Quote Originally Posted by chituntang
I believe that most of the car that use a computer to control your car can do some form of timing adjustments. But if your ecu is designed to run 87 max, then it will not advance the timing anymore. Let's say you run like a B18c. If you rung 87, it will retard the timing so much your engine would run like ****.
Very good, man + however many points my greens are worth are worth nowadays. I'll add on to it. All cars nowadays use a computer to do the most advanced thinking of the things we take advantage of. The computer uses sensors to monitor various systems. Dealing with fuel and timing issues, most advanced engine control systems use a knock sensor to listen for detonation. depending on how loud the knock is, it pulls enough timing to keep you in the safe zone and usually when the computer pulls timing, it adds fuel. And that's not usually a good thing. The computer has a preset program in which if it hears knock, it will add fuel and pull timing to keep the combustion chambers from overheating. Usually, if a car was designed to run on high octane, it's because the chamber can't spin the air quick enough at higher speed to make the power it's supposed to make at it's peak power rpm on regular unleaded. Regular unleaded burns quicker than Premium. That's kinda the short of it. There's more to it than just that but that's more or less the basics of it.