advanced timing, anybody else doing it? Options

[6strngs]

so, after having read about how advancing the timing a couple of degrees on this car can make a difference, I decided to advance mine. took only a couple minutes and my timing was set at 15 degrees BTDC. my idle now sits at about 900-950 as opposed to about 750 like it's supposed to be. but when I started driving I felt the difference right away! it's not uber dramatic but it's noticable. especially in the low rpms, from like 1-4K, and it feels like the normal power drop at 5500 isn't as sharp, I mean, it's still there it just doesn't feel like it drops as sharply. I'm running 91 octane gas with and I didn't feel/hear any detonation, even when I tried to put the car under load by riding it 4th at 1400 RPMs I didn't notice any. I'm thinking of either going back out and setting it to 16-17 or just using 89 octane. anybody else done this?

[Bitter]

hmm, the idle speed shouldnt have been affected at all. did you reset the PCM when you did this or bump into anything else along the way?

[6strngs]

hmm, the idle speed shouldnt have been affected at all. did you reset the PCM when you did this or bump into anything else along the way?

here's a quote from mr2oc.com: "This is one reason a lot of people tune there timing by ear, you listen for the highest rpms while adjusting the timing more advanced." I think the idle rpms are supposed to increase with advanced timing. I didn't reset anything or touch anything else when I did advancement. I just pulled the jumper wire out while the engine was still running and immidietly went for a test drive. I'm wondering if resetting the ECU will also return my timing back to stock?

should I go back and re-adjust my idle speed to 750? do you think it makes a difference?