Hi all, I have just had my NA cosworth engine rebuilt, fully ported head all port matched. Twin 48's. Re profiled cams ( builders spec) 37mm inlet 33mm exhaust, Millington up and over manifold. Titan dry sump. 11.3-1cr. All steel internals. 5mm@tdc. 4mm@tdc cam timing. Ignition timing 16 at 1000rpm , 28 at maximum advance. The big one. On the rolling road last week it made. 267bhp @ 8050rpm 170.1 torque @7000rpm. We did a run up around 9000rpm but no gains were made. How do my figures compare to others with this spec motor.
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