Im only giving suggestions on your 11:51 lap... And ill try to find my PR 1:33(I think it was) lap and post it up tomorrow... I dont think I deleted it from my Gamin, but I might have. And these are only suggestions as its hard to see with PDR video exactly how close you are to the edges.
Please dont take my critique as anything more than trying to help you get better. And some of the stuff my car will do, your car will not and vice versa.
Turn 1: get further right to the curbing then get onto the left curbing at the apex. There is a small channel between the asphalt and curb that will grab your drivers tire and hold it. You are also WAY over braking and braking to early IMO. I am taking that turn @70mph and I know my car will take it at mid to high 70's... you are 55mph. Im guessing you can gain 10-15mph on that turn if you start wider in the right curb, damn near run over the apex curb and let the car track out.
Turn 2(bus stop)... braking early again IMO. Brake later and harder. Try to get your eyeballs to pop out! Turn in later. Turn the 2-3 into a straight line towards the left side curbing just prior to turn 4(aim at the start of the curbing). Run over that 2-3 curbing with driver then passenger tires. And keep that straight line to left side track out. Look at the track map to visualize what I am trying to tell you. In your PDR video you can see all the rubber deeper into turn 2...
Turn 4: try to come right and take that tight instead of wide. If you can hold it, its faster. The wide to tight you are doing is what most instructors teach because its "easier" but its not faster. Then stay right towards the little section of right curbing before turning for 5.
Turn 5: You are turning early into 5 IMO. You dont even get towards the right curbing at track out at all. You are down on speed quite a bit. I think you are over braking 5 because your setup isnt far enough right after 4. Its a fast transition off of 4 into 5.
Turn 6: maybe over braking a little bit, but otherwise looks decent. Get further right into the curbing before entry and at track out you will only hit the last 1/3 of the curbing if you are carrying enough speed. The apex IMO is about where the big drain or whatever it is. I think its a little later apex. If you spin off 6 there is tons of run-off... Ive probably seen more people go off 6 than anywhere else.
Turn 7-8-9: get a bit further right before 7 into the curbing then try to make that 7-8 a straight line. The entry to 7 has a like 2x3 ft. tar patch... drive over it or even a little left... Once you crest 8 and come down the car will put some G's on and you can lean into the brakes as the track transitions for the uphill to 9. The big tar patch into 9, try to stay inside of it or at worst put your drivers side tires on it. When you come out of 9, stay left, dont try to drive back right immediately, you have a long straight to setup to the right side. The bump at the bridge isnt bad at speed(I know thats why you are trying to come right immediately). You can see the curbing for 10 as you come out of 9, aim for it.
Turn 10: I think you can wait just a fraction longer before turn in and maybe start just a bit further right into the curbing. Some people will tell you throw away the first apex(I think you do that), track out towards the middle(you didnt track out much, try to get closer to the access road crossing), then come in hard to apex the second turn and then track out right and hammer down the straight.
Those are my little critiques. I think you are over braking and not carrying the corner speed mostly, which with such little time in the car isnt a surprise. A few different line choices if you can hold them. And attack the curbing... im a whore though that likes to work the curbs...
Let me see if my PB is still on my Garmin from last September and ill upload it.
Edit: Ive got my 1:33 lap on my Garmin and its saved, but I cant get it off the Garmin on my macbook. Ill do it on my PC in the morning. Watching it though I can see a few things I can do to go faster.