2287 P pistons

[preaction]

Can anyone ID these pistons a google search (nothing here) comes up with a few threads about them being used as a 396 chevy piston modified to use in a 428. I saw them through a bore scope that read 2287 P .030  there in a motor that I thought might have been a 390 but maybe they are a 428 piston. Sealed Pro came up in the search.

[plovett]

I am 99% sure I had a set of 2287 pistons in a 428 a long time ago.   They were forged.  I don't know if the blank they were made from was intended for a BBC, but I bought them new as 428 FE pistons.  They had shallow valve reliefs.

paulie

I think the valve relief/dish volume was 13cc and they were roughly equivalent to TRW 2245's.  I could be wrong, but that is what I remember.

[Barry_R]

Probably a relabeled set of TRWs.  TRW sold private label pistons to lots of other companies in the 1970s/1980s  including Sealed Power and Dana/Clevite.

[preaction]

This build was from the mid 80's so the TRW's sound like it, thanks.

[gt350hr]

  Sealed Power/Speed Pro brand . Same as TRW as Barry mentioned. heavy for sure , and there will be a problem with exhaust valve clearance with a big cam as the exhaust pocket isn't close enough to the cylinder wall. You will bend a valve if the cam has more than 246* @ .050.  Guess how I know.
    Randy

[plovett]

I am pretty sure mine came in a Sealed Power box.

[gt350hr]

   Sealed Power and Speed Pro were the same and that piston could have come in either box. Sealed Power was "mainly' replacement parts where the Speed Pro geared toward the "race" parts . With all of the buy outs and mergers it's anybody's guess  as to what you are buying these days. That doesn't mean what they sell is inferior in anyway.

[preaction]

Where I was trying to get at was if these pistons were in a FE it could be a 390 or a 428, just because these are in a FE doesn't mean its a 428 block does it ?

[plovett]

No, the pistons do not definitely mean you have a 428.  It could be a 390 bored to 4.16"  I had one of those once, and a cylinder wall cracked after a short time.

Usually the 390 blocks are taking to the stock 428 bore of 4.13", but that's not a good idea, in general, either.

Look for a "428" cast in the water passage under the center freeze plug. 

paulie

[gt350hr]

 They "usually" have the A or C scratch in the bell housing area but not "always" . There is a water jacket in the deck surface that is an ALWAYS indicator. "Wedge" shaped on a 390 and more "piano" or drooped on the end next to the head bolt for the 428. Dennis K provided this information taken directly from Ford factory blueprints a while back. It has been 100% accurate as expected.
   Randy

[jayb]

As I understand it, the water jacket hole discriminator is correct for DIF (Dearborn Iron Foundry) blocks, but not for MCC foundry blocks.  Different cores for the two foundries, I guess.  When looking at the water jacket holes, if they are the 428 style and DIF is cast into the block, it is definitely a 428 block.

[preaction]

Thanks Jay, The motor is all together and running in a driving car so I was hoping to ID it as a 428 with the piston, I will take the trans out in cooler weather.

[gt350hr]

  Thanks from me too Jay.
      Randy