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"When watching a F1 engine on a dyno, do you see exhaust flame out the exhaust during a power pull? No. You do see it during coastdown overrun. So fuel can definitely be ignited by a hot exhaust system, but why do you only witness it on a dyno during overrun?"
I believe you only see during overrun because of the pressure wave/pulse causing fresh air to be introduced into the pipe thus igniting the unburned fuel.
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87 GN
9.52@147.82
Getting there.
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