That would be a nice solution. The reduction ratio in
the gearbox is 4:1, the generator output shaft turns 4
times for every one turn of the tach cable.
--- "Hanna, Mark" <mhanna@ball.com> wrote:
> Hi Ron ,
> My car will have an alternator. I would like to use
> the stock Bugeye tach. I
> was thinking of driving the tach directly from a
> jack shaft attached to an
> appropriately sized pulley. Say 1/3rd the diameter
> of the main crank
> pulley. This way I would not need a gear box. Or do
> I have this backwards ,
> i.e. the tach has to turn 3 times as fast as the
> crank ? I haven't spent any
> time on the problem yet. I will be very interested
> in what you come up with
> .
> Mark Hanna
> AN5
>
> > -----Original Message-----
> > From: Ron Soave [SMTP:soavero@yahoo.com]
> > Sent: Wednesday, October 20, 1999 9:58 AM
> > To: spridgets@autox.team.net
> > Subject: Tach drive
> >
> > List,
> > I have been working with a machinist in town to
> try to
> > come up with gears to replace those in a generator
> > tach reduction gearbox (it a 4:1 ratio). What we
> are
> > trying to do is find spur gears from, say, Berg or
> > Boston Gear, that can be modified to work. Has
> anyone
> > done this research before?
> >
> > This was spurred by a failure of my gearbox. The
> box
> > is an aftermarket item from "a major LBC part
> > distrbutor" (begins with M, rhymes with "Toss")
> with
> > potmetal gears. Several teeth just kind of
> sheared
> > off, and the machinist said the quality of the
> metal
> > on the gears was "expletive deleted." The
> machinist
> > basically felt the entire box could be hand-made
> with
> > high quality for what the aftermarket places
> charge.
> > If this ends up being the case, you'll be the
> first to
> > know.
> >
> >
> > =====
> > Ron Soave
> > "You Are What You Remember"
> > 1960 Bugeye
> > 1972 BGT
>
=====
Ron Soave
"You Are What You Remember"
1960 Bugeye
1972 BGT
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