LS Advanced Igniton Timing

After getting home last night I thought I'll try adjusting the ignition spark timing, an idea of got from some Mazda guys. After finding my jack does not fit under the car anymore I built a little ramp from 18mm MDF stacked 3 high. Ripped off the drivers front wheel and went to work.

This is a $0 mod that alters how long in advance the ecu sends spark to each plug. Playing around with it can improve efficiency, yield around 2 or 3 kw and push you quicker through the rev range but you can slightly retard to help stop pinging (to run on 91ron) and better low range torque.

Before - Looking at the standard sensor through the drivers front wheel well (the black sensor being held by 2 8mm bolts to the right of the silver pipe bend)
http://grotechlandscape.com/myprofil...e/DSCF0365.jpg

After with sensor moved down.
http://grotechlandscape.com/myprofil...e/DSCF0369.jpg

The movement of the sensor from the middle position to the outer extremities is around +/- 4 degrees. You should be using at least 95RON No Etho to be on the safe side but a lot of people in the US are using the equivelant 91 RON and finding no probs.

Anyways my findings:
There is a slight loss of torque in the bottom end of the rev range 1-2500rpm but not much to notice. The power delivery is a lot smoother now mid range and the tacho catapaults quicker from 4500 to 7000rpm. Quicker to the speed limit? Yes

I am slightly disappointed with the loss of bottom end but the car is at 3100rpm when cruising along the freeway at 110kmh. For $0 the only thing lost was the 15 mins.

BlackLS reccommended?
Yes except if you tend to use the torque lower down over power higher up.