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what is the best spark plug to run with twisted wedges? how much timing do you think i can take. my heads have been milled .040. thanks
 

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I run autolite 3924's gapped @ .050. I run 18* timing using 93 octane. 18* works best for me compared to 14* cause I gained 1.5mph just by bumping it from 14*. Remember though I have a factory A9L comp which is better than the stock sn95 computers.
 

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By "better" you must mean that its factory setings include more timing and hotter fuel tables. Because the SN95 EEC-IV computers are actually better at learning and adapting to different things as they run.
 

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I meant better overall tune. Actually though I never heard anyone ever mention an sn95 comp being good at adapting to engine mods. In fact I always read about guys saying how their cars are surging from cam installs and how they are pinging w/ stock timing on stock motors.
 
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