mountune High Performance 2.3L Focus RS/Mustang EcoBoost Short Block
Ford EcoBoost 2.3L
Focus RS 2016-2018
Ford Mustang EcoBoost 2.3L 2014+
mountune’s extensive knowledge of the Ford EcoBoost engine coupled with broad motorsport experience provides the foundation for our Premium High Performance 2.3L Ford EcoBoost short block. Each short block is skillfully assembled using a brand new Ford RS engine block coupled with Forged Pistons, Forged Connecting Rods, high performance bearings and an RS forged crankshaft. This short block is the perfect foundation for your Focus RS or Mustang EcoBoost for high boost applications including track day use. We take the guess work out of critical engine assembly allowing you to install your existing cylinder head and other base engine components to this premium improved foundation. We also include our RS oil control pan upgrade and a new mountune ICR head gasket.
Short Block Features
The genuine RS engine block is first inspected, de-burred, and the bores are honed to perfection to receive Forged Pistons. The rotating assembly that includes a Ford RS Forged 94mm crankshaft (keyed option and lightweight option available) and Forged I-Beam Connecting Rods is balanced to within .5 gram. The select parts are professionally assembled by one of mountune's skilled engine builders using tri-metal race spec bearings. Each assembly includes a detailed data sheet showing all critical engine dimensions.
- Bore: 87.5mm
- Stroke: 94 mm
- Compression Ratio 9.5:1
- mountune Light Weight Crank Option
- New Ford EcoBoost RS Engine Block
- New Forged 94mm Crankshaft *Optional Lightweight Crank
- Forged I-Beam Connecting Rods
- Forged Pistons and Rings
- mountune Tri-Metal Bearings with Locating Tang
- Assembly balanced to within .5 gram
- Complete blue-print assembly
- Ring gap set
- Bearing clearance set
- Deck height checked
- Connecting Rod side clearance set
- Crankshaft end float set
- Balance Shaft Delete included
- mountune ICR Head Gasket
- Keyed crank with matching chain sprocket and crankshaft pulley (optional extra cost)
Connecting Rod Features
The connecting rod is one of the most highly stressed components within the engine and improved connecting rods are an essential upgrade for high power EcoBoost engines. Our Forged I Beam connecting rod was developed using extensive FEA analysis resulting in the optimum connecting rod for applications up to 200 bhp per cylinder. Made in the USA to our specifications, each connecting rod incorporates our motorsport DNA to provide you with the ultimate component for your engine. Exclusive features include a robust, I – Beam configuration with extensive machining to optimize weight without reducing strength. All edges and corners are radiused to improve durability.
As an added upgrade, mountune connecting rods feature machined tangs to securely locate the rod bearings. Compared to the factory press fit tangless bearings, this feature ensures improved bearing retention in high cylinder pressure and high RPM engines. Tool steel connecting rod bolts are also standard and are superior to most bolts found in other rods on the market. Silicone/bronze pin bushings provide a durable and low friction surface that remains dimensionally stable in high pressure and high RPM applications.
This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards. Click Here
for Emissions compliance information.
Owning a Mountune Racing Engine has never been easier!
We offer multiple options to make obtaining your own Mountune USA custom engine assembly simple. With a 50% deposit we can start your engine assembly process. The remaining balance will be due upon completion of your long block or short block engine.
You can also take advantage of 6 months of no interest financing of your Mountune long block or short block engine assembly on approved credit with PayPal Credit. For more information click here.
Please note engine assemblies, both long and short blocks, are considered custom products and cannot be returned. Additionally, once the engine build and assembly process has begun, the order cannot be canceled.
For more information please contact us at info@mountuneUSA.com or to order by phone call 714-424-9400.