5 days ago Lets_Go_Blues posted a question about the factory boost control restrictors (not boost jet, but the other jets). I had the same question and found the following explanation The Factory Boost Jets which explained it well. I couldn't respond to his post as it is now locked. Hopefully Lets_Go_Blues notices this and maybe some others will learn from it as well.
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90 300zx TT 13.285@106.08 (old stock turbo set up) 94 Camaro Z28 13.751@101.83 03 WRX 13.973@94.88 02 Mazda MPV; four kids and a wife don't fit in the Z. 90 240sx (sold) 16.9@87
Follow Ups
Factory boost control explained. - Rocket man20:27:11 05/15/12