[Healeys] Lightweight Flywheel

Sat Jan 5 15:16:43 MST 2019

With regard to the weight of the flywheel in the 100 I doubt that a lot of design went into optimization of that detail at the time the flywheel was specified. Remember the origins of  that engine which was a truncated version of the 6 cylinder Austin lorry engine. It was originally supposed to be used as a wartime replacement for worn out engines in Willys Jeeps should such become necessary. The war ended before such replacement was needed and so Austin ended up with a surplus of these engines in search of a purpose. Under those circumstances I would guess that the flywheel used on these engines was carried over from the Austin 4 liter lorry engine.

If that is the case then there would be a lot of excess steel that can be safely shed for a smaller engine in a light weight vehicle such as an Austin Healey.

Bill Lawrence
BN1 #554
________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of John Rowe <john at jtkarowe.com.au>
Sent: Saturday, January 5, 2019 8:55 AM
To: 'Charles Schott'; michaelsalter at gmail.com
Cc: healeys at autox.team.net
Subject: Re: [Healeys] Lightweight Flywheel

I put a flywheel of the early 6 cylinder on my 100- probably about half the weight of the original.

Motor was a little more than M-spec with flat top pistons.

Made it more lively boy no difference in tractability.

I must admit I never revved it hard, there being no need to.

A good mod in my opinion

John Rowe

Qld Australia

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Charles Schott
Sent: Saturday, 5 January 2019 12:45 AM
To: michaelsalter at gmail.com
Cc: healeys at autox.team.net
Subject: Re: [Healeys] Lightweight Flywheel

Michael,

Thanks for the informative article. What is the affect of a lighter flywheel on the performance of the engine, especially in every day driving?

Regards,

Charlie

________________________________

From: "Michael Salter" <michael.salter at gmail.com>
To: "Charlie Schott" <schottc at knology.net>
Cc: healeys at autox.team.net
Sent: Thursday, January 3, 2019 7:03:22 PM
Subject: Re: [Healeys] Lightweight Flywheel

Read this first

http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/

On Thu, Jan 3, 2019, 7:42 PM Charles Schott <schottc at knology.net<mailto:schottc at knology.net> wrote:

Has anyone used a lightweight flywheel on their 100 BN1? I plan on going with a complete Le Mans kit and a lightweight flywheel and the car will be for street use. If you have, what are your thoughts on it? Thanks.

Regards,

Charlie Schott

________________________________

From: "Michael Salter" <michael.salter at gmail.com<mailto:michael.salter at gmail.com>>
To: "Bob Spidell" <bspidell at comcast.net<mailto:bspidell at comcast.net>>
Cc: healeys at autox.team.net<mailto:healeys at autox.team.net>
Sent: Thursday, December 20, 2018 9:51:43 AM
Subject: Re: [Healeys] tri power for sale

I encourage as many people as possible to "M" up their 100's.

Makes original cars that much more valuable.

M

On Thu, Dec 20, 2018, 9:52 AM Bob Spidell <bspidell at comcast.net<mailto:bspidell at comcast.net> wrote:

My understanding is that the 'kits' installed by dealers varied; the
complete one--the one done at the Healey shop--includes higher
compression pistons, a more aggressive cam, some suspension tweaks
(stiffer shocks, maybe a larger anti-sway bar), a different distributor
and, of course, the louvred bonnet.

Someone wrote up a list of mods that could be done--even better cam
profile, for example--that could be done to a 'stock' BN1/2 to achieve
performance superior to a M, while keeping the original 'flavor' of the car.

Bob

On 12/19/2018 11:14 PM, sentenac.rw at gmail.com<mailto:sentenac.rw at gmail.com> wrote:
> Well, for starters you can look at page A34 of the  Moss Motors
> catalogue.  The section labeled "100M Conversion".  It may be a
> different page on the latest catalogue.  Carbs, Manifold set, cold air
> box,etc.
>
> -Roland
>
> On Wed, 19 Dec 2018 18:48:10 -0500 (EST), you wrote:
>
>> I recently purchased a 1955 100-4 for a frame off restoration. Since I'm going to rebuild the engine, I'd like to give it the "M" upgrade. Does anyone know where I can purchase the parts for what they call the LeMans kit? Thanks.
>>
>> Regards,
>>
>> Charlie Schott
>>
>>
>>
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