help w/ old 426 hemi piston part #
 

I have 426 apart restoration project,has pistons that I'm guessing were direct connection parts are part # 2531965 O/S, they are .005 oversize forged piston look like old TRW forging guessing that's mopar,dodge,plymouth direct connection part # since most all TRW #'s began w/ L.
Just curious if someone has some info,just want to make sure it's not a higher compression piston.
Balancing this thing everything in it is a chunk has a 3036.0 gram bobweight!!!

Were any of 426 external balance? All info I 've says internal
Mike Taylor 3601

Re: help w/ old 426 hemi piston part #
 

Sounds like a production piston. If it was a Direct Connection part it would start with a P.
They were pretty heavy too. I'm pretty sure they were internal balance.

Re: help w/ old 426 hemi piston part #
 

Seems like a stock replacement piston. Are you sure they are forged? Does it have an arrow on it?
Your balance numbers are probalby right on. The rods and pistons weigh a ton. They are all internally balanced.
This is from my memory of my old stock eliminator days.

Re: help w/ old 426 hemi piston part #
 

That's some heavy metal. 440's are frequently in the 25-2600 range.

Re: help w/ old 426 hemi piston part #
 

Thank's for replies guys
pistons are forged look like TRW's not sure who's part#.
Talked to Gary Thompson @ ABS products yesterday if you don't know him he's the balancing guru, he said around 3200gr. was about typical bobweight and they were all internally balanced.
Going to put heavy metal test weights on today and spin and find best spots and close to right amount of heavy metal,I know will be about 4'' worth give or take a little, counterweights are 1.250'' thick so get to drill 1'' hole 5'' deep all together.

BTW if anyone needs to know Eagle has heaviest counterweights they have 2550 gr. target weight they will balance w/o heavy metal, K-1 2350 gram Scat ?they make mopars also. I'm going to say about the same I was on tech chat w/ scat told had 3035gr, bobweight conversation endedLOL
Mike Taylor 3601