wrist pin bore on IDIT pistons

[IDIoit]

what we have here is a ford .020 over piston from ford.
inspecting them today, I found that the bore of the wrist pin has clearance for oil im guessing?

I know im comparing apples to oranges here...
but the small slugs are for a gasser 467

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[Thewespaul]

Thats normal, my 20 over idit pistons have that as well, but they are already assembled otherwise Id get you a pic.

 

[IDIoit]

I know its "normal" but what is the reasoning for it?

 

[Thewespaul]

Hard to say, Id be curious to see how different it is from the na clearance. Possibly just another thing ford decided would help these engines last with the turbo.

 

[IDIoit]

I have a new set of 030 over N/A pistons, ill check them

 

[MTKirk]

I don't remember seeing anything like that on my 6.9 pistons (old ones or the new replacements)