Does anyone remember what color the largest orifice (0.20) of the three included in the kit is?

The current orifice I'm using is already at its lowest allowable FP setting and I need to lower the FP's at the rail a few psi's lower.

I just dug up the remaining parts and the two unused orifices are black and silver. The three port sizes are .10, .15, and .20.

I know I could always disassemble the FPR to find out for sure, but I've partially shaved one side of the diaphragm to clear the strut tower brace and because, at it's deepest point, I've shaved down to where you can just see the bottom of one of the six or so screws that holds the top half (diaphram) to the bottom half of the FPR, I would prefer to not disturb the structural integrity before I know for sure whether I already have the largest orifice or not.

A-dub

 

Alright, so I've found the info regarding the color coding on the orifices (discharge ports). Goes as follows:

Black: .100"
Silver: .150"
Gold: .200"

Great. Now, the down side to this is that it confirms that I'm already using the largest orifice. According to AEM, their FPR's are designed with the range of 20 psi min. to xxx psi. max. of any high performance pump. However, I'm already seeing 30 psi static (vacuum disconnected and capped) with the adjustment set screw backed all the way out.

I've read about one guy who couldn't lower his FP's, but he was using a smaller orifice and didn't have any others. He got his brother to drill out the existing orifice to create a larger port. But even then, a .200" bit was used.

Aside from that, with so many variations between cars, parts, setups, and settings, I haven't heard of anyone having trouble lowering their FP's specifically with AEM's FPR (stock FPR's or crappy B&M's withholding). Okay, assuming AEM meant, for the sake of simplicity, 20 psi. idle pressures and not static? Still, I'm reading 29 - 30 @ idle with everything hooked up.

So what could be keeping pressures up?

A-dub