In general, you can run more timing on an iron than alum head. Use the same plugs as the E7's unless you have P heads as they require a different plug. For Nitrous, go at least 1 step colder and check the plugs for signs of detonation. If memory serves me right- ASF32-C for the GT40 is one step colder than stock ASF42-C.
For most N/A, you are in the 12.5- 13 range. For a nitrous car 11.5-12. 14:1 IMO is too lean for a nitrous car. You can run rich all day long, but lean once. Lean + Nitrous + detonation= BOOM
For most N/A, you are in the 12.5- 13 range. For a nitrous car 11.5-12. 14:1 IMO is too lean for a nitrous car. You can run rich all day long, but lean once. Lean + Nitrous + detonation= BOOM
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