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Svt head flow ratios?

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  • Svt head flow ratios?

    Hi,i'm just thinking how much will flow stock svt heads.
    I have ported svt-heads, and i think, is these enough to 270hp. (3,0 block, regrinded cams, 70mm tb, all svt intakes, stock valves, maybe megasquirt)

    I have removed valve guide ends in channels, because those heads have very long valves, so valve guides are long enough. Then they dont interrupt gasses flowing through heads.

    I know that it's not the most durable thing to port heads in everyday car, but i drive maybe 4000km in a year. And it is effective, no race car use those guides that comes in to channels.