- 1). Acquire any new DCX Hemi. Any style or displacement block can be used, provided the block itself is in good shape. The only difference between the 5.7L and 6.1L is the bore and piston size, both of which will be identically altered in the creating the 426. Try to make sure the engine's accessories and electronics are present and functioning, as the stock computer can be re-flashed to run the additional cubic inches.
- 2). Install the Darton sleeves into the block. This will allow a safe .08 overbore while maintaining a safe thickness for increased longevity. Though the stock bores can be used, it is not recommended as this will require using very short pistons. Darton Sleeves are much stronger and thicker than stock, and the recommended Ross pistons are fully skirted for reliability that's even better than stock.
- 3). Reassemble the engine with the recommended components. The block should not require any extra clearance, and the pistons come pre-notched for valve clearance. The only difference between assembling the DCX engine as a stroker versus stock is the installation of the ARP head and main studs, which require red Loctite on the block side to stay in place.
- 4). Replace the fuel injectors with higher flow units. The stock injectors will be completely maxed out by 4000 RPM.
- 5). Pre-program the computer with the new engine parameters and displacement. It is recommended a professional tuner handle this duty, though for start-up purposes any basic fuel map will do.
- 6). Take the engine to a qualified tuner, and adjust the air/fuel curve.
- 7). Install into vehicle.
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