Among the wilder opportunities...
Among the wilder opportunities is the ERL Performance Superdeck I and II systems, which offer a combination of adding Darton ductile iron sleeves and an aluminum deck that bumps the deck height up to allow building something like an LS2 engine with a 4.20-inch bore and a 4.50-inch stroke displacing 499 ci. This particular photo is of an LS1 block.
The ultimate aluminum Gen III/IV block has to be the fully machined billet block with water jackets available through Dart Machinery. Assuming you want to maintain the standard Gen III/IV 4.400 bore spacing, there are plenty of options available in terms of deck height, cylinder liner depth, and cam placement. Don't kid yourself-a Dart CNC billet block is mucho dinero, but it is also custom CNC-machined to your exact specs. Prices vary with the combination, so call Dart if this is a silver bullet with your name on it. You're guaranteed to be the only one in your neighborhood with one.
| BORE AND STROKE/COMBINATIONS |
| STOCK |
| DISPLACEMENT |
| CI | LITERS | RPO | BORE | STROKE | BLOCK MATERIAL |
| 293 | 4.8 | LR4 | 3.780 | 3.268 | iron |
| 325 | 5.3 | LM4 | 3.780 | 3.622 | iron and aluminum |
| 346 | 5.7 | LS1/LS6 | 3.898 | 3.622 | aluminum |
| 364 | 6.0 | LQ4/LQ9 | 4.000 | 3.622 | aluminum |
| 375 | 6.2 | LS2/LS3 | 4.060 | 3.622 | aluminum |
| 427 | 7.0 | LS7 | 4.125 | 4.000 | aluminum |
This is a piston used by Schwartz...
This is a piston used by Schwartz Extreme Performance with a 4.00-inch stroke crank on a production LS2 block. Schwartz believes the scoring is a result of the longer stroke exposing more of the piston skirt beyond the bottom of the bore.
| STROKER |
| DISPLACEMENT |
| (CI) | BORE | STROKE |
| 359 | 3.780 | 4.00 |
| 383 | 3.900 | 4.00 |
| 402 | 4.000 | 4.00 |
| 408 | 4.030 | 4.00 |
| 414 | 4.060 | 4.00 |
| 416 | 4.067 | 4.00 |
| 422 | 4.100 | 4.00 |
| 427 | 4.125 | 4.00 |
| 434 | 4.155 | 4.00 |
| 439 | 4.127 | 4.10 |
| 445 | 4.155 | 4.10 |
| 454 | 4.125 | 4.25 |
| 461 | 4.155 | 4.25 |
| 481 | 4.125 | 4.50 |