Originally Posted by WAR HORSE
so you have to down load software into a laptop in order to use x4 as a decent Data Logger ?
Yes, and from there I have access to every reading possible. I can check throttle position, air flow, fuel pump, injector flow pulse and voltage, MAF numbers, vehicle RPM and speed, battery voltage, I can check and compare both banks, and about 200+ other things.
I can use the tuner as an interface and have full access to my laptop while it is in the car and get real time readings. I can also plug the SCT S4 into the car, do a data log, then upload the information into my computer. Once that is done I can replay the graph and study the numbers. I can compare engine load, RPM, intake air temp, throttle position, the injector cycles, find any engine misses, check actual coolant temps, exhaust temps, and the other 200 different diagnostic readings displayed through the OBDII port if I want to.
The nice thing is that I do not have to suffer through information I don't want. I can select what I want to monitor.
The tuner in itself is a nice tool to have for uploading canned tunes. When you have the ability to know how everything is reacting then you no longer need to settle for a canned tune. Every engine is a little different.
When I was drag racing I looked like a weather station. I had gauges set up in my pit area to read barometric pressure, sea level, humidity, wind direction and speed, and temperature. As the weather changed throughout the day, so did the tune on my bike. It was never anything drastic, but tuning is rarely about making huge changes. You are tweaking things in small increments in order to get the most out of the air and fuel being sucked into the cylinders. Consistency wins races. Adjusting something as small as a few ounces of tire pressure can mean the difference betweeN winning and losing.
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