Handheld programmer vs street tune
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
No 2 cars hve the same spark and fueling curves; not even stock cars.
The curve isnt just +5/-5 ror the whole thing. Individual mods make the curves change and its not just a multiplier. To illustrate the complexity, I am posting this chart to show how timing is adjusted by engine load and speed. The shape changes when you tune. You dont just add 5% to the entire curve.
A street tune involves scanning the car and making very specific changes specific to the car being tuned.
The curve isnt just +5/-5 ror the whole thing. Individual mods make the curves change and its not just a multiplier. To illustrate the complexity, I am posting this chart to show how timing is adjusted by engine load and speed. The shape changes when you tune. You dont just add 5% to the entire curve.
A street tune involves scanning the car and making very specific changes specific to the car being tuned.
