Originally Posted by AndrewO1991

there aren't any 92-95 spider injector upgrades. I've looked, the only thing you can do to upgrade them is a custom fuel rail system. One problem i see is the regulator is controlled my manifold pressure (not the map sensor). When under vacuum fuel pressure goes down, closer to atmosperic pressure the pressure rises. I wonder if it would increase more with greater than atmosperic pressure? that would be interesting, lol