Now, they set a trap that is a set distance between a mph block and the 660 [foot] block that calculates your speed; you get an eighth mile (660) mph and E/T, it's going to tell you how fast you're going.
And then obviously the finish line, which gives you the same thing as the eighth mile, which gives you a mph as well as a finish line number [ie, quarter mile time.] All those incrementals break down to data for you, and we do what we call "split numbers." A split number may be from 660 to 1,000 feet; we calculate how long it took us to travel that amount of time and we use that as a tuning aid. For instance, between 60 and 330 feet, you may have somewhere in the neighborhood of a 1.90-something [second] travel time. An average 330 might be somewhere in the 3-flat second range or 2.90, versus your 60 foot being a 1.0-something, so you calculate that time it takes you to get from A to B. Then we'll look and say, okay, we're in 1st gear, 2nd gear, 3rd gear at this point, and it's lacking somewhere between 330 and 660. Then you look and say, OK we're in third and fourth gear in there, so we may try to adjust the throttle map and give us a little bit of a change. Then we look at our air/fuel ratio and wheel speed, and you try and use your data to say, "OK, we're lacking in this department. It might be a little rich or lean, and make gear changes as well as overall map changes.
And then obviously the finish line, which gives you the same thing as the eighth mile, which gives you a mph as well as a finish line number [ie, quarter mile time.] All those incrementals break down to data for you, and we do what we call "split numbers." A split number may be from 660 to 1,000 feet; we calculate how long it took us to travel that amount of time and we use that as a tuning aid. For instance, between 60 and 330 feet, you may have somewhere in the neighborhood of a 1.90-something [second] travel time. An average 330 might be somewhere in the 3-flat second range or 2.90, versus your 60 foot being a 1.0-something, so you calculate that time it takes you to get from A to B. Then we'll look and say, okay, we're in 1st gear, 2nd gear, 3rd gear at this point, and it's lacking somewhere between 330 and 660. Then you look and say, OK we're in third and fourth gear in there, so we may try to adjust the throttle map and give us a little bit of a change. Then we look at our air/fuel ratio and wheel speed, and you try and use your data to say, "OK, we're lacking in this department. It might be a little rich or lean, and make gear changes as well as overall map changes.
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