We modify all maps within the ECU. This includes injection maps during acceleration, injection maps at part load, timing maps at part load, and timing maps during acceleration. We also modify full throttle maps as well.
We up the RPM limiter.
We up the speed limiter.
Octane plays a huge factor in tuning. Cars that run only 93 octane will be able to run a bit more timing on the top end. Cars with 91 octane will need to be a bit more conservative.
Current A/F ratio information and updated dyno charts help us determine what we can do with the tune.
Data logs are huge too. If we know that your IAT's, Engine temp, short term and long term fuel trims, etc are all good, then we can push the tune a bit more.
If you can log multiple sensors, then I would like to see:
Vehicle Speed
Vehicle RPM
Engine Load
Engine Temp
Intake Temp
Intake Manifold Pressure
Short Term Fuel Trims
Long Term Fuel Trims
Timing
O2 Voltage
All of this info would be considered helpful if available.
If you guys care, there are great books on tuning at the book store. It will really open your eyes to tuning.
I can honestly say that tuning is the most important mod you can do.
Originally Posted by tom2112
Jerry, thanks for the great response above. I hope InMotion sees this thread and chimes in too.
Can you tell us some of the things that you modify - or should I say account for? (kind of a check list of benefits)
Such as:
Altitude
Octane of Gas available
Redline (RPM limit)
Top speed limit
Throttle map
Fuel map
Modifications (CAI, pulley, etc)
The reason I ask, is I want to know what I information I can tell you (or any other tuner for that matter) that will allow you to tune my car better.
I've seen mention of data logs. Should I send you a data log along with my ECU? Would it help? I have an OBDII connector and laptop with logging software. What readings would you want logged?
Thanks again for your participation in this forum. We appreciate all the info.