According to SR20DE gurus Mike Kojima and Clark Steppler, the air/fuel ratios that we’re seeing on the Dynojet are invalid. So, we welded an oxygen sensor bung onto our header to see how the a/f curve looks on our Innovate Motorsports wideband. You can see there’s quite a big difference at full throttle around 4000 rpm, at least a half point, the differences are similiar across the board. Further buggering up the typical sniffer type A/F ratio testing, our car still has a catalytic converter, which acts as an oxygen source.
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