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1.0L 12v - Ecoboost 3-cyl
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1.0L 12v - Ecoboost 3-cyl
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Set of 3 forged 4340 steel connecting rods for Ford 1.0L EcoBoost 12V Turbo.
The 1.0 EcoBoost is a 999 cc turbocharged three-cylinder (71.9 mm bore, 82 mm stroke) built by Ford since 2012. Compact and heavily loaded, it powers a large part of the range and responds well to tuning.
Its factory rod, with a fractured cap, is not sold separately. ZRP forged rods provide the strength margin required as soon as boost pressure rises.
Machined from high-strength 4340 forged steel, these reinforced forged connecting rods secure the bottom end of the 1.0 EcoBoost as soon as power climbs beyond the factory target. They become essential when fitting forged pistons, raising the rev limit, increasing boost pressure or chasing extra torque, situations where the sintered-metal original rod eventually bends or breaks. Designed to absorb the heavy loads of highly tuned small three-cylinder turbo engines, these I-beam rods fitted with ARP 2000 bolts cover every discipline (rally, drift, drag, circuit and track days, hillclimb, time attack) and support Stage 2, Stage 3 and Stage 4+ builds, right up to full competition engines. Each rod is balanced and supplied with its high-performance bolts.
| Reference | Brand | Profile | Bolts | Pin diameter OEM 20 mm | Small-end width | Big-end diameter OEM 43 mm | Big-end width | Center-to-center OEM 137 mm | Weight per rod |
|---|---|---|---|---|---|---|---|---|---|
| R-FOR-006-I | ZRP | I | ARP 2000 - 5/16" - 38 mm | 20 | - | 43 | 19,55 | 137 | 383 g |
| Rod | Bolts | Torque | Recommended stretch |
|---|---|---|---|
| ZRP - I | ARP 2000 | 40,7 N·m | 0,140 – 0,152 mm |
Manufacturers recommend the stretch-gauge method as the reference: the instructions supplied with the kit always take precedence. The torque figures correspond to assembly with ARP lubricant.
| 4340 steel is a nickel-chromium-molybdenum alloy steel used in aerospace and motorsport alike. Forged then heat-treated (quench and temper), it offers excellent tensile strength, high fatigue resistance and real ductility. Compared with an original rod (often sintered/powder metal, optimised for series-production cost), a 4340 forged rod shows roughly +19% higher yield strength, +8% higher tensile strength and above all +19% to +37% higher fatigue strength, i.e. a fatigue life under cyclic loading several times longer. This is what makes forged 4340 the reference material as soon as boost and rpm climb. |
 | I-Beam profile. With its slimmer central section, the I-Beam rod is lighter: less inertia and freer rev pickup. It is the most common profile on modern turbo engines and the natural choice for a 1.0 EcoBoost build focused on revs. |
The rod bolt is one of the most heavily stressed parts in the engine. The key is to match the ARP grade to the real use of the build, then to strictly follow the assembly torque and stretch.
 | ARP 2000 (tensile strength ~220,000 psi, i.e. ~1,517 MPa) is the high-performance standard. Suited to builds up to 150 hp per cylinder with 5/16" bolts or 200 hp per cylinder with 3/8" bolts, and up to 8,500 rpm, it is the most common grade in circuit, track days, drift, rally, drag and hillclimb, recognised for its strength, reliability and versatility, with no particular storage constraints. |
In addition to torque tightening, measuring rod-bolt stretch is the most reliable check for optimal preload. The check is done with the bolt fitted: place the gauge (dial indicator) on the two ends of the bolt and read its actual stretch, which must match the recommended value (see the torque & stretch table above). This method removes the friction variations inherent in torque tightening and secures the assembly on heavily stressed engines. |
 | ZRP makes 4340 forged connecting rods known for their strength and precision, offered here in I-Beam profile with ARP 2000 hardware. |
 | 1) Small end 2) Small-end diameter 3) Rod beam 4) Rod bolt 5) Big end 6) Rod nut / bolt 7) Rod cap 8) Big-end diameter 9) Center-to-center |
These forged rods are designed for the Ford 1.0 EcoBoost three-cylinder engine, codes SFJA, SFJB, SFJC, SFJD, M1JH, M1JE, fitted notably to the Ford Fiesta and Focus 1.0 EcoBoost.
OEM reference: rod not sold separately (fractured-cap design specific to the EcoBoost range).
Investing in forged connecting rods means, above all, protecting the whole engine. A stock rod that lets go almost always destroys the block, the crankshaft and the cylinder head.
For the 1.0 EcoBoost, the extra cost of forged rods is nothing compared with the price of a full rebuild after a failure. It is the guarantee of a reliable build, able to handle the added power over time.
With their included ARP hardware and a versatile I-Beam profile, these forged connecting rods offer the best balance of performance, mechanical safety and durability for your Ford 1.0 EcoBoost.
