I regret not doing the Doc B when I rebuilt my built engine. I've spun bearings multiple times. I run the car hard and live within 40 minutes of US129 (The Dragon) and take it up there often. I've spun bearings three times up there. One of which was my built engine. That was before I had the AWR. I haven't been up there since rebuilding and installing the AWR, but I'm still kind of reluctant. I'm sure it'll help, but I don't know if it will remedy the oil starvation through sharp left hand turns. I don't necessarily want to be the guinea pig. I run 4k+rpm at all times while I'm up there and some of the turns are long, sharp lefties. Two of the times I spun a bearing was in the same corner and of course my wheel spoke blocks my oil light perfectly through the turn. I now just carry my speed through that turn, off the accelerator and idling the engine. I would consider my driving up there to be equivalent to tracking it though. I only run up there in the winter to avoid bikes and tourists and will often spend 4-6 hours driving back and forth and it's only 11 miles long. Sometimes I have to pull over to give my clutch a break because it'll start slipping after 3-4 runs, so I'm at it pretty hard. With that being said, I've also spun bearings on other various back roads throughout Tennessee, but it's ALWAYS through left hand turns. I am well aware of the oiling deficiencies of the FS engine, so the oil is always full. Actually, I will usually run ~.5 quart over full to possibly combat it, but it's never helped. So, in short, yes, I'd get the Doc B.
