Oh, my mistake. Sealed Power 2286 that you measured at 2.034 vs the production 2.031. That helps me out. Thank you.
@BSB67, I think your piston is a 2266 trw. Trw claimed that was a 10/1 piston (hahaha) at .092 down in the hole.
Edit: that 2266 is literally the heaviest piston in my trw book, 880 gr. Plus or minus 10gr.,and a 225gr pin.
@BSB67, I think your piston is a 2266 trw. Trw claimed that was a 10/1 piston (hahaha) at .092 down in the hole.
Trw sixpack forged replacement was L2355F, 022 in the hole, with a 2.061 c.h.
Trw had four different forged pistons for 440s back in the day, 2266, 2295 (dome),2355, and2388. I have weights, volumes and measurements from a 1989 trw catalog if anybody needs them.
Unfortunately, i don't have info on original 6pack cast pistons for the op.
Edit: that 2266 is literally the heaviest piston in my trw book, 880 gr. Plus or minus 10gr.,and a 225gr pin.
I was just going by what I could see on your post #4 on my phone. And there is no valid 2286 in my1989 trw book. If its later than that, or a sealed power, than I'm mistaken Sorry, I didn't mean to insult you, and I didn't have access to the better pictures you posted later. And I did say "I think".i didn't suggest anything.
10-1 with a 68 cc chamber... To bad the average BBM head has a 88-90 cc chamber....
And yet if you walked into the average machine shop & ask for a 10-1 440 with forged pistons thats the piston you got nine times out of ten...
True measured C/R around 8-1... Now cam it for your "10-1" C/R & you have the perfect recipe for a dog.... & I'm not talking about the BBQ served outside the base at Subic Bay PI....
where is the valve reliefs? the 6 pak motors I have worked on had valve reliefs from the factory.
Suggesting I cannot read a part number and a caliper? Does this help you. I purposefully purchased these pistons in 1990. They have long since been unavailable. They sit 0.048" in the hole. I have the original bill of sale if you'd like to see it.
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