Stock boost is 8 to 10 psi. It may be spooling up slowly up to the 3k rpm point, or the start wheel under the AFC housing is up pretty tight and its taking the full boost to push the diaphram on top of the pump down to allow that little extra bit of fuel. I would do the boost gauge first to see where your at, if your getting the boost down low but it doesn't really pull untill higher rpms, the air is there, the fuel is not. Adjusting the afc housing and grinding that pin will help with that, along with turning in the main fuel screw. Make sure you read up on doing that, and do it with the engine running. Also have the idle screw loose so you can back it off and keep your idle as you adjust the main screw in. At the level your trying for, I would expect about a turn in or so will add the power your looking for, but every pump is different, it will be guess and test.
Jason
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