Hi Alan: I agree that simply purchacing new springs that you know are
correct is low risk, and easy to do.
However, those who are inclined to check their own can do so with simple
measurements of wire diameter, outside diameter, free length and number of
active turns. In general, the treatment of the steel has little to do with
the SPRING RATE as long as it is not overstressed.
A number of spring calculators can by found doing a google search. The one
I like is
http://www.efunda.com/DesignStandards/springs/calc_comp_designer.cfm
Jim,
BN1, BN2, BN6, BN7
----- Original Message -----
From: "Blue One Hundred" <international_investor@yahoo.com>
To: "Freese, Ken" <Ken.Freese@Aerojet.com>; "'healeys'"
<healeys@autox.team.net>
Sent: Wednesday, May 12, 2004 1:23 AM
Subject: Re: BJ8 carb springs
> Ken -
>
> If the springs aren't color coded, I wouldn't trust
> them. Get the correct color coded springs from burlen
> http://www.burlen.co.uk/ or su midel www.sumidel.com .
>
> Wire diameter and length doesn't tell you anything as
> the main issue is spring weight.... which can vary for
> the same length and diameter wire depending on how
> that wire is treated at the factory.
>
> FYI these springs rarely go bad, so you can probably
> use the old springs from your old HD8s if you still
> have them.
>
> Regards,
>
> Alan
>
> '53 BN1 '64 BJ8
>
> --- "Freese, Ken" <Ken.Freese@Aerojet.com> wrote:
> > I am wondering if the right springs are installed on
> > my new HD8's. The
> > manuals list a color code, which I have never seen
> > on any SU. My new springs
> > are .042 wire and 13.25 inches free length. My old
> > carb were .046 wire and 9
> > inches free length. The new springs aren't so easy
> > to slide the dashpot
> > over, either. Anyone know what is right or if these
> > are equivalent?
> > Ken Freese
> > 65 BJ8
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