You have to change your stock regulator to one that uses a rising rate based on a boost source after the TB. This way you can adjust for lower or higher fuel pressure when needed, especially under boost. Sometimes at idle too you can drop the fuel pressure too to lean it out.
For instance if you are at 45PSI of fuel pressure when not in boost, a 1:1 regulator will add 1psi of fuel pressure for every pound of boost. So at 25PSi your fuel pressure will be 70 and not 45.
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