Originally Posted by 70GS455

It appears the atmospheric reference port may hold a promising option. In some boosted applications, the fuel pressure regulator is boost referenced, meaning that fuel pressure rises with boost in order to offset having to overcome the increasing boost pressure inside the manifold. This is a simple way to ensure proper injector fuel delivery with varying boost/vac inside the manifold. Another way to accomplish this is with injector duty cycle, the program inside the computer handles compensating for varying levels of boost/vac. But if we were to take hostage this atmospheric port and apply boost pressure (with a check valve so that it doesn't go negative with vac) to it, now we have accomplished increased fuel delivery with increasing boost. It may be a solution to prevent going lean, assuming of course we don't exceed the fuel pump's capacity. Comments? Any experimenters?