Fun time on the dyno and also my dumb mistake....

[john42]

very cool. for reference, how much of a gap was there between the body and side pipe? The body caught fire?

It was touching. Yes it caught on fire.

[JJK]

any idea on the minimum safe gap? I am sitting at about 1/16" and now concerned.

[john42]

any idea on the minimum safe gap? I am sitting at about 1/16" and now concerned.

Don't take my word for it but after this experience I would think almost any visible gab would be enough. The lengths that it took to, to actually catch fire was. #1 the body was touching the exhaust for a length of about 2 inches. #2 running on the dyno had zero airflow on the exhaust as the fans were pushing air into the front of the car. #3 running at 5000-6000 rpm long enough that the exhaust was beginning to turn a faint pink. Real world conditions those 3 will never all be true at the same time. After it occurred we put fans on the sides blowing air across the exhaust and had no further issues. I cut/clearanced the exhaust yesterday (2 days after the dyno day).