You guys think you've got problems -- just try running a GMS32 on a pipe -- there's just no way with the standard LS needle.

The problem is that even at full thruttle, the LS needle still protrudes into the spraybar -- when the engine is set up for a decent idle/transistion.

I made a new low-speed needle up for mine (it's shorter) so that when the throttle is open, the needle ends up about 1mm away and that allows *much* more fuel to flow.