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Is there any reason not to use hypereutectic Chevy 305 pistons with 77.5mm stroke? It just sounds too good combination to be true!
My block is missing 0.75mm from top and 1.9l head 1mm. Because of "too short" compression height of 305 piston it would still remain about 1.5mm below the top of the block, but with flat top pistons my CR would be approximately 10 or near which is quite good for street applications, I assume.
The light weight of 305 pistons and pins (and a 77.5mm crank) really attracts me. And those prices. But I'll have to check availability here next week. At least TRW should have suitable pistons (found from Flatlander Racing catalog).
Btw. the head I would use with this block is a ported 1.9l from 1972 with 42/37mm valves and bronze valve guides. Camshaft Enem X1 (duration 284, lift 11.7mm), hydraulic lifters, aluminum retainers and Crane 1x springs. On monday I'm going to buy Dellorto DHLA 40 sidedraft carbs and then start designing short intake manifolds and air cleaners (or an airbox) for them. It is kind of strange (but quite normal?) how a little tune up project slipped out of hands.
Lasse
My block is missing 0.75mm from top and 1.9l head 1mm. Because of "too short" compression height of 305 piston it would still remain about 1.5mm below the top of the block, but with flat top pistons my CR would be approximately 10 or near which is quite good for street applications, I assume.
The light weight of 305 pistons and pins (and a 77.5mm crank) really attracts me. And those prices. But I'll have to check availability here next week. At least TRW should have suitable pistons (found from Flatlander Racing catalog).
Btw. the head I would use with this block is a ported 1.9l from 1972 with 42/37mm valves and bronze valve guides. Camshaft Enem X1 (duration 284, lift 11.7mm), hydraulic lifters, aluminum retainers and Crane 1x springs. On monday I'm going to buy Dellorto DHLA 40 sidedraft carbs and then start designing short intake manifolds and air cleaners (or an airbox) for them. It is kind of strange (but quite normal?) how a little tune up project slipped out of hands.
Lasse