Tuning assistance

[i'm boosted]

Hello All,

I finally had a chance to do some tuning since I installed my Supra SMIC. I richening certain RPMS here and there this is what I finally came up with. My mods are up to date and it was about 45 degrees outside and my MBC is set to 20psi. This is on pump gas.


RPM Knock Timing O2 TPS
3125 0 24 0.86 100
3156 0 23 0.88 100
3188 0 23 0.88 100
3250 0 22 0.9 100
3313 0 22 0.9 100
3375 0 20 0.9 100
3438 0 19 0.9 100
3438 0 18 0.92 100
3531 0 16 0.9 100
3625 0 16 0.92 100
3719 0 16 0.9 100
3750 0 17 0.9 100
3813 0 17 0.9 100
3906 0 17 0.9 100
3969 0 18 0.9 100
4031 0 18 0.9 100
4094 1 17 0.9 100
4219 1 17 0.9 100
4250 1 17 0.9 100
4313 1 17 0.9 100
4406 0 18 0.9 100
4500 0 18 0.9 100
4531 0 18 0.9 100
4625 0 18 0.9 100
4688 0 18 0.9 100
4813 0 19 0.9 100
4813 0 19 0.9 100
4906 0 19 0.9 100
5000 0 19 0.9 100
5063 0 19 0.9 100
5094 0 20 0.9 100
5219 0 20 0.9 100
5281 0 21 0.9 100
5375 0 21 0.9 100
5406 0 22 0.9 100
5469 0 22 0.9 100
5563 0 22 0.9 100
5656 0 23 0.9 100
5656 0 23 0.9 100
5688 0 23 0.9 100
5781 0 23 0.9 100
5844 0 24 0.9 100
5875 0 24 0.9 100
5938 0 24 0.9 100
6000 0 24 0.9 100

I see my timing adv drops to as low as 16 and climb as high as 24. I heard that the ideal timing adv is about 15 degrees. Is this true? If so what can I do reduce my timing.

Thanks

Brian

 

[psychlow]

Where did you hear 15* is optimal?

The reason it drops so low in the midrange is because that's where the ECU thinks peak torque (cylinder pressure) is.

As much timing as you can run with no knock is GOOD.

 

[i'm boosted]

Cool. Thanks for your input. I read about the 15 degrees on pocketlogger's website. Also they stated that if the timing advance is higher then you can afford to put the boost up a little.

http://pocketlogger.com/index.php?pid=params&param=timing&type=dsm