The porting configurations I am advocating for the upper and lower intake manifold are targeted for maximum power under the curve from 4500 – 7300 rpm for a daily driver with a 7AT. Making the manifold passages larger may increase peak power, but probably sacrifice some mid range power. That is not to say that mid range power will not be increased by increased passage size, but it may not be increased as much as if the passages are cleaned up without enlarging cross sectional area.
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Ecutek | DIY HR350 upper plenum | DIY ported lower manifold | TurboXS cbe | FI rhfc
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