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That is correct. The manual says to make small adjustments. It suggests one flat, then redo your test .

Mine has a droop screw on the back under an allen plug.

I like your instrumentation. Does your deuce make black smoke under a load? My next step is going to be adjusting the droop screw. When you are making 11psi boost , is that under an extreme load? Have you ever loaded it at 1600 rpm and checked the boost?

Thanks for the info. On the 1600 rpm check, How do I adjust the droop screw?

My duece seemed a little sluggish when I drove it home. I have changed all the filters installed a pyro 2" post turbo and a boost gage. In my searches it seems like turning the fuel screw one flat has done miracles for others. I had to turn mine four flats before I noticed anything. My pyro on a...