The so called infamous OP Spark is something a lot of people dread and are afraid of, and for good reason. More importantly, people have no idea how it operates, and how to control it. Attached is a picture that shows several different views. Don't pay much attention to the idle tables, as later down the road I will explain those, and for this demonstration I simply used stock settings for idle in these tables. You'll notice how the Spark Tables are setup, and how smooth they are. You'll then notice how the OP Spark Tables are setup, and how they are not smooth. Then you will notice that I subtracted the Spark Table from the OP Spark table and you will see how that setup is smooth. The idea is to have that portion smooth, then add the spark table too it and then leave it how it is. I repeat, have it smooth, add the Spark Table to it, and leave it. When the Spark Table is removed, those values left over is a torque type demand. There is multiple ways to set this table up, and it will depend on what you, or the customer wants from the tune. If you were to raise these values up too much, you could cause the car to go WOT without you touching the pedal much, which you could imagine, could cause a huge issue. This is the tables you would use to get the Electronic Throttle to match the Pedal demand. CodeNameBill touches on it some when he talks more race application, but these tables are huge when it comes to how you want the car to react to what you are doing with the pedal.
***CAUTION*** ***Air/Fuel Ratio*** PE starts at 60% throttle. This DOES NOT mean 60% pedal, and it DOES NOT mean 60% Electronic Throttle. It takes an average of the two. If the pedal is at 30% and the electronic throttle is at 90%, the car would enter the PE table at the 60% values. If the pedal is at 40% and the electronic throttle is at 100%, it would enter PE at 70% values. You can see how having a vehicle at WOT electronically (throttle blade is wide open) can be a huge issue if you are only commanding a lower PE value. You need to make sure that your PE Table is setup appropriately for your OP Spark Table.
There is actually a lot more smoothing that can happen to the Spark Table, but this is not my typical table. Again I use a wide variety of different tables for what is being expected of from the customer, or if I want my specific car to do something completely different.
I highly recommend trying different variations of the true OP Spark numbers (The OP Spark Table minus Spark Table). If you guys need any suggestions on what to try, just let me know and I'll see what I can do to give you some more things.
OP Spark.jpg
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Originally Posted by cobaltssoverbooster
