Fits: 2011-2015 Chevrolet Cruze, 2012-2015 Sonic, 2013-2015 Buick Encore and 2015 Trax

We are pleased to offer our Overkill tuning for the small yet potent 1.4 Turbocharged 4-cylinder Ecotec. The 1.4 Turbo motor offers tons of potential for power and fuel economy and Overkill tuning is here to improve both. Offering custom tuning through both Diablosport and EFI Live handheld tuning products, we offer a personalized touch over mass production tuners, more extensive revisions and lots more tuning options. Whether you want to get hardcore with your modding, or you want a simple and easy to use tune to pick up some performance or fuel economy, Overkill tuning is for you.

5 Overkill Tunes Provided with Your Diablosport Intune Purchase

  • 87 Octane Boost Control - Blends full throttle acceleration with fuel economy improvements at part throttle by controlling max boost perssure at lower rpms. Very smooth to drive. Will be a very popular tune with those who want to run regular fuel
  • 87 Octane Performance - Focuses on improving horsepower and torque at all engine speeds while maintaining 87 octane fuel
  • 87 Octane MPG - Uses extensive max boost control including at full throttle to maximize fuel economy gains
  • 91 octane Boost Control - Our favorite tune for higher octane. Increases boost pressures over factory at full throttle for improved acceleration but limits max boost pressures at lower engine rpm for MPG gains. Very smooth to drive and a great blend of MPG and performance
  • 91 Octane Performance - Provides full performance at all engine speeds, minimal boost reduction at lower rpms for lots of torque, great for spirited driving and drag racing
With all tunes, there are common benefits to an Overkill tune...
  • Responsive throttle pedal from standstill
  • Performance fueling activation and fuel targets revised to improve engine safety and performance
  • Each tune has fully customized spark timing and boost control to fit its design
  • Smoother power delivery, reduced engine knock especially on 87 octane tunes, less reliance on "adaptives"
  • 87 Octane tunes provide 10-15 ft-lbs of torque gain over factory tune, 91 Octane tunes provide 40-50 ft-lbs gain
  • Dyno quality custom tuning available with wideband air/fuel sensor rental
  • Speed Limiter removal, rev limiter in park raised
  • Removes P0420 code for aftermarket high flow cat converter installations
  • No charge revisions for new mods in the future






Diablosport Intune: The most user friendly way to provide our Overkill tuning is through a Diablosport Intune handheld. No laptop is needed, no physical installations, the Intune is very user friendly. The Intune can read, scan and flash from inside your vehicle. Load different Overkill tunes to suite your desire, easily stored in your glovebox or center console, return to factory in a few minutes with a few clicks. This option is ideal for most people!

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Our rental wideband allows us to do a dyno quality tune through a remote tune, by giving air/fuel metering that isn't available using the factory engine sensors. Highly recommended rental if you're interested in getting the best full throttle performance from your Cruze tune!








EFI Live Autocal: For those with an automatic equipped vehicle, we offer the Autocal tuning option in order to provide you with transmission tuning, something not available with our Diablosport option. I've always provided myself on being the guy who can sort out a poor performing factory transmission and with the 1.4 Turbo, you'll enjoy the difference Overkill transmission tuning makes.
  • Much improved upshift and downshift points at part throttle
  • No bogging around town or lugging into top gear too quick
  • An Overkill exclusive: Tapshift safety shifts will automatically upshift at full throttle so you don't miss a shift, prevents double upshifting by accident, and will automatically kick down at full throttle to the appropriate gear to protect the transmission.
  • The overall drive around town will feel lighter and easier.


The Autocal requires installing windows based software, and it is recommended but not required that you have a laptop.

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Best Fuel Injector Upgrade for the 1.4 Turbo


Our 50# fuel injector replaces the factory 34# injector for those running high boost levels. We feel we have the best solution on the market because our injectors retain the important projected tip design. These injector fuel deeper into the intake port, the same as the factory injector. These injectors idle as well as stock, and provide the fuel supply required for increase boost pressures and for E85/flexfuel use. They are also factory brand name and factory reliable!

Tip: Many people running high boost pressures may be maxing out their fuel injectors without realizing it, costing power and bringing up engine safety concerns. In our own testing at near sea level, the factory fuel injectors were good for 18psi running the air/fuel ratios you should be running when tuned. You should not be running more than 20ms on your injector pulsewidths if shifting at 6000rpm or 19ms at factory auto shift points, scan and check!



These three tuning tables will need to be changed when installing these injectors, click here






One of the best mods for your 1.4 Turbo as soon as you're tuned! The factory manifold has restrictor plates that block off half the intake runner exit, a ported unit removes this huge restriction. Feedback from the Cruze forum suggests this mod is worth about 15 wheel horsepower once tuned. Our ported manifold uses a brand new manifold and comes with new seals. This is an outright purchase, you don't need to send in your factory manifold.

Coming Soon!

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