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Car Forum / Pontiac / Pontiac Cars / June 2007421 piston question
I have a 64 421 that's been rebuilt once in it's life. It has 30 over pistons with the part number L2189. Anyone know where i can find the specs on this piston? I'm thinking it's an old sealed power number. Sounds like a TRW piston number, what kind of specs? >I have a 64 421 that's been rebuilt once in it's life. It has 30 over >pistons with the part number L2189. Anyone know where i can find the specs >on this piston? I'm thinking it's an old sealed power number. I'm looking for estimated CR, forged or regular, etc. > Sounds like a TRW piston number, what kind of specs? >>I have a 64 421 that's been rebuilt once in it's life. It has 30 over [quoted text clipped - 7 lines] > ----= East and West-Coast Server Farms - Total Privacy via Encryption > =---- This is a trw piston number check with a parts store that handle trw pistons, or go online. > I'm looking for estimated CR, forged or regular, etc. > [quoted text clipped - 9 lines] >> ----= East and West-Coast Server Farms - Total Privacy via Encryption >> =---- > This is a trw piston number check with a parts store that handle trw > pistons, or go online. [quoted text clipped - 18 lines] > ----= East and West-Coast Server Farms - Total Privacy via Encryption > =---- Jay, I measured the bore of the 421. Looks like it's been bored to 4.123 which is the 428 .030 overbore. So I guess I already have 428 pistons. I just need to find a set of heads now. Mark >> =---- > [quoted text clipped - 3 lines] > > Mark You probably have 30 over 421 pistons. They would have the valve reliefs for the pre '67 head. Technically it's a 428 now, but you'd still need the pre '67 heads to match those pistons. It would be nice to have some pictures to see what those valve reliefs look like. Got a digital camera?? Jay S >I have a 64 421 that's been rebuilt once in it's life. It has 30 over >pistons with the part number L2189. Anyone know where i can find the specs >on this piston? I'm thinking it's an old sealed power number. I see from this post that the 421 is already 30 over. I believe that makes the bore the same as a standard 428 bore. I've found one reference to L2189 pistons listed as "421 cast pistons 61-66" There was no specs unfortunately Jay S Hi Jay. My boss at the shop said they sound like TRW forged because of the L. >>I have a 64 421 that's been rebuilt once in it's life. It has 30 over >>pistons with the part number L2189. Anyone know where i can find the specs [quoted text clipped - 7 lines] > > Jay S We're doing a budget build with a mild cam. The pistons and bores are in great shape so I'd like to reuse them after have a shop hot tank and NDI the block. hopefully I can find the right (open chamber) heads for these pistons. >>I have a 64 421 that's been rebuilt once in it's life. It has 30 over >>pistons with the part number L2189. Anyone know where i can find the specs [quoted text clipped - 7 lines] > > Jay S |
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