If your asking if fuel pressure is affected by your timing, then no it isn't. Some engines can take more timing than others though, I know mine, when it was stock didn't like anything (ping) over 12, but I have friends who could run as high as 16-17. All with premium fuel of course.
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Good luck!
Brad R.
1992 L.X. 5.0 coupe
MODS: A few little bolt ons 
New Best time ...11.60 @ 128 mph @ 2000+ ft altitude.
Rice Haters Club member #39
Users rides #2542
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