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

[Michael Amick]

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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