Lightened Flywheels

[jdbubb@ix.netcom.com (Dan Bubb)]

Wait a minute! Why would there be less engine braking?
The braking effect of the engine is not changed by lightening the
flywheel (since engine braking is a function of the engine trying to
pump air against a closed throttle) and the reduced inertia means the
engine revs will drop faster. As a matter of fact with the reduced
inertia there is less mass holding the engine revs up so the net effect
is slightly (very slightly) MORE engine braking.
Dan

Ken Bates wrote:
> 
> Oooohh,  That is a good pont.  I would not have thought of that.  This mod
> would be on my "list" the next time I do a clutch.    I am a "downshifter"
> when i am driving hard and this diminished effect would be missed.  Thank
> you for bringing that up.
> Ken
> '79 Scirocco 16v project "McFly"
> '86 16v (parts car)
> VORTEX:  "Indiana Red"
> 
> ----- Original Message -----
> From: "Robert Piwonka" <tpiwonka@TTACS.TTU.EDU>
> To: "Scirocco" <scirocco-l@scirocco.org>
> Sent: Monday, March 25, 2002 2:32 PM
> Subject: RE: Lightened Flywheels
> 
> > on stock cams I noticed no difference in idle characteristics when I had
> the
> > Velocity lightened flywheel.  However donwshifts have less effect ie. less
> > engine breaking and the car reved(sp) like a motorcycle ;)
> >
> > Robert Piwonka
> > 86 16V
> >
> > -----Original Message-----
> > From: scirocco-l-admin@scirocco.org
> > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of Allyn
> > Sent: Monday, March 25, 2002 2:18 PM
> > To: Euroroc II; Brian Wagner; Scirocco-l@scirocco.org
> > Subject: Re: Lightened Flywheels
> >
> >
> > Heavy - slower acceleration, smooth idle
> > Light - lumpy idle, at an extreme you may have to raise idle speed to
> > maintain idle without stall
> > Al
> >
> > ----- Original Message -----
> > From: "Euroroc II" <flaatr@yahoo.com>
> > To: "Brian Wagner" <scirocco_88_16v@hotmail.com>;
> <Scirocco-l@scirocco.org>
> > Sent: Monday, March 25, 2002 2:12 PM
> > Subject: Re: Lightened Flywheels
> >
> >
> > > So anyone want to clear up the pros and cons of lightening the fly
> wheel?
> > > I've got a good idea of the advantages and disadvantages but I'd like to
> > > get them confirmed.
> > >
> > > -Raffi
> > >
> > >
> > > At 12:07 PM 3/25/02 -0600, you wrote:
> > > >6 is extremely light, most of the lightened flywheels you buy are
> 8.3lbs
> > > >that might be a better bet.
> > > >
> > > >Brian
> > > >
> > > >
> > > >>From: "Sal Guzzo" <pellom@YorkU.CA>
> > > >>To: "Scirocco" <scirocco-l@scirocco.org>
> > > >>Subject: Lightened Flywheels
> > > >>Date: Mon, 25 Mar 2002 12:20:57 -0800
> > > >>
> > > >>Hi all,
> > > >>
> > > >>I wanna lighten my flywheel but I'm not sure how much to take off.
> It's
> > a
> > > >>210mm flywheel for an 8V.  I think that it weighs about 12 pounds now
> > and I
> > > >>was thinking of having it reduced to about 6 pounds.  Is that kewl?
> > > >>
> > > >>TIA
> > > >>
> > > >>Sal
> > > >>
> > > >>
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