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Lorenfb Lorenfb is offline
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Join Date: May 2003
Location: Manhattan Beach, CA
Posts: 2,352
One of the best posts (TimT) describes how a perfoamance chip and mods
should be developed/tweaked":

"When we set up cars on a dyno, we first tune for AFR, we get the AFR somewhere between 12.5-13.5 for maximum potential power.

Then we go back and adjust timing at each load site. Timng is adjusted to provide max torque at each load site.

For example we run the car to 3000rpm, then dial load into the dyno. then while holding at 3000 rpm the timing is adjusted to the point where max torque is seen, then begins to fall off. The timing is then backed off to the point we found max power.

If you have a system with a knock sensor installed you can leave the timing at the point of maximum power. If not to give a margin of safety we back the timing off a touch from the instantaneous max we observe."

The proper way it's done. Great isn't it! Simple & very logical. No guessing here.
Jack Olsen could probably squeeze a little more out of the 3.6 using this approach.
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Old 01-23-2004, 09:24 PM
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