Any ideas on how much difference these two things make? Green fury tyres, you can visibly see they're wider than the smooth stretched asphalt tyres, and 7% more pure and 7% more extra pump from a boosted set. I did some tryharding of the Veneno Coconut Grove event in the current Summit, and got 53rd on the PC leaderboard, but it was over 10 seconds slower than the top time, which seems like a crazy gap from 1st to 53rd. I know I'm not as good at the driving as the best players, but I don't think my driving is costing over 10 seconds in just over 2 minutes.
If anyone here has both the tyres and the boosted set and wouldn't mind doing multiple runs with the boosted set and green furies, and multiple runs with smooth stretched asphalt and a non-boosted set, I'd be interested to know how much difference it makes. I can take 7% off my stats if I generate a part with lower stats and make it exact with the icon points, but the difference won't be quite the same as having 7% more. I'll probably still do it to get an idea, but there's nothing I can do to see how much difference the tyres make. I've seen a YouTuber "test" the difference, but they didn't do anywhere near enough runs with each.
Edit: So, I did make a new nitro part that got me very close to 7% less pure and 7% less extra pump. I also changed from the stretched smooth asphalt tyres to classic asphalt. I was only 0.5 seconds slower than my previous best time. I re-instated the full nitro part, but accidentally kept the classic asphalt tyres, and took 0.2 seconds off my previous best time, so 0.7 quicker than I went with 7% less nitro. I then went back to the stretched smooth tyres and couldn't beat my time with the supposedly worse classic tyres.
I watched a video of someone doing a time 7 secs faster than mine, and there was one bit where he might be saving a lot of time, where he bumps the wall after crossing the bridge in a way that both slows him and turns him in perfectly, and that could be saving a lot of time, maybe 1-2 seconds per lap, so I'll have to try that.