With the 2.0L and 2.3L Duratec I-4 engine finally reaching mainstream performance enthusiast acceptance, the demand for serious performance components is finally reaching the potential we have believed it would over 3 years ago when this engine debuted in the Focus. 2006 is the fourth year of Duratec production, and the first year in which every major component needed to build a truly high performance Duratec engine is available.
The short blocks described here offer improved strength out of the box, and an option of increased displacement to 2.0L and 2.3L Duratec owners at a reasonable cost. For our stock displacement engines, standard bore core blocks and crankshafts are disassembled, measured, and re-machined as required to accept new connecting rods and pistons. Our 92mm Big-Bore short blocks begin much the same way, but are sent to the boring machine to have their original 87.5mm sleeves removed and replaced with 92mm sleeves. Before assembly, the crankshafts are balanced internally, and the pistons, rings, rods, and bearings are weight matched. In addition, all measurements are checked on each component and all critical measurements are adjusted through matching the individual components or re-machining. Each engine comes with a complete spec sheet and build certificate.
Engine Features:
Remanufactured Focus 2.3L Duratec Cylinder Block, Standard 87.5mm (or Sleeved to 92mm on 2.5L version)
Remanufactured Focus 2.3L Duratec Crankshaft, De-Burred, Stress Relieved, (Ranger Spec Crankshaft Standard on 2.5L version)
Balance Shaft Assembly Removed and Balance Shaft Delete Kit Installed
Supertech Forged Pistons w/NPR Piston Rings (Specific 92mm piston skirt design for reduced ring pack wear on 2.5L version)
Eagle Connecting Rods
New Cosworth Heavy Duty Replacement Bearings
90 Day Warranty On Parts
Each engine is built to suit an individual customer's application, and as a result, this part must be ordered by phone. For this reason, please allow 6-8 weeks for delivery.
Note to potential engine consumers about increasing displacement in the Duratec engine:
Marcy Motorsport has been involved with the Duratec engine for over 3 years now, and during this time we have had the opportunity to fully research and test products for this engine at greater length than most of our competitors. We have found through research and testing that it is possible to exceed 2500cc with the Duratec, but the resulting engine becomes a series of compromises in design and longevity. Increasing the displacement to 2600cc, even 2700cc is possible, but the piston and rod combination becomes unreliable with poor rod angles and extreme angular loads on the piston skirts. As well as excessive piston speeds, excessive wear to the cylinder walls, piston skirts, and ring package will result from large displacement combinations. Combinations exceeding 2500cc should only be considered for track use, and then only by individuals willing to accept the short lifespan and potential for design related failure.
2.3L Short Blocks start at $1699 with core exchange or $1999 outright
2.5L Short Blocks start at $2599 with core exchange or $2899 outright
Options include:
Ranger Crankshaft on 2.3L
Cosworth Forged Pistons for 2.3L
Cosworth Connecting Rods for 2.3L or 2.5L
Ultra-Lite Profiled and Cryoed Ranger Crankshaft for 2.3L or 2.5L
Cosworth Billet Crankshaft for 2.3L or 2.5L
Darton Sleeves on 2.5L
Additional pricing and details can be found on our website.
The short blocks described here offer improved strength out of the box, and an option of increased displacement to 2.0L and 2.3L Duratec owners at a reasonable cost. For our stock displacement engines, standard bore core blocks and crankshafts are disassembled, measured, and re-machined as required to accept new connecting rods and pistons. Our 92mm Big-Bore short blocks begin much the same way, but are sent to the boring machine to have their original 87.5mm sleeves removed and replaced with 92mm sleeves. Before assembly, the crankshafts are balanced internally, and the pistons, rings, rods, and bearings are weight matched. In addition, all measurements are checked on each component and all critical measurements are adjusted through matching the individual components or re-machining. Each engine comes with a complete spec sheet and build certificate.
Engine Features:
Remanufactured Focus 2.3L Duratec Cylinder Block, Standard 87.5mm (or Sleeved to 92mm on 2.5L version)
Remanufactured Focus 2.3L Duratec Crankshaft, De-Burred, Stress Relieved, (Ranger Spec Crankshaft Standard on 2.5L version)
Balance Shaft Assembly Removed and Balance Shaft Delete Kit Installed
Supertech Forged Pistons w/NPR Piston Rings (Specific 92mm piston skirt design for reduced ring pack wear on 2.5L version)
Eagle Connecting Rods
New Cosworth Heavy Duty Replacement Bearings
90 Day Warranty On Parts
Each engine is built to suit an individual customer's application, and as a result, this part must be ordered by phone. For this reason, please allow 6-8 weeks for delivery.
Note to potential engine consumers about increasing displacement in the Duratec engine:
Marcy Motorsport has been involved with the Duratec engine for over 3 years now, and during this time we have had the opportunity to fully research and test products for this engine at greater length than most of our competitors. We have found through research and testing that it is possible to exceed 2500cc with the Duratec, but the resulting engine becomes a series of compromises in design and longevity. Increasing the displacement to 2600cc, even 2700cc is possible, but the piston and rod combination becomes unreliable with poor rod angles and extreme angular loads on the piston skirts. As well as excessive piston speeds, excessive wear to the cylinder walls, piston skirts, and ring package will result from large displacement combinations. Combinations exceeding 2500cc should only be considered for track use, and then only by individuals willing to accept the short lifespan and potential for design related failure.
2.3L Short Blocks start at $1699 with core exchange or $1999 outright
2.5L Short Blocks start at $2599 with core exchange or $2899 outright
Options include:
Ranger Crankshaft on 2.3L
Cosworth Forged Pistons for 2.3L
Cosworth Connecting Rods for 2.3L or 2.5L
Ultra-Lite Profiled and Cryoed Ranger Crankshaft for 2.3L or 2.5L
Cosworth Billet Crankshaft for 2.3L or 2.5L
Darton Sleeves on 2.5L
Additional pricing and details can be found on our website.
