Thanks Shadowman. Is there a way to find out which tune is loaded on the GT? Do you have an upgraded tune and how do you handle all the A/F ratios etc. for the different cars? BTW, I also have the Accufab T/B that was installed as part of the kit.
I sent you a PM because some of the questions asked require more than a quick answer.
However; here is what I can share; all 4000 plus Ford GT's were delivered with the same tune. Does this mean that that the tune was optimized for your gal; “NO”
In fact a typical chain of event would be that during development all ends of the proverbial performance envelope are experienced and then it is based on the collection of data that a baseline tune is created that is sufficient for all of the gals.
This is why many folks with their gal in OEM trim will find that a custom tune can produce a better performing gal because no two gal’s are alike; meaning each engine etc. has a little different character. Now add to this when in OEM trim the process called adaptation is turned on as such the PCM is constantly retuning your gal within the spread built that is factored into the software however when a custom turn is installed for a Whipple, a smaller pulley, and likely the TT gals this feature is typically turned off as such you now have the following;
1. Closed loop operation during which time the O2 sensors and the PCM continue to communicate maintaining a lean best operation and then when you press on the go pedal and the gal goes into open loop (no longer O2 dependent) fixed fuel and timing maps come into play.
2. Most tunes that are offered for the Whipple, a pulley, as well as the TT gals are not optimized for that particular gal but rather a program that was created as the result of data collected over time from many gals as such a quality tune is a living entity; or I should say IMO this is a component of a quality tune. Then add to this the only way to truly optimize a tune for your gal in on a "LOAD" dyno and not on a typical dyno designed for WOT pulls. The later are interesting but do little to tell the whole story; I refer to these as lapel pin dyno's.
Takes care
Shadowman
