05-13-2015, 05:25 AM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,949
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Not Ranked
Mike,
Shock specs depend on which Jag rear you use, as the lengths of the lower arms (wishbones) are different.
As far as I know there are three stock Jag lower arm lengths, from shortest to longest: XKE, 3.8S (and related), XJ6/XJS. Track width varies accordingly.
The shocks you need will depend on which arms you use, or if you are changing the lengths of yours (i.e. shortening the XJ6 arms).
I use the middle length, for the 3.8S sedan length wishbones, and the four shocks are from Aldan: PAS657.
I agree there is a "correct" length for each, as mine were too short to begin with and made for some interesting pucker moments on the track; as the car rolled a bit during a turn, the inside wheel would lift - picked up by the shock which was fully extended - and cause the car to skip sideways. Lengthening the rear shocks helped immensely!
Studying the ERA site (their 427 Jag rear specs specifically) leads you to this shock they use: Rear Jaguar damper, adjustable
Recognize your shock mounts may be different either from theirs or my Aldans...
Happy hunting,
Tom
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Wells's law of engine size: If it matters what gear you're in, the engine's too small!
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