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6th gear and 5000rpm? you must have some nice open roads to go that fast! hahahaha
I heard that an engine that breathes better (exhaust or internal mods) will make it more efficient, and allow it to process more air that the supercharger builds up under pressure before the intakes. Might not be the best explanation, but you can google around for something better.
I will be installing the radium fuel pump kit this week I hope. Aeromotive fuel pump though, not walbro. Should be quiet. Not sure if just a fuel pump would need a re-tune, but since I did my pulley too, I will definitely need a re-tune. The VT2-500 injectors should be strong enough.
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