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alluminum crossmember
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09-20-2007, 01:12 PM
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AutoBahned
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Is it a forged one??
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09-20-2007, 08:41 PM
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not sure if forged or cast alluminum
out of an 80sc |
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09-22-2007, 06:51 AM
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bbb
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09-22-2007, 06:58 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Quote:
Those are cast. Only the '73-'74 RS cars had a forged one.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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09-22-2007, 08:48 AM
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thx - thought it might be a rare RS forged one b/c of the price
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09-22-2007, 11:42 AM
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Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
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There are three choices:
- The OE steel cross member. There are two versions; ‘65-’67 and ’68-’73. - The Forged ’72-> RS/RSR aluminum version (a race part and very expensive if you can find one). - The ’74-> cast aluminum version. There are pro and cons to each. Since this part is to the front and low, I don’t think weight or CG is an issue in most situations. The steel part (and forged aluminum one) strengthens the chassis in front. The down-side is you want the suspension to be more fragile than the chassis. It is desirable for the suspension components to yield (fail) before there is chassis damage. The cast aluminum part allows this (it is least expensive and readily available used.) A desirable feature of the two aluminum components is there is more room for fuel pump and fuel filter alongside the cross member. As any engineering situation, there are pro’s and con’s for every set of parts. Best, Grady
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09-22-2007, 01:58 PM
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