[Jeff Chambers]

I recently tuned a 1999GT with single turbo kit making nearly 700RWHP with nothing but the stock G3GZ computer and an SCT XCal2. Some shops are reporting more than 1100 RWHP out of Ford GT's with the stock computer system and SCT tuning. I don't think anyone is saying that PDR needs a standalone system at this point. The point that I was attempting to make is that the stock EEC-IV SD system has limited tuning opportunities in today's world and that if he's dead-set on staying SD, that there are SD-based systems out there that are more than capable.....although at quite a cost.

I was looking at the DA1 box code last night (87-88 SD Mustangs) in my SCT software. It can be tuned through the VE table, however there is little else in the base files that will let the tuner address the driveability factors. It does give access to the base fuel, VE, basic spark and injector values though. This would be enough to hammer out a basic tune but it would be difficult and time consuming to tune it for the most of the driveability characteristics that people have the most problem with. The hardest part would be tuning each cell of the VE table (10 rpm cells x 8 MAP cells) without having the benefit of a data logger. That's where systems like FAST really shine through. You can head out on the road (or on a loaded dyno) and hit nearly all the cells capturing commanded vs. actual data, then drop the results right over the top of your base tables for immediate correction. A FAST XFI system runs pretty close to $3k though.