Performance Tuning

ECU Tuning via
HP Tuners.

Partnered with Barefoot Tuning

Abstract Autoz has partnered with John Murray at Barefoot Tuning to bring professional HP Tuners calibration to our customers. John is an experienced tuner who specializes in 1995 and newer GM vehicles — but is capable of tuning most OBDII-equipped makes and models.

HP Tuners is the industry-leading reflash tuning platform. Rather than replacing your factory ECU, it reads your existing calibration, allows precise adjustments to hundreds of parameters, and writes it back — giving you a custom tune built specifically around your vehicle, your modifications, and your goals.

Contact Barefoot Tuning

John Murray

Text: (601) 433-2624 Johnc.murray@yahoo.com
1995+ GM vehicle specialisation — from C/K trucks to LS-swapped builds
OBD II Most makes and models supported — domestic, import, diesel and gas
HP Tuners Industry-leading VCM Suite — the same platform used by professional race teams
What Gets Tuned

HP Tuners calibration parameters

HP Tuners' VCM Suite gives John direct access to your factory control module — reading, editing, and writing back hundreds of calibration tables. Here's what can be adjusted to dial in your vehicle.

Fuel & Air Calibration

  • Mass airflow (MAF) sensor scaling
  • Volumetric efficiency (VE) tables
  • Short and long term fuel trims
  • Injector flow rate and dead time
  • Closed and open loop fuelling
  • Ethanol / E85 content compensation

Ignition Timing

  • Spark advance tables by RPM and load
  • Knock retard sensitivity and recovery
  • Per-cylinder timing correction
  • Idle timing adjustment
  • Cold start and warm-up timing

Boost & Forced Induction

  • Boost target tables by RPM and gear
  • Wastegate duty cycle control
  • Overboost and spike protection
  • Boost by gear mapping
  • Charge temperature compensation

Transmission Tuning

  • Shift scheduling and firmness
  • Torque converter lockup points
  • Line pressure tables
  • Shift timing and overlap
  • Tow/haul and performance mode calibration

Limiters & Driver Controls

  • RPM and rev limiter adjustment
  • Speed limiter removal or adjustment
  • Torque management reduction
  • Throttle response / pedal mapping
  • Launch control and no-lift shift (where supported)
  • Active exhaust valve control

Diagnostics & Data Logging

  • Real-time VCM Scanner data logging
  • Air/fuel ratio, knock, and boost monitoring
  • Fault code reading and clearing
  • Wideband O2 integration via ProLink
  • Pre and post-tune comparison logs
GM Specialisation

1995+ GM — the home turf

HP Tuners was built with GM in mind and has the deepest calibration support in the industry for General Motors vehicles. From the 1997 Corvette LS1 all the way through to modern Camaros, Silverados, and Duramax diesel trucks, John has the tools and experience to get the most out of your GM platform — whether it's a daily driver, a tow rig, or a purpose-built performance car.

This includes LS and LT engine swaps — if you've dropped a GM V8 into a non-GM chassis, John can tune it. HP Tuners also supports transmission control modules separately, so full powertrain calibration is available for vehicles running GM automatic transmissions.

Cars & Performance

  • Camaro (1995–present)
  • Corvette C5 through C8
  • Pontiac GTO / G8
  • Cadillac CTS-V / CT5-V
  • LS / LT engine swaps

Trucks & SUVs

  • Silverado / Sierra (1995–present)
  • Tahoe, Suburban, Yukon
  • Colorado / Canyon
  • 6.6L Duramax diesel (L5P & earlier)
  • 6.0 / 6.2 Gas HD trucks

Other makes & models

Beyond GM, HP Tuners supports a wide range of OBDII-equipped domestic and import vehicles. Ford, Dodge, and a growing list of import platforms are all supported. If you're unsure whether your vehicle is compatible, reach out to John directly — he'll give you a straight answer.

Ready to get tuned?

Contact John at Barefoot Tuning directly — (601) 433-2624

Text John Contact Abstract Autoz