I am about to start self-tuning my 03 coupe with a utec after I install my mrev2 and turboxs tuner. How much HP is to be gained with timing advancement on an NA application? Just wondering because if its like 1-2 hp I might not be so inclined to mess with timing, however if there is potential for 5-10hp it might be worth it .

would a good satey net be just to advance it by +1 and be done so if the ecu is asking for 24 degrees of timing advance and i tell utec to step it up to 25, or should I just just push it to 26, 27,28 untill utec detects knock?

 

I did see a gain from advancing the timing but only way up top. Like @ 5000-6000 rpm.

i leave all my tuning to my tuner......but if i learned one thing it is be very conservative with the timing.

 

If the motor does not need the timind, dont add it.The only way to see if it "needs" the timing is to do a pull on the dyno and start adding timing 1-2 degrees at a time.If it does not make power, then leave it out.

 

The amount of ignition advance necessary to create peak BMEP at 16-17 degrees ATDC varies with individual fuel sensitivity [and spray temperature] and inlet air and head temperature. Temperature affects the burn rate [flame speed]. Fuel is not homogeneous and varies from injector spray to injector spray creating scatter plots around the optimium.

What is right for peak on a dyno is usually too much in the real word because the dyno doesn't fully represent real acceleration load [as the dyno accelerates faster than the same vehicle on the road....in quarter mile].

Whats works in 1st/2nd gear is usually too much for 4th/5th/6th.

Knock sensor software reaction is not instantaneous but contains time constant ramps.

The problem is one cylinder always is the first to knock so without individual cylinder sensing and control [individual fuel and ignition maps] you are always compromised to the worst case.

http://www.mitsubishi-motors.com/cor...004/16E_04.pdf