I'll second that. 19#ers would be a better match for your combination. However, you already have them and you also have a new MAF calibrated for them so changing back to 19's wouldnt be cost effective. Your money would be better spent on a custom chip (not a one size fits all "box chip") that can take out fuel. You can then put the pressure at 39psi where the injectors have the best spray pattern. You didnt mention what your A/F ratio was on the dyno. He does have a wideband A/F sensor, doesnt he? of course thats just my opinion, I could be wrong.
andy
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