Great video with the 911! Each of you were faster in different sections, so it made it entertaining. It looks like you were pushing pretty hard to keep him behind...more understeer than in the Buttonwillow video.
Not to be critical or discourage you from posting the videos, but there are two criticisms I would have from the videos that were not really covered in the other comments...
1. In the Thunderhill battle against the 911, at 8:15 where the 911 is on the outside entering turn 14, you defended a bit too aggressively. Aside from your squeezing the 911 to the outside of the track before corner entry, the 911 was fully alongside at corner entry (actually, even a bit more than that) so was entitled to racing room on the outside line. You were unfortunate in that there was another car on the inside line, but I think you should have stayed behind that car rather than move to the outside line. Philip in the 911 was being very careful and recognized that you were pushing wide, but if he had stayed alongside, not only did you move into the space that you should have been giving him as racing room, but you went in to the corner so hot that you nearly went off the outside of the track and would have forced Philip off track had he not dropped back. Anyway, mistakes happen and it appears that you were cooking the front tires pretty heavily trying to keep the 911 behind you, which may have resulted in more understeer than you expected there, but I wouldn't want someone to see that and think it is good racing etiquette. In endurance racing, where you have another car that is evenly matched or just slightly faster, it is often better not to fight too hard for the position but rather to tuck in behind and let the other driver do the hard work (and take the risks) of opening a line through traffic.
2. In the Sears contact with Donuts, recognizing that there is a certain reputation associated with that car, I do think you were at fault in that contact. You cannot expect Donuts to leave you room at the apex unless you are fully alongside (door-to-door) at corner entry. You were fully behind Donuts at corner entry and by the apex only got your nose up to (into, actually) Donuts' door. It looks like Donuts may have overflowed at the apex, but you were still too far back and given the massive speed differential between the cars, I don't think the driver ever expected you to try to repass (which is fairly pointless as he was no-doubt running 10+ seconds per lap faster).
Anyway, really enjoyed the videos and hope you continue to post them as they are educational for people to see how a relatively underpowered car can still turn fast laps and be competitive in Lemons. Hoping your next car will be a Class A machine!
Harry
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Cerveza Racing