A gentleman about a half hour away from me has set of pistons he believes are for a 327 Chevy. But, before I spend the money, I am hoping someone has an old TRW catalog and can confirm their application. They are number L2278. Thanks in advance for any help.
Finding L2278 is obsolete and not in my TRW engine parts catalog from 1984. I think that may be the old 12.5:1 slug.
If he has a pair of 6" calipers we can figure this out easily enough. We need a Measurment over on the edge of the piston, beside the end of the dome. Measure down from the flat that matches the rest of the flat/non-domed top of the piston, down to the top of the wrist pin bore. NOT from the top of the dome, we don't need that dome height until later. That deck-to-pin bore dimension gets added to 1/2 of whatever the pin diameter is. this equal what is called "compression height". (Centerline of pin bore-to-deck of piston) 327 with stock rods has 1.675" compression height pistons. 350 with stock rod compression height is 1.560". 302 stock rod is 1.800" comp height. Once this is determined, we can better estimate dome volume and resulting compression ratio.
From an old forum post somewhere else: "According to an old TRW catalog, a L2278F is a 350 Chev stroker piston with a compression height of 1.52". 3.562 stroke using 5.7 rod. " I found another reference to a 364ci stroked 350. Might be that's what size you can stroke a 327 to? interesting, eric's pin height measurement idea is a good one.
@saltflats is correct. I found them in an old Gratiot catalog, They are 12.5:1 Compression ratio. Dome height and compression distance changes slightly depending on the over bore.
Thanks! I'm happy to have an answer, but bummed that they are 350 instead of 327 (as the guy thought). Dad had a .060 12.5:1 327 in my '56 Chevy when he street raced it back in the '70s.
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