Originally Posted by BonneMeMN
Bad nitrous shot?
Maybe something collected under there, _then_ went bang later; i.e. a little more than the usual charge was in there when it ignited. Notice how the right-side edges of the break look like they're curving upwards? That looks like some serious detonation. Bet the driver'* ears are still ringing...
Years ago I had a '79 Dodge Diplomat, one of those old MoPars with the resistor on the firewall that would kill the engine if it burned out. In my case it wasn't burned out, but one of its two connectors was loose, so the ignition would cut in and out over bumpy roads. Took forever to find the problem.
So anyway, I'm cruising along at 60 mph one day and go over some railroad tracks. The ignition cuts out for like, three seconds or so, _while_ the engine is still spinning, pumping the exhaust full of unignited gas mixture, etc. After three seconds the ignition resistor cuts back in, the plugs start firing again, and ***POW***. Everything in the exhaust blows at once. Biggest bang I ever heard, and I'm sitting right over it. Somehow the exhaust system stayed together and the car kept going. Dunno what the guy following me must have thought...