The base calibrations done...
The base calibrations done at Edelbrock's R&D center will dial in the system to close calibration on a typical 440. To fine-tune the system at home, all that's needed is this easy-to-master handheld calibration module. It has multiple functions for adjusting timing and fuel. The end result is a complete, easy-to-install-and-tune EFI kit for enthusiasts.
When we arrived at Edelbrock, R&D engineer Doug Stalter had the GTX strapped to the dyno and was working on the base calibrations. This dyno development program resulted in the various fuel and spark maps encoded in the ECU's software for the 440 application. Doug demonstrated the fine-tuning process that can be accomplished by the customer with the supplied calibration module. As we watched what could be accomplished at the push of a button with the electronic engine management system, we were impressed by the ease of tuning changes. Edelbrock has put serious time into the development of these EFI systems; as usual, they've done the homework ahead of time so the customer doesn't have to.
Edelbrock engineer Doug Stalter...
Edelbrock engineer Doug Stalter worked on the calibration, creating the base settings on the GTX's prototype system. This will become the baseline calibration in production units. Here, the basic idle settings are being programmed and will be burned onto a chip. The final chip will be included in all big-block Pro-Flow kits to give the installer a baseline to further tune to his or her individual needs.
The eddy-current chassis dyno...
The eddy-current chassis dyno can be set at any required load and rpm and held there. This is the only way to accurately simulate road load.
Having the car under continuous...
Having the car under continuous load on the dyno allows Doug to tune the part-throttle mixture and timing as he simulates driving down a road.