timing
Retarding the timing *can* reduce emissions under certain conditions, but it will definitely hurt both the performance and gas mileage. The *ONLY* reason to retard timing is to stop spark knock.
I think you got it backwards. Advancing the timing will give you more power. Your engine should already be 10 degrees btdc. I wouldn't advance it more than 13 degrees btdc. If you do, you will start to spark knock.





