Well, car, schedule, weather, and a lowest traffic Sunday lined up for another go for top speed. 0430 wake up to get to the optimum flat, straight autobahn of about 60 mins distant.
Unfortunately, not successful...car accelerated wonderfully until 194 mph where it laid down twice...minor and then more significant after hitting 196. Second slow included oil on the windshield from the now-designated, "oil-leak-indicator-hole" in the hood.
Fortunately, it wasn't sufficient to cause any roadway issues...pulled off and noted spray originating from the aftermarket catch can:
Later inspection showed some oil in the supercharger (less than OEM, but expect close to zero):
and:
Catch can revealed 50 ml in 500 miles of driving (likely most of which was the last mile at 6800 rpm!):
Data showed knock - which was likely the first laydown (minor) and then oil on the belt which drastically reduced power with a drop of 12 psi to 9.
Positives: engine survived 6800 rpm for extended period at 740 CHP and got me home to live another day.
Negatives: 6800 rpm seems like a bit of a ceiling. And ruined my follow-on visit to the Nurburgring on a perfect weather day.
Ted suggested I run better fuel...which I can do. 98 RON is easily accessible at ~$4 gallon. Shell also sells 102 RON, but at three times the cost...~$10 a gallon! But certainly worth it to find its topspeed.
I leaned forward a bit with a new, slightly shorter belt (for more tension) and even a new Griptec pulley in the same diameter to freshen the belt grip (miles will wear the pulley smooth).
Car is rock solid at speed even with -2.5 degrees of negative camber up front. Very impressive Chevy product!
