CorvAircraft> How can you tell the difference between cast and forged pistons?

[Daniel Weseman]

Forged piston are somtimes  lighter since they are stronger?

Michael Amick <mkamick at bellsouth.net> wrote:  I assume (I know I know ass u me) there should be a weight gain with the 
Forged above the cast.
My forged .60 overbores are 19.4 onces w/ pins each.

Michael Amick
Nashville



Keith Rhea wrote:
> I bought a converted 95 hp engine that had flown on a Piet for 200 
> hours, was overhauled flew 8 more hours, lost RPM and landed in a corn 
> field. I bought the engine all torn down and all the parts, prop 
> included. I have checked the crank and cyls and they are standard. My 
> problem is i can't determine if the pistons are cast or forged. They 
> an "F" beside the wrist pin and inside the piston is a "C" with an n 
> inside of it. I see what would be die marks for casting. Then when i 
> read about Clarks forged description and they state on page 22 that 
> their sealed power forged pistons look like they have casting marks on 
> them. Other than the 601 cowl and spinner, I have everything to make 
> a flight worthy engine. And that won't be too far off. Maybe another 
> month or so. Can anyone tell me for sure what these pistons are? I 
> would hate to order a set from Clarks and find that's what i already 
> had.
>
> Thanks
>
>
> Keith Rhea
> N52VP
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