Here's my race: in qualifying I didn't get a great lap in, but it was still good enough for pole. In a qualifying practice I'd managed a time .4 faster than the pole lap. CJ got a better start than me and we both went deep into t1 and held position with him in front. From the practice I mentioned before, I knew I had the pace advantage, but the dirty air was preventing me from getting a good run out of the key corners.
One lap i made a mistake going onto the back straight, which allowed welsh to be close enough to pass me into t1 just after. I didn't fight welsh much after t1 and then had a small moment and dropped back a little. i then decided that I'd see if welsh was able to pass cj, but we just maintained order. Welsh had a poor exit from the chicane at one point, so I used the opportunity to repass him into t1 and hoped to have another go at passing cj. At about this point I found where I'd been losing out compared to my practice times (T4 and final corner exits).
Welsh pit just after and was lapping very fast, as I was informed on the team radio at the time. That let me know I'd miscalculated the crossover point, but I stayed out since cj was my closest championship rival at that point. Welsh then got damage and had to pit. I pit shortly after that with 2 laps of fuel left, after remembering that Jomas was now on the softs.
Knowing that CJ's softs were going to be slower than warmed up mediums and that he usually puts in more starting fuel than me, I had to go as fast as possible on the outlap to make an undercut and warm up the tyres. Out of the dirty air it was much easier to drive, and I was back to hitting my practice laptimes. CJ's shorter stop meant that despite gaining close to 2 seconds on him on my outlap, he came out right in front of me. I knew he'd still have cold tyres for half the outlap and had to pass as soon as I could. CJ covered the inside of t1 to block a cutback, but that left the outside open for me to take advantage of and get through on traction. I just had to hold my position on the outside until the t4 exit and I was ahead.
Finally free and able to run my own pace, I extended the gap while CJ had issues with grip on his mediums. Jomas made his way past CJ to second, and was steadily catching me. He gained less once the gap got under 2 seconds, and for a couple of laps the gap would stay around the 1-1.3 mark. I lapped Bandit into the chicane, and you know the rest...
Personally I only felt the dirty air effect when I was in the slipstream, which is why I've been referring to that 0.7 gap which slipstream takes effect within.