SCT Performance tunes VMP Tuningâ€™s Gen2 TVS supercharger on a 2015
By Steve Turner
Avid followers of Mustang power adders are quite familiar with the popular Twin Vortices Series supercharger based on Eatonâ€™s rotors. This technology rose to prominence as an upgrade for the Roots supercharged â€™07-â€™12 Shelby GT500s. Eventually it became a mainstream aftermarket upgrade for Mustang GTs, before becoming a factory option on the 2013-2014 GT500s.
One of the popular purveyors of TVS superchargers for Mustangs is Roush Performance. You know from our recent coverage that Roush offers its own TVS kit for the 2015 Mustang GT, which offers a complete supercharger upgrade for the new Mustang GT featuring the popular Gen1 TVS supercharger.
For many people, this option offers plenty of performance and a warranty to go along with it. However, there are always people who want even more performance. Those people are SVTP members and readers. You fine folks know that VMP Tuning partnered with Roush to create its own line of Gen2 2.3-liter TVS superchargers, which offer numerous tweaks designed to maximize flow and efficiency.
â€œWith the 2015 being heavier, the torque of the TVS is more important than ever. However, we don’t leave any horsepower on the table either. Our Gen2 blower is poised to serve the customer that has a daily driver and wants 600 rear-wheel horsepower, to people like my wife, Rebecca Starkey, who want to run 8s in the quarter mile,â€ Justin added. â€œWe are able to supply a wide range of pulley options for the TVS to run anywhere from 8 to 20-plus psi and make 550 to 900-plus rear-wheel horsepower.â€
Aside from the improvements found in the VMP kit, the packaging constraints of the latest Mustang required numerous tweaks for fitting any TVS supercharger on the new-school Coyote.
â€œFor 2015 the lower intake and blower sit lower in the engine bay to clear the new lower hood line on 15s. The CAI is a little different as the engine bay got narrower up front. The belt system and heat exchanger are the same, which means our eight-rib conversion kit still fits and our triple-pass dual-fan heat exchanger is carryover as well. Technically a 2015 kit will fit an â€™11-â€™14, but an â€™11-â€™14 kit will not fit a â€™15 or newer without drop motor mounts.â€
Installing it is one thing, but with any modern car there are other mountains to climb. We didn’t see an early onslaught of insanely supercharged S550s that we might have expected, because tuning the latest Mustangs has been a challenge. This is largely due to a new software strategy inside the new TriCor PCM.
â€œThe best way to put it, tuning the 2015 Mustang GT is similar but different. Ford switched to a Continental computer, and on the surface, many of the tables are the same, but some of the ways they are implemented has changed,â€ Justin explained.
Fortunately, Roush Performance provides a calibration with its TVS supercharger kits for the 2015 Mustang GT. It makes a TVS kit a worry-free bolt-on. However, this calibration is meant to serve the as-delivered Roush kit, not the higher output VMP system. Such a system calls for custom tuning, which is where SCT Performance comes in.
Fortunately, we had the opportunity to follow the installation of a VMP Stage 2 TVS supercharger kit (PN STAGE250GEN2; $6,999) on Matt Aldermanâ€™s 1,200-mile GT. This kit includes optional upgrades like a VMP TwinJet 67mm throttle body, a twin-fan/triple-pass heat exchanger. Students of the sport know that Matt is the head calibrator at SCT Performance, so he was able to dial in the combination for maximum power.
â€œWhen first starting this project I had a lot of obstacles to overcome. The main one was the throttle body,â€ Matt explained. â€œIn 2015 Ford changed the electronics on the stock throttle body and therefore when changing to the previous year the are many parameters that needed to be found and tested.â€
As you will see, a 2015 5.0, a VMP Gen2 TVS, and Mattâ€™s tuning makes for a potent comboâ€¦