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Rookie

07-13-2005 12:47 PM

Piston "?"

I took off my heads last night, High performance chevy rectangular port. And the pistons had "L 2399 030" on them. The engines supposedly started life as Merc 425's. The heads have had some bowl porting and now have 114.5 cc stamped on them. My cranking compression is 170 lbs on the cylinders without the blown head gasket. Any Ideas as to what the compression ratio is and what cc pistons I have, or just flat tops? I believe they are TRW pistons.
Thanks

rmbuilder

07-13-2005 01:33 PM

Re: Piston "?"

Rookie,
The L 2399 +.030 is a open chamber TRW forged piston. It has a .095 dome and a 1.645 compression height. They should net approx 9.1:1 CR @ 115 CC combustion chamber depending on the deck and gasket used.
Bob

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