The Quarterhorse can do I think 4 programs if you wire up the selector. I think it can switch on the fly too.
The spacer is more useful for heat insulation than anything else. It helps keep the upper from heat soaking so the air charge is cooler. The runner length change probably doesn't affect things all that much. You'll need at least a 3/8 spacer to clear the fuel rail anyway.
The spacer is more useful for heat insulation than anything else. It helps keep the upper from heat soaking so the air charge is cooler. The runner length change probably doesn't affect things all that much. You'll need at least a 3/8 spacer to clear the fuel rail anyway.
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