To tweak one of the base tunes follow Holleys section 3.3.2, Creating an Initial Calibration in the Step-By-Step Beginners Tuning Guide (found in the Help menu).The process for building a base tune from scratch is explained in section 2.2.2, Creating an Initial Calibration in the Experienced User Tuning Manual (also found in the Help menu).You can find a complete listing of the included base calibrations in the Help menu (Help Contents Base Calibration Information).Each has a brief description, and they are separated into TBI and MPFI base calibrations.
![]() A Global Folder has the following discrete files at a minimum. Build the tune on the laptop that will be used with the vehicle. The objective here is to get you comfortable with the software, navigating it, etc. Save your tune in the Custom Cals folder to make it easy to find later.). This brings up the SYSTEM PARAMETERS box in the left column. As an example, 83LB Holley 522-838 will automatically trigger the low-impedance setting in the Injector Type selection in the INJECTOR SET 1 box. In addition, you need to provide specifics as to which type of cam sensor you have and how youd like the ECU to trigger the ignition system. All of the other sensors in the software are also set to default to the Holley sensors we used in the installation. Since we began with a tune that was originally developed on the gas scale, we converted the existing values to E85 values using a Lambda multiplier as shown in the math below. You can achieve smooth transitions from cell to cell by highlighting multiple cells, right clicking, and using the Fill Column Values and Fill Row Values functions. The software also offers advanced settings that can be made to the fuel settings to improve startup, eliminate bogs on throttle transitions, etc. In addition, the software allows you to enrich the mixture based on coolant temperature andor air temperature as well as during acceleration and deceleration. Finally, you can also fine-tune that rate of change of enrichment with respect to numerous variables. Round up to the nearest tenth to make the mixture leaner; round down to make it richer. There are many additional FUEL SETTINGS, but for now, we can leave them as is from the tune were tweaking. ![]() From that data, you will enter values in the table that coincide with what you ran at idle, cruise, and WOT. Later, we add some timing in the idle and drivability areas to improve the burn of the mixture, improve fuel economy, lower exhaust temperatures, etc.). X-Tunes Code LAB ToYou can learn more about this book HERE and use promo code LAB to save 35 off your order Click here to learn more.
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