I’ll see what I can do.
I see a ton of T shirt ideas in this thread! Here are my 3 favorite:
Kart Tuning: -1 x -1 = 1
Kart Tuning? I’ll go back to aircraft engineering. Its easier.
I dont know why it works, it just does.
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I agree, I don’t mean to diminish the value of traditional engineering and data, I simply wish to warn people not to get carried away.
A practical example. When you run a team with multiple drivers and mechanics you will eventually run across this situation, typically at least once a year. Tire pressure gages. One mechanic will ask another to check a tire and the numbers will conflict. They’ll then start to argue about which is accurate, and then one of them realizes that so long as he’s using the same gage every time, it really isn’t a big deal as every change in pressure will be relative to one another as it’s measured with the same degree of error/offset.
The other mechanic will then start walking around asking every single person he knows to compare tire gages, which only sows confusion and doubt.
Mechanic #1 is using the tool as intended.
Mechanic #2 is lost in the sauce.
I see data as a tool. Use it to inform your decision making/problem solving, don’t try to make it dictate the process. I’ve worked with a large number of really good teams, mechanics, tuners and data guys. I’ve never once run across anyone who just taps on a keyboard and it spits out “the answer”.
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Working on an app that do exactly this that I can sell for big $$$. Push the button and it says “drive better”
Still in beta testing tho…
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Could randomly pick from phrases.
“Fast is smooth”
“Be more aggressive”
“Santa saw your lines, you’re getting glasses for Christmas”
We desperately need a KP branded version of this “Driving/Setup Analysis” tool, that has 20 KP inspired driving/setup sayings inside! 
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I might have to split this topic up now that I’ve derailed it…, but anyway @Ryon_Beachner did a great Supernats Bingo card
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@Muskabeatz I ended up trying to model a whole front end geometry of a kart in Inventor and it made me want to put my head through a wall since it doesn’t understand the relationships Im trying to have for each of the parts.
Long story short, KPI is kind of a non-linear caster adjustment among other things. You can actually visualize it with a business card. Put a bend in the business card near the end, and curve the longer “half” so that its more rounded, like a spindle. You can see that as that bend angle gets more extreme (KPI), the caster of the inside wheel increases faster, and the outside wheel caster kind of flattens out the more the wheel is turned. This works in conjunction with ackermann as you can imagine. Kind of a different way of explaining what @Ryon_Beachner said.
To be honest, I wouldn’t worry about it. It’s really something that should be integrated into the frame geometry of the kart and not really used as an adjustment tool in my mind. I’d be curious to hear what people have to say that have tried the different OTK spindles, but again as @Ryon_Beachner said, don’t get lost in the sauce.
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Yep. Thats about as well put as it can be.
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Mechanics hitting on juniors moms… parent fight at scales… possibly related lol.
Very rarely actually. 
we run the rear width 1400mm all the time, we dont touch that
it will be a long time now for the next test on that track. we didnt have a problem with this strange rebound effect on a different track with these regulations
however we did came to the conclusion that the CRG is naturally very tight/grippy at the rear, we can compensate some of it using weird air pressures but we still havent found the solution to it with the chassis setup itself. i still cant understand why longer hubs feel faster and are indeed faster than short ones though, logic would say its the opposite.
this spring/rebound effect problem is just on this class, where you need a very very loose kart otherwise the engine bogs down like hell, it’s not an OK that it just punches through, it would seem the engine is too weak to overcome the resistance the frame has, so thats why the OTK karts shine, the OTK frames are like gelatin
anyways, we have a lot of stuff to test but we’re getting closer. it will be fun seeing a CRG in front of a OTK-only grid next year lol
edit: we have the front spindle type D (11 degrees) which is standard on crg models
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Good luck, as a fellow non OTK driver I feel you sometimes lol.
Idk if this is the same thing your having but Ive raced in similar conditions, high grip, low hp where you don’t want to engine to bog. Long story short I ended up having to switch to an axle with slightly more grip as a last resort (similar to longer hubs) and it actually ended up being faster. Logically you would want to the kart as free as possible but that change ended up giving more sidebite and the rear just felt more planted instead of having a slight slide and bogging. Not sure but just my two cents as to why you might be liking the longer hubs better even though logically it is the opposite change.
“Not sure why but it works”
-welcome to kart tuning (sometimes)
@KartingIsLife t shirt idea. Ross Bentley has a great line graph of “Motorsport knowledge” that goes from I know nothing → I know everything → I know less than nothing → I realize I have a lot to still learn. Or something to that affect.
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If you can find it, I can make a decent copy
Sent Ross a message, I tried googling and looking on his website and couldn’t find.
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It may not be the same, but this is likely similar. Theres a million variations, commonly known as the Dunning-Kruger curve.
Also, there’s a similar type Ted talk. I recall the point was that essentially, to progress one must fall off cliffs and understand that the falling is the learning.
In short, the act of making changes can and will destroy/break things. This is necessary. Thr falling down is a feature and not a bug.