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Turbo sizing...T4, 13BT SP, 9.4 rotors.
my needs for my hill climb car necessitate the need for a better than stock turbo. Something of a T4 variety.
BUT i am looking for fast spool. Like seeing full boost by 2500 rpm territory. Given a 13BT street ported engine with 9.4:1 rotors, what would allow me to achieve this goal? a divided T4 would be good im sure. But there is not much available in divided for both turbos AND more importantly, manifolds.
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