some
> large at the end of the crank. And smaller ones at the
> other weights.
> 
> Please help me someone?
> 
> Knud-erik Bergstein Holm
> 
> -----Oprindelig meddelelse-----
> Fra: Gary H. [mailto:spigot2039@xxxxxxxxxxx] 
> Sendt: 20. marts 2009 13:30
> Til: 1962to1965mopars@xxxxxxxxxx
> Emne: aluminum - steel flywheels (was Re: Fw: Flywheel)
> 
> 
> I believe the aluminum flywheels are favored by the circle
> / dirt track
> racers as for fast rpm increase heading out of the corners.
> Mopar engines
> put out good torque by design so don't mind the steel
> flywheel on street or
> drag use.
> 
> Thanks,
> Gary H. 
> 
> -----Original Message-----
> >> This brings up a question I have had and may help
> Knud in his decision. I
> 
> >> know aluminum flywheels being lighter , will
> overcome inertia quicker 
> >> therefor gaining RPM faster. In a big block B body
>  with about 3:50 rear 
> >> end ratio - 4 speed-5500-6000 RPM limit - about
> 375-400 Horse -any 
> >> advantages or disadvantages to running an aluminum
> flywheel. Driven
> street 
> >> and every so often on the strip? My thoughts: a
> 413 has enough torque to 
> >> get you off the start line  ( or from a stop sign)
> without the inertia of
> 
> >> a steel flywheel. The aluminum flywheel would wind
> up quicker, Any 
> >> experience out there with the aluminum 
> >> flywheels?...................MO.......ew  iowa
> 
> 
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> 
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