SCT Tune Timing Question

95strokerPSU said:

I just checked my timing for the first time since I got my car SCT tuned and it looked like it was at 8*. I called the shop that did it and they said they set it to 10*, which I believe, I couldn't really see it all that well. My question is does that seem right? I guess I figured they could probably get more timing out of the car, but maybe I'm wrong. When I get the car back together, should I just reset it to 10* or should I try advancing it a little?

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It would seem to me that the focus of their efforts in optimizing your spark curve would be in the pcm spark tables.

The spark values in the pcm are based on the dizzy being set to the factory value of 10.

If you have ever seen a spark table, all those values are the actual value. If you have your dizzy set at anything over that stock setting, the additional amount needs to be added to those table values.

Even though you can't see the spark table values, I did want you to be aware that dizzy adjustment may or may not be desirable.

Example: Say they had your spark at the highest value that made the highest power. You add 4 at the dizzy. That may cause a loss in power.

Hope this makes sense

I'd use 10 at the dizzy to start with.

Grady