Starter Tooth Sensor Question

[Programmer]

Kinda surprised nobody's mentioned all the available
tooth counts....148, 160, 162, etc...wouldn't this be
an added nightmare ?

Lyndon.

----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, December 12, 2001 2:00 PM
Subject: Re: Starter Tooth Sensor Question


>
> As small as the starter's gear is, it doesn't engage many teeth, making a
> signifigant change to one would be *iffy* in my opinion.
> Bruce
>
>
>
> From: "rr" <RRauscher at nni.com>
> Subject: Re: Starter Tooth Sensor Question
> > Why do I keep thinking that a tooth could be lowered enough
> > to skip the sensor and still work for the starter? Then use a
> > retriggerable SS to detect the missing tooth.
> > BobR.
>
> > bcroe at juno.com wrote:
> > > Yes, even if a tooth is a bit battered, it only represents
> > > a couple of degrees.  Battered or not, it will not be
> > > moving into the position of an adjacent tooth.  And the
> > > the shaft runout should be pretty small compared to
> > > tooth dimensions.
> > > A PIC ought to do it, if it can match the top RPM rate.
> > > But I won't be knocking a tooth off it, so something
> > > else will be needed for sync on the flywheel, and a
> > > second crude sync from the cam/distributor.
> > > The Hall devices I picked for experiments
> > > (MLX90217) claim to be self adjusting to things
> > > including gear wear, rise time of .4 microsecond,
> > > and 15KHZ bandwidth.  That sounds like they could
> > > do the job.  I understand the OEMs putting a nice
> > > missing tooth wheel in their engine, but those of
> > > us trying to upgrade 70s engines just have to make
> > > do with what we have.
> > >
> > > Bruce Roe
>
>

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