Which looks easier to do? Have custom cups made, or custom springs?
Far be it for ME to suggest modern technology, but valve springs
could be made in any size, or an existing set with the right
dimensions could probably be had. A nice set of three-piece springs
in a smaller diameter would make it possible to use smaller cups.
The key parameters are fitted length, fitted load, compressed length,
compressed load, and of course, diameter. Making a spring larger in
diameter actually makes the spring constant lower. It should be more
than possible to duplicate the original spring constant in a smaller
diameter.
Simon
Steve Hammatt wrote:
>
> Simon
> You nailed it! The required valves springs need the larger i.d.
> of the large size cups. No luck so far, but thanks to everyone for
> the suggestions...
> Steve
>
> ----- Original Message -----
> From: "Simon Favre" <simon@mondes.com>
> To: <WSpohn4@aol.com>
> Cc: <shammatt@sos.net>; <vintage-race@autox.team.net>
> Sent: Wednesday, November 29, 2000 11:36 AM
> Subject: Re: Clarification on Valve Cup information..
>
> > Oddly enough, the Alfa cups are almost exactly the same size as the
> > Jag cups (1.377").
> >
...
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