FMU Assembly with Fuel Lines, 1994-1995 Ford 5.0 Mustang

4FG238-068




$472.99
FMU Calibration
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Product Summary

The Fuel Management Unit Assembly with fuel lines for the 1994-1995 Ford 5.0 Mustang includes the proper lines and hose for the applications, for a direct bolt in use. When ordering, please note the fuel injector size you are running, and select the correct FMU calibration for your application.

The Vortech Standard Fuel Management Unit (FMU) is designed for use on multi-point electronic fuel injected engines. It is a secondary fuel regulator that installs in series with a stock regulator on the return line to the tank. The unit increases fuel pressure in proportion to boost pressure (this assumes the pump being utilized is of sufficient pressure and flow to deliver the fuel required). All Vortech FMUs feature CNC machined, 6061-T6 aluminum construction and a blue anodized finish.

The 12:1 FMU is standard in many Vortech systems. It is suitable for most applications running with original equipment injectors to maintain an air-to-fuel ratio of approximately 10.8 to 11.5:1 under boost. The pump utilized needs to provide sufficient flow to deliver the fuel pressure required in proportion to boost.

The 10:1, 8:1 and 7:1 FMUs are for Vortech applications that require less fuel pressure to maintain safe air-to-fuel ratios. The 6:1, 4:1 and 3:1 FMUs were designed for high-output custom applications where larger than stock injectors have been employed. For example, the 6:1 FMU can be used on Mustangs using either 30 or 36 lbs. per-hour injectors. The 4:1 unit was designed for either 38 or 42 lbs. per-hour injectors in the same application.

Recommended calibrations for commonly used injector sizes:
12:1 - 19lb./hr Injectors
10:1 - 24lb./hr Injectors (Cobra)
8:1 - 24lb./hr Injectors (GT)
6:1 - 30/36lb./hr Injectors
4:1 - 38/42lb./hr Injectors

FMU calibration recommendation based on most combinations, and may need some adjustment (higher or lower gain) depending on modifications. Vortech does offer an FMU Needle Bleed Assembly (6Z120-010) that enables the ability to bleed of up to 1 point of gain from a Standard FMU calibration (i.e. 8:1 calibration can be bled down to 7.5:1 or 7:1), to help fine tune fuel requirements. 

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