Quote:
Originally Posted by delviacv2
I will drive to to work tomorrow just for testing purposes  |
Give it some time and take notes.
I not only look for off idle throttle response, roll-on power (like 45 mph to 70 mph for example), smooth acceleration, but I also listen to the motor. I noticed with the RC, too much timing (S1 = 3 or higher) adds a bit a rattling to my engine. This was at idle and at a certain RPM between 1700-ish to 2300-sh rpm. It could have been poor fuel too, which tells me I need to be conservative - you never know what your gonna get. So, listen for anything out of the normal from stock. If something doesn't seem or sound right, go back one click. Just because the CEL doesn't come on, doesn't mean the setting is safe for your motor. CEL means it busted an ECU parameter which means it was a significant event.
I am now at S2=0 S1=2 and really like it. It's quiet, powerful, torquey, smooth idle and acceleration. For my car, this one works well. The economy has dropped nearly 2mpg, but I think that's me driving a lot more aggressively
EDIT: My term "timing" above means when the fuel is introduced to the cylinder. On a diesel we use fuel - on a gas motor, we advance the spark. Too much timing (adding the fuel too early in the combustion cycle) will cause the fuel to ignite too soon - that is, well in advance of top dead center. The result will be the combustion will try to push the piston down before the crank and piston are at top dead center, and add lots of heat in terms of exhaust gas temps (EGT). This is very hard on the tops of pistons and rod bearings. If you listen, you will hear your motor tick, or tap or rattle. In a gas motor, this is pre-ignition or detonation. Either way, this is bad and will shorten the life of your motor significantly.