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2015 Eight Stack Fuel Injection | 500 Borla Drive Johnson City, TN 37604 | MADE IN THE USA

Eight Stack Installation Guidelines


This page will be updated frequently to ensure proper installation of the Eight Stack system.


To ensure a successful installation of the Eight Stack fuel injection system it is imperative that you are sure to be working with a mechanically sound platform. Eight Stack fuel injection is not a Band-Aid for a mechanically unsound engine nor will it work miracles. The Eight Stack system will take a healthy and properly matched engine to even higher levels of performance and looks! However, if you choose to install the Eight Stack on a worn out, broken engine; you can be assured it will at least look cool!


The Injection installation process

1. Be sure your engine is in proper running order. Perform a compression and leak down test to ensure your rings, valves, valve seals and the latter are in functional and proper working order.

2. Ensure your electrical and charging system is working properly. Modern electronic fuel injection systems are designed to run on at a minimum of 12volts. Having voltage drop and charging issues can be detrimental to the health of the engine management system used by both you and your tuner.

3. PLAN AHEAD. Speak with your installer about your vehicle and what it will require for proper installation. This would include ignition prerequisites, fuel system requirements, and chassis grounding. This is a very important step in the process! Each vehicle platform is different and some may require more drastic changes than others. The last thing you want during a build is a surprise that you were not expecting. Shop and dyno time is costly and you surely don't want to have your project down longer than needed. A well planned build will keep you aware financially of the undertaking and make you aware of how long the process will take and its involvement.



Prepping your vehicle

1. Carefully remove your old intake system, distributor and associated linkages and set them aside.

2. Clean and prep your engine bay for the installation. Clean all gasket surfaces, remove any debris from the intake valley. Inspect all components visually for any excessive wear. If you have a 'wet' intake meaning coolant runs through it; it is a good idea to drain your oil after removal to ensure no coolant made its way into the crankcase that may harm your bearings.

3. Test and trial fit your components! Some engines and associated parts may have been decked, resurfaced, or may use an uncommon combination of parts. Make sure everything will clear and seal when gaskets and RTV is in place.

4. Make sure the gear on the distributor you are using is matched properly with your camshaft. Certain cams will require a harder or softer gear depending on the type. If you are unsure please contact your engine builder or system installer.

5. Ready the fuel system as per your installer's requirements. This will vary from system to system.



Installing the Eight Stack Injection

1. You should ALWAYS consult your tuner/installer before proceeding further at this point. Due to the variance in systems and needed wiring; some installer may request this part be done In-House to ensure a proper installation. Please reference your included instructions and your Eight Stack dealer for assistance.

2. Assemble as you would your intake manifold traditionally for the application. Proper gaskets should be used as needed and adequate use of high temp automotive RTV on the china walls of the block if necessary.

3. Reference your installation instructions for throttle body assembly and or adjustment based on application.

4. Install your ignition system and or distributor per your tuners requirements.

5. Plumb and connect your fuel system per your installer’s requirements or leave this to the installer/tuner.

6. Reinstall your throttle linkage or make adjustments at this time



Electronic Hookup and Tuning

1. As with the fuel system; this part may be best handled by your tuner/installation expert. Now may be the time to transport your vehicle to the tuning shop of your choice if needed. It is HIGHLY recommended this only be completed by trained professionals and tuned safely on an engine or chassis dynamometer.

2. Tune and Enjoy!



For more detailed information about your specific application; please contact your installation house or tuning specialist for your platform. The safest bet to ensure a flawless installation is to work hand in hand with the above as they know your platform best!