The following is a table of possible crank, rod, and piston combos for our tall deck non-hemi Predator style block. You can use the same math for any block as long as you have the correct deck height for the block that you are trying to use. We stock the 60mm stroke crank in the last two examples.
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DIMENSIONS
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DISPLACEMENT
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PISTON CROWN DISTANCE TO DECK AT TDC
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58mm Stroke with Stock Piston and ARC 6771 Rod
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70mm x 58mm = 223cc
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0.006" in the hole
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Block Deck Height
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138.6mm
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Piston Compression Height (W/ half pin bore)
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23mm
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Rod Length (center to center)
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86.436mm
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Effective Crank Throw (half of stroke)
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29mm
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59mm Stroke with Stock Piston and ARC 6770 Rod
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70mm x 59mm = 227cc
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0.006" in the hole
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Block Deck Height
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138.6mm
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Piston Compression Height (W/ half pin bore)
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23mm
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Rod Length (center to center)
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85.928mm
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Effective Crank Throw (half of stroke)
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29.50mm
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60mm Stroke with Stock Piston and ARC 6269 Rod
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70mm x 60mm = 231cc
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0.057" in the hole
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Block Deck Height
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138.6mm
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Piston Compression Height (W/ half pin bore)
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23mm
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Rod Length (center to center)
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84.150mm
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Effective Crank Throw (half of stroke)
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30mm
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60mm Stroke with Stock Piston and ARC 6271 Rod
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70mm x 60mm = 231cc
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0.047" in the hole
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Block Deck Height
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138.6mm
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Piston Compression Height (W/ half pin bore)
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23mm
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Rod Length (center to center)
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84.404mm
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Effective Crank Throw (half of stroke)
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30mm
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