"Del Cecchi" wrote
Why is it that etec needs special rocket science NASA aluminum that is
really really extra strong and tolerates especially high temperatures in
its pistons? Don't they use normal cast or forged aluminum pistons?




Del,

Then if there were only 2 types of pistons, cast or forged, then why have 2?
Why make a motor that has to use a forged piston with different clearances,
even though they are stronger, instead of cast pistons which are cheaper to
produce? Just make 1 model, and only use one aluminum alloy for every
conceivable engine made or in design.

This link might give you some more information:

http://www.pacmaterials.com/technology/Technology.htm

Bill Grannis
service manager