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Big Block Clones LLC
60mm Stroke Crankshaft for Small Block GX Clone
60mm Stroke Crankshaft for Small Block GX Clone
Regular price
$104.95 USD
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$104.95 USD
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The final word in small block stroker builds!
For serious engine builders only!
Forged steel 60mm stroke crankshaft for the GX200 and clone engines. This crankshaft will require clearancing of the block and camshaft.
Rod Journal Diameter: 1.181"/30mm (GX200/Clone)
Flywheel Taper: GX200/Clone
Displacement:
- 70mm bore = 231cc
- 72mm bore = 244cc
- 76mm bore = 272cc
Here are some rotating assembly combinations that you can build with our cranks and our 72mm bore block:
| STACKUP w/ rod and piston | BORE X STROKE | DISPLACEMENT | PISTON CROWN DISTANCE TO DECK AT TDC | Rod/Stroke Ratio |
| Use 72mm "550" - 0.906" CH flat top piston | ||||
| 54mm Crank + ARC 6771 - 3.403" | 72mm x 54mm | 220cc | 0.014" under the deck | 1.60:1 |
| 55mm Crank + ARC 6771 - 3.403" | 72mm x 55mm | 224cc | 0.005" above the deck | 1.56:1 |
| 58mm Crank + ARC 6271 - 3.323" | 72mm x 58mm | 236cc | 0.015" under the deck | 1.46:1 |
| 58mm Crank + ARC 6266 - 3.343" | 72mm x 58mm | 236cc | 0.004" above the deck | 1.46:1 |
| 59mm Crank + ARC 6269 - 3.313" | 72mm x 59mm | 240cc | 0.003" under the deck | 1.42:1 |
| 59mm Crank + ARC 6271 - 3.323" | 72mm x 59mm | 240cc | 0.013" above the deck | 1.42:1 |
| 60mm Crank + ARC 6270 - 3.303" | 72mm x 60mm | 245cc | 0.005" above the deck | 1.40:1 |
| 60mm Crank + ARC 6269 - 3.313" | 72mm x 60mm | 245cc | 0.015" above the deck | 1.40:1 |
| Use Wiseco 17-2835XC 0.640"CH 3 ring piston | ||||
| 58mm Crank + ARC 6234 - 3.595" | 72mm x 58mm | 236cc | 0.007" under the deck | 1.57:1 |
| 59mm Crank + ARC 6234 - 3.595" | 72mm x 59mm | 240cc | 0.013" above the deck | 1.54:1 |
| Use Wiseco 11132P273 0.640"CH 2 ring piston | ||||
| 54mm Crank + ARC 6268 - 3.707" | 72mm x 54mm | 220cc | 0.024" above deck (cut the piston crown) | 1.74:1 |
| 55mm Crank + ARC 6268 - 3.707" | 72mm x 55mm | 224cc | 0.044" above deck (cut the piston crown) | 1.71:1 |
| 60mm Crank + ARC 6234 - 3.595" | 72mm x 60mm | 245cc | 0.030" above the deck (cut the piston crown) | 1.52:1 |
| **Always maintain a minimum of 0.030" clearance between the bottom of the head and the top of the piston using the correct thickness head gasket** | ||||
| Common Block Deck Heights | ||||
| BBC 70mm tall deck block deck height is 138.6mm | ||||
| BBC 72mm bore TC225 block deck height is 136.8mm | ||||
| Predator 224 block deck height is 136.5mm | ||||
| Tillotson racing block deck height is 135.5mm | ||||
| Predator 212 non-hemi deck height is 135.5mm | ||||
| Predator 212 hemi block deck height is 135mm | ||||
| Available ARC GX200 Clone rods | ||||
| 1.181" main journal X .709" wrist pin (550 flat top piston) | ||||
| 6267 | 3.283" | |||
| 6734 | 3.293" | |||
| 6270 | 3.303" | |||
| 6269 | 3.313" | |||
| 6271 | 3.323" | |||
| 6266 | 3.343" | |||
| 6270 | 3.383" | |||
| 6271 | 3.403" | |||
| 1.181" main journal x .490" wrist pin (.640CH pistons) | ||||
| 6234 | 3.595" | |||
| 6268 | 3.707" |
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