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Author Topic:   light weight 355 assembly
posted September 29, 2004 10:08 PM
We are looking to build a light weight rotating assembly for a 355 sbc. This engine will have under 400hp. What crank or cranks should we be looking into? How light do they make these cranks? I see a lot of them around the 50 pound range. But I know they get lighter yet. What else besides rods and pistons should we be looking at to cut the weight?

posted September 29, 2004 10:45 PM
Light crank, rods, pistons, light flywheel, light harmonic balancer, light transmission components (i.e. Bert/brinn or in/out box), light driveshaft (alum or carbon fiber), light U-joints, lightened ring gear in the back.

That's all the driveline components that you can lighten up.... Scat makes some mid-weight cranks in the low 40-42lb range that are decently priced ($700 or so), after that they start going up in price the more weight you go down... Look at lightweight rods, and lightweight flat-top pistons with small chamber heads.