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Does this conversion retain the BN1/2's mechanical clutch?
On 1/6/2019 1:01 PM, Curtis Arndt wrote:
> Regarding lightening flywheels on a BN2, the best solutions I've heard
> of comes from Bruce Phillips at "Healey Surgeons" in Maryland, and is
> something he did on his BN2 decades ago with great success.Â
> Substitute the stock 100 flywheel for one from a BJ8... This
> accomplishes several things, first, it greatly reduces the weight
> without having to compromise an original flywheel (plus it's an
> original Austin Healey part), and secondly allows the use of the
> superior BJ8 diaphragm clutch. Bruce and others who've tried this
> swear by the conversion.
>
> Supposedly, it does not work too well with a BN1 transmission since
> according to Bruce, the setup requires that the BN1 transmission bell
> housing be modified, i.e., material ground away for clearance? I have
> not been able confirm this, but fellow Concours member and performance
> expert John Hodgman told me he didn't think there would be a problem,
> and was investigating whether or not it could work on his BN1.
>
> Comments?
>
> Cheers,
>
> Curt
>
> On Sat, Jan 5, 2019 at 6:13 PM <glemon@neb.rr.com
>
> I had my flywheel lightened by a local machine shop. It was done
> in conjunction with an engine rebuild to M spec, so it was hard to
> evaluate the effect on performance. However I can say there were
> no I'll effects as far as idle or clutch/take off operation with
> the lightened flywheel.
>
> Greg Lemon
> Former BN1 owner
>
> wrote:
> > I have a lightened flywheel in my BN1 (26 pounds as opposed to
> 42) and I've used it for over 13 years with no known ill effects.
> The engine has been out for an unrelated failure and the crank
> checked out crack free. I use the car for highway cruising and
> around town and I don't spend much time above about 3200 RPM. I
> have Mike Lempert's 3.54:1 gears (hypoid final drive) and the 28%
> overdrive which gives an 80 MPH cruise at around that RPM. No land
> speed records, but no speeding tickets either...
> >
> > Bill Lawrence
> > BN1 #554
> > ________________________________
> > From: Healeys <healeys-bounces@autox.team.net
> > Sent: Friday, January 4, 2019 1:03 AM
> > To: Charlie Schott
> > Subject: Re: [Healeys] Lightweight Flywheel
> >
> > Read this first
> >
>
> http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/
> >
>
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<p>Does this conversion retain the BN1/2's mechanical clutch?</p>
<div class="moz-cite-prefix">On 1/6/2019 1:01 PM, Curtis Arndt
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJKrNeRnd5UjhPh1fG30hmOPopwfg-+wVKX-s_zxoRxAMNDJfg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Regarding lightening flywheels on a BN2, the bestÂ
solutions I've heard of comes from Bruce Phillips at "Healey
Surgeons" in Maryland, and is something he did on his BN2
decades ago with great success. Substitute the stock 100
flywheel for one from a BJ8... This accomplishes several things,
first, it greatly reduces the weight without having to
compromise an original flywheel (plus it's an original Austin
Healey part), and secondly allows the use of the superior BJ8
diaphragm clutch. Bruce and others who've tried this swear by
the conversion. Â
<div><br>
</div>
<div>Supposedly, it does not work too well with a BN1
transmission since according to Bruce, the setup requires that
the BN1 transmission bell housing be modified, i.e., material
ground away for clearance? I have not been able confirm this,
but fellow Concours member and performance expert John Hodgman
told me he didn't think there would be a problem, and was
investigating whether or not it could work on his BN1. </div>
<div><br>
</div>
<div>Comments?</div>
<div><br>
</div>
<div>Cheers,</div>
<div><br>
</div>
<div>Curt</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Sat, Jan 5, 2019 at 6:13 PM <<a
href="mailto:glemon@neb.rr.com";
moz-do-not-send="true">glemon@neb.rr.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I
had my flywheel lightened by a local machine shop. It was
done in conjunction with an engine rebuild to M spec, so it
was hard to evaluate the effect on performance. However I can
say there were no I'll effects as far as idle or clutch/take
off operation with the lightened flywheel.<br>
<br>
Greg Lemon<br>
Former BN1 owner<br>
<br>
---- WILLIAM B LAWRENCE <<a href="mailto:ynotink@msn.com";
target="_blank" moz-do-not-send="true">ynotink@msn.com</a>>
wrote: <br>
> I have a lightened flywheel in my BN1 (26 pounds as
opposed to 42) and I've used it for over 13 years with no
known ill effects. The engine has been out for an unrelated
failure and the crank checked out crack free. I use the car
for highway cruising and around town and I don't spend much
time above about 3200 RPM. I have Mike Lempert's 3.54:1 gears
(hypoid final drive) and the 28% overdrive which gives an 80
MPH cruise at around that RPM. No land speed records, but no
speeding tickets either...<br>
> <br>
> Bill Lawrence<br>
> BN1 #554<br>
> ________________________________<br>
> From: Healeys <<a
href="mailto:healeys-bounces@autox.team.net"; target="_blank"
moz-do-not-send="true">healeys-bounces@autox.team.net</a>>
on behalf of Michael Salter <<a
href="mailto:michael.salter@gmail.com"; target="_blank"
moz-do-not-send="true">michael.salter@gmail.com</a>><br>
> Sent: Friday, January 4, 2019 1:03 AM<br>
> To: Charlie Schott<br>
> Cc: <a href="mailto:healeys@autox.team.net";
target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a><br>
> Subject: Re: [Healeys] Lightweight Flywheel<br>
> <br>
> Read this first<br>
> <a
href="http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/";
rel="noreferrer" target="_blank"
moz-do-not-send="true">http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/</a><br>
> <br>
<br>
</blockquote>
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</blockquote>
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