New FE pistons with round pin retainers

[winr1]

Anyone seeing any of these ??
Round wire locks
................................
EngineTech cast pistons ( .040 over 390 with 428 crank )
Made in Mexico

Ricky.

[kraut61]

  Two cycle engnes have been using them forever. We would leave them in a horshoe "up" or "down" position. I've never seen an issue with them.

[1968galaxie]

Should work fine.
When I was building a couple of Porsche 911 type engines - they all used round type pin retaining clips.
They were Mahle Motorsports P/C 's I used.
A little different than what you show.
Pic below:

[winr1]

Thanks guys

The original 352 in my 65 F100 has the wire clips, has over 250,000 miles on it and none ever came loose
( rebuilt it 25 or so years ago )



Ricky.

[cammerfe]

The more usual sorts of pin locks are typically provided with instructions to put them in with the sharper 'corner' of the stamping to the outside. This supposedly helps them resist being pounded out by pin movement. (I hope I'm being understood. If one looks at the profile view of a pin lock, one side is slightly rounded by the stamping process on the raw part.)

Since a wire lock lacks the sharper corner, it's unable to resist the pounding.

I, personally, prefer double spiralocks. And best of all are floating aluminum plugs. I've also used plugs made of graphite-impregnated Teflon.

KS

[winr1]

Thank KS

I can feel the ridge on one side of true arcs

Also, seems some on here have used the spiral locks in place of true arcs

How would a floating aluminum plug or teflon work on the street if rarely driven ??



Ricky.

[cammerfe]

Aluminum plugs are usually used where the oil ring groove intrudes on the top of the pin bore. A 'filler' ring rides below the three piece oil ring. Although there is only slight clearance between the outboard end of the plugs and the cylinder wall, the ring arrangement serves to hold everything in place. The graphited teflon has lubricity so that touching the cylinder wall does no harm.

KS