what exactly does this do. hp? torque? Gas mileage? throttle response?

 

All of the above.

 

 

Now if only I could find a dealer willing to do it for me.

 

wwhat all is involved in doing it

 

I had it (timing adv.) done and now have a slight detonation at around 2600k rpm. My factory setting was 14 btdc we went up to the max of 17 and there was alot of det. We then backed down to 16btdc and there didn't seem to be any more det. but lately it has returned. I use premium fuel for what it's worth. Any help would be app.