This is basic, but main fuel adjustment can have a huge influence boost behaviors. I won't pretend to fully understand why, just observed this from adjusting my pump over time. Have you played with the main fuel? From your specs it seems like you are familiar with the setup, but you didn't mention. Even a quarter turn can mean building 10 psi and bottoming out or building 20 quickly.
Backing out star screw (LDA, top of pump) really helped me with low rpm/boost smoke, at with noticeable change to overall power. No matter what power you're making, having that adjusted in fully will make clouds of thick black smoke with no real benefit in my experience.
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1985 744 D24T M46 49mm t3 @20psi 280k
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06-06-2017, 03:56 PM
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