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very fine tuning to the fuel maps to get the mixture flat as Kansas.. This is starting off with a performance program suited for the car's mods (just like is used in the ECU upgrades). The programs are well refined and will fall right around that ideal 11.5:1 mixture ratio so long as the car doesn't have an issue. Given that each cars is an individual of its own, there will always be slight deviations from one car to the next with the same program, but gross variations like shown in this post are far from what should be expected. If there is any more than +/- 0.2 A/F from 11.5:1, there is a problem with the car, not the program. This is useful to bear in mind as a customer and useful for myself when tuning - I know that if I have to start making fuel corrections that exceed +/- 5%, it is an indication that there is a problem in the car somewhere. This is because I *know* the programs will hit 11.5:1 +/- ~0.2A/F on a car that has no problems. I also spend a full day going through a car to make sure that everything is absolutely right before going to the dyno. The tuning aspect of the job is really just the icing on the cake - the guts of the ordeal is going through the car to make sure I wont come across a problem and spend tons of money fixing a car strapped to a dyno. Everything documented in the 6 P's and the dyno dissertation is what I provide in my tuning service and the car doesn't go to the dyno until everything is in proper working order. Even still, some problems do come up, such as the turbo wastegates not being tight enough to bring the turbos up in boost when tuning for racefuel or issues with weak fuel pumps not keeping up with the increased demands when tuning on racefuel. Unfortunately these problems cannot always be forseen given that I'm not putting racefuel in the cars prior to the dyno - they are tuned on pumpfuel first and then racefuel added once the pumpfuel tuning is complete. The only thing you can check beforehand is that the actuators have proper base pressure, but that's not always a guarantee.
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