The heart of the C7 system is a DSX Tuning proprietary PnP controller that uses CAN data.
The DSX Tuning Aux Pump Kit is the original and budget friendly alternative to big fuel supply with a simple installation. There's no need to get inside of the factory fuel tank, as this system taps into the tank and uses an external pump that ties back into the factory feed line. With the help of the factory fuel pressure control module, the ECM always knows what your fuel pressure is even when the aux pump kicks on to give a huge boost in pressure and flow.
There's no need to tap vacuum lines or install a Hobbs switch as the DSX Tuning controller utilizes CAN data from the parking brake jumper to trigger the pump. The controller is incorporated into an easy to install harness with minimal connections to ensure the end user doesn't have to do any wiring. The pump is activated any time the ECM commands 500kPa or higher fuel pressure and features a soft start function meaning the pump is not immediately commanded to full duty cycle and consequently results in a much smaller spike in fuel pressure. The controller also features a built in priming/purge function: simply key the vehicle on (but don't start the engine) and push the gas pedal. The pump will run proportional to how hard you push the gas pedal! If you need to pump fuel out of the tank or just want to purge the lines, this makes it easy. The controller is also programmed to disable the pump driver if the parking brake is engaging or disengaging so the factory wiring is not overloaded. These are made with all solid state electronics that are self protected meaning there are no fuses, mechanical switches, or relays that can fail from vibration or repeated arcing (this is what happens to a Hobbs switch or relay over time). What's more is there is no need to run any wiring from the engine bay since everything is contained within the rear driver's fender. This is the most advanced controller available and allows the tuner to activate the pump exactly when needed by modifying the pressure modes in the ECM.
The system features PTFE lined smooth bore crimped fuel lines to ensure leak free operation and corrosion resistance against ethanol for the life of the vehicle as well as inhibit any fuel odor from permeating through the lines. These lines are pressure tested by the manufacturer to verify against defects, so you can be sure that what you receive is the highest quality and rated for any fuel you will run through it. These lines are 8AN in size but use 6AN connections to allow full flow even through the fitting itself (typical 6AN lines and ends are significantly smaller internally when inserted in the hose). Don't be fooled by lower quality push lock, screw together, or plain braided hoses! DSX Tuning is committed to providing purpose built products and not repurposed pieces or a collection of off the shelf components bundled together. The pre-filter is a custom made 74 micron stainless filter exclusively for use with these pumps to minimize potential leak points, and the one piece billet tee fitting is a true push connect piece made exclusively for this application. There are no plastic clips that can melt or fail, and there are no backing nuts to fumble around with trying to tighten. The fitting is retained using a stainless steel clip.
Installation time is roughly two hours and can be done on jack stands. It is recommended to have a low level of fuel in the tank before installation.
This kit can be installed prior to tuning, but in order to take full advantage you will need HP Tuners or EFILive tuning software and access to a dyno / competent tuner.
DSX manufactured components are covered against defects in materials and workmanship for the life of the product.