I finally found some time to investigate the knocking noise that developed in the Cobra during the last session of the track day I was at almost exactly 1 year ago at Little Taladega. My 12 year old son was bugging me to fix it, so with his help this past week we found that it was a bent exhaust valve caused by
oil starvation during exhuberent cornering. I have a Canton road race pan but hadn't gotten around to installing the Accusump. Seems the exhaust valve heated the bronze guide and galled the valve stem until the valve would not return, then it got smacked by the piston. Piston looked OK, so new valve guide & piston. Buttoned it up last night but didn't start it beacause I had to let the RTV gasket for the intake manifold dry. Then had to leave at 5 AM for the airport. Hopefully I can start it Friday night when I get back to town. Can't wait to go "Cobra-ing" again...