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Re: [Spits] Rear suspension modification question (Joe Curry)

To: <spitfires@autox.team.net>
Subject: Re: [Spits] Rear suspension modification question (Joe Curry)
From: "Shane Bradley" <Shane.Bradley@infinity.co.nz>
Date: Mon, 2 Jul 2007 08:47:34 +1200
Hi

I have been looking around for suspension bits for herald and came
across this a couple of days ago. Never used it, never seen them, but it
might be a start.

http://www.btinternet.com/~jon.wolfe/wolfitt_products_1.htm#Adjustable%2
0rear%20vertical%20link%20kit


Cheers
Shane
1968 13/60 herald

------------------------------

Message: 2
Date: Mon, 25 Jun 2007 08:57:19 -0700
From: "Joe Curry" <spitlist@cox.net>
Subject: Re: [Spits] Rear suspension modification question
To: "Chris Crisenbery" <ccrisenbery@fellerfinch.com>,
        <spitfires@autox.team.net>
Message-ID: <004f01c7b741$831cabc0$2d02a8c0@Belkin>
Content-Type: text/plain; charset="iso-8859-1"

Chris,
I don't recall seeing anything like you describe in the books I have
from Kas.  But it all depends on which suspension you are working with.

On the standard early Spit swing axle, the two control arms in the rear
suspension are the spring (forming the upper element) and the axle
(forming the lower one).  Since the position of the suspension has a lot
to do with the camber that is achieved, lowering the car by reducing the
spring arch or by adding blocks between the spring and the diff are the
only two choices you have short of lengthening or shortening either the
axles or spring.

Kas recommends reducing the spring arch to 3.5" which does a good job of
increasing negative camber and lowering the car.

I have also seen some photos of people who have drilled the uprights to
place the spring eyelet lower on the upright and thus changing the
relativity between the upper and lower control elements.  I haven't seen
any data on what effect that would have and am not sure that I would
want to go that route.  It seems that might have some odd effects on how
the suspension works.

If you get any actual data on that or any other more radical
modifications, I'd love to hear about it.

Cheers,
Joe

----- Original Message -----
From: "Chris Crisenbery" <ccrisenbery@fellerfinch.com>
To: <spitfires@autox.team.net>
Sent: Monday, June 25, 2007 7:47 AM
Subject: [Spits] Rear suspension modification question


> Dear Listers,
>
> I'm looking at making an adjustable rear shackle to be able to adjust
> the rear tires camber.  I believe Kas Kastners book has a picture of
an
> adjustable shackle.  I'm talking about the piece that attaches at the
> end of the spring and bolts to the rear axle trunnion and lower shock
> mount.
>
> Have any of you done this modification?  I believe the Kas detail
shows
> the 2 "eyes" being whacked off of the shackle and a rod end welded
onto
> each side to take it's place.  I believe when you screw the rod ends
up
> you will lengthen the overall length of the shackle and it should
raise
> the car by having less camber on the rear wheels.
>
> I would be interested in any pictures or experience in doing this mod.
>
> Thanks
>
>
> ___________________________
>
> Christopher E. Crisenbery, P.E.
> Feller, Finch & Associates, Inc.
> 2797 Spring Arbor Rd., Suite B
> Jackson, MI 49203
> p/n (517) 783-0710
> fax (517) 783-0711
> _______________________________________________
> Spitfires mailing list
> Spitfires@autox.team.net
> http://autox.team.net/mailman/listinfo/spitfires

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