« Reply #3 on: September 21, 2012, 08:12:22 AM »
Aluminium alloy is still good but I do not know who sells in sheet form. Works best on a textured machine faced pair, as does straight copper. Do not know what sort of compression ratio this technology starts to fail but it will be OK on a bubblecar. Get wild on compression and really you need a gasket that bonds, but was then awkward to get off. Here modern technology offers better sealing compounds that do come off now. Alternatively a machined obstical to prevent gas creeping out in conjunction with a gasket unless that machining is of a high quality is an option. Composite gaskets often offer crushable elements as a cheaper solution to that.
The temptation is therefore to not use the old thick gasket but just the modern compound. Fine if there is clearance/adjustability to take up the lower head. Clearly there is an option of using the basic technology of a metal gasket, now as a spacer, and modern sealing technology. That spacer can be re usable.
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