Mark Gearhart
March 17, 2017
Photos By: Henry De Los Santos

So, you’re through your typical mods list on your Coyote. Tune, check. Air intake, check. Headers, check. Maybe you’re not ready to make that transition to a power adder or you’re looking for a throttle body on your BOSS 302 intake? Ford Performance’s 90mm might be your hot ticket for a quick boost of horsepower.

To start, there are two different intake manifold adaptors depending on the intake manifold you’re using. The M-9474-M50 is designed for the 2011-2014 GT manifold and will rotate the throttle-body 15 degrees counter clockwise (looking at it from the front) so the electronics will clear the heater core line on the passenger side of the head. The M-9474-M50B is a straight through intake manifold spacer that’s used with the BOSS 302 intake manifold. Since the throttle body is 10mm larger than the stock counterpart, it will interfere without the spacer. The BOSS 302 intake manifold can be ported to eliminate the spacer but RTV will need to be used to seal up the larger opening.

What’s that extra 10mm of throttle body opening get you? Another 219 CFM (without the adaptor) of maximum airflow capacity. Looking at the numbers, the stock throttle-body will flow 913 CFM, 1,101 CFM with the 90mm paired to the adaptor, and 1,132 CFM without it. This means that as the more power you make and the need of additional air increases, the Ford Performance 90mm billet throttle-body will multiply its power capability automatically. All airflow numbers have been validated on Ford Performance’s in-house SuperFlow SF-1020 flow bench at 28-inches of water.

The electronics affixed to the new throttle-body is the same found on the GT500 throttle-body used with the Cobra Jet intake manifold. You will need to de-pin the factory throttle body plug and transfer them to the new plug in the same location. Swap them one at a time to avoid confusion. Outside that, the installation is as simple as a few screw cap screws.

Also like the Cobra Jet throttle-body options, the Ford Performance 90mm will need a tune to function properly. For our engine dyno tuning session, we enlisted the help from notable Mustang tuner Eddie Rios of Addiction Motorsports.

When installing this throttle-body onto a factory air intake, the intake will need to be cut and a coupler reducer will need to be used. At this point of modification there should be a cold air intake installed so we are going to skip this step.

1. Our test mule is a brand new, stone stock 2014 Mustang crate engine. Only modifications for the before dyno testing is a BOSS 302 intake manifold, JLT cold air intake, and custom 91 octane tune through an SCT X4 by Eddie Rios.

2. The adaptor for the BOSS 302 is double o-ringed and installs in line with the included, longer cap screws.

3. The electronics on the Ford Performance throttle body is different from those found on a factory Mustang and require the use of an adaptor plug that comes with the throttle-body. It’s as simple as removing the red lock cap on the inside of the plug with a small screwdriver and using a de-pinning tool to remove each wire from the back of the connector. Swap one wire at a time into the identical position of the new connector.

4. A custom tune is required for this throttle-body. Rios has extensive knowledge of what’s needed from a throttle mapping perspective and loads in a custom tune into our SCT X4 handheld tuner that then transfers to our Ford Performance Controls Pack PCM.

5. The proof is in the pudding. The Ford Performance provides consistent and positive gains across the entire powerband. Peak horsepower of 492.1 is achieved at 7,400 rpm – a gain of 8.2hp. Our torque numbers came in at 402.2 lb-ft at 5,400 rpm – a gain of 5.6. Solid improvements that will continue to pay off as we push the power further on this engine.