Quote:
Originally Posted by MorphDaCivic
The Ford pinto 2.8 liter V6 had plastic (phenolic) cam gears, and from what I remember they would fall apart before the scheduled replacement period. The replacement part was metal.
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they did that for noise , plastic is quiet compared to all steel .
I can't see cam gear weighing very much (probably a 1lb or so ). Now you could get light weight flywheels or crank pulleys that will reduce mass by many lbs compared to stock but still I doubt you get much improvement in FE, maybe 1-2mpg max depending on drive conditions . I think city driving would get most benefit .