Shortly following the first do-it-yourself GT350 intake manifold swap performed by a 2015 Mustang GT owner on M6G, the experts at JDM Engineering have embarked on an install of their own to replicate and refine the process as well as validate the resulting gains from this intake swap.
First, a baseline dyno was performed on the auto transmission (3.55 gears) 2015 Mustang GT with the stock intake manifold, Airaid CAI, MagnaFlow Street cat back and an in-house JDM Engineering 93-Octane Street Tune, which produced 408 WHP and 385 WTQ.
After the baseline was performed, it was time for the Shelby GT350 intake manifold to be installed.
Nick at JDM Engineering explained, “to confirm the previous test done with this manifold we made only changes in the tune to compensate the larger throttle body and prevent surging. The manifold works great! But we do have some areas where the car lost some torque and power compared to the stock manifold.”
Once the GT350 IM was in and the beefed up Coyote was back on the dyno, it produced gains of 60 WHP and 43 WTQ at a new peak of 7300 RPM!
While JDM is still making refinements to its tune, they report that initial drivability is good. “The car actually feels like it has more low end response despite the areas where we lost a little power on the dyno. We assume most of that is due to the larger throttle body increasing throttle response. The car pulls nicely up top now compared to before and should yield some decent gains on the track.”
See JDM Performance’s full installation and results in the forums.