| There's a lot more to the tuning process than just manipulating parameters within the ECU. That process is more like putting the icing on the cake. I spend a good deal of time going through the car to make sure that everything is in spec, such as: Boost leak check, fix
Plug check
Compression test
Fuel pressure test (road test, loaded)
Boost control system check
Wastegate actuator balance check
ECU diagnostics (sensor test, sensor calibration, circuit fault check, etc)
Base timing check
Exhaust system leak check
Injector impedance check
Road test - low, mid, and high load drivability, boost controller test
Tire pressure check
Air filter cleaning
Fluids check ... and a general "once-over" check to make sure all vacuum lines are properly connected, harness connections check (to make sure all connectors are connected to the right sensors/solenoids), etc.... The actual tuning process takes far less time than the prep-work. My ECU programs are already very well refined and for custom tuning it only requires small, if any, adjustments to the operating parameters to make things spot-on.... Chances are, even if you've gone through the car, I will find something out of check. In the Z's I've tuned (in the 300+ range now), I can count the number of Z's that checked out perfect on one hand. The pre-dyno work-up in and of itself has just as much value as the tuning, if not more. I know that once everything is in check, the other half of my job will be pretty much assurred to produce the best results. So long as the car is properly maintained and operated within the boundaries I lay out, one can expect many reliable service miles. The final tune of a build is a step that isn't an option - it is just as important as making sure there is fuel in the tank.
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[ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
Albert Einstein
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