So what do you think of tuning for new tires (quali)


(Dom Callan) #1

In quali, I find that it takes a bit to get the tires to go “off” a bit before I can rotate kart in corners.

Do any of you do anything in terms of setup for quali to counteract the big grip?

(TJ Koyen) #2

Depends on the tire. Different brands change balance differently when they’re new. For example, I usually find new MGs pick up more front grip relative to rear, so if my kart is slightly free on used rubber, I know it’s going to be too loose on new rubber.

You’ve got to listen to your kart though, what are you experiencing in handling when you put new rubber on?

(Dom Callan) #3

Difficulty getting the kart to turn in and then to rotate. As I drive through it, the kart frees up. I’m guessing when I’m in the first 3 laps, I’m slower and maybe I’m just not going hard enough yet.
But literally the kart feels pointy and jumpy on turn in followed by feeling like there’s too much grip in turns. It almost feels like there’s a resistance due to grip.

It could be that I’m setting wheel down early somehow and that’s what I’m feeling

(TJ Koyen) #4

“Difficulty getting the kart to turn in” and “kart feels pointy and jumpy on turn in” are contradicting statements.

It sounds to me like the kart is indeed pointy on turn-in because of the increased grip, and it feels slow to rotate off the corner because you’re letting the inside wheel set down early from countersteering or lifting to eliminate the aggressive turn-in.

Something to do to help the kart feel more comfortable on new tires is to narrow the front slightly or increase front negative camber. This will settle the front down a little.

Otherwise, remember you’ve got a bunch more grip on the new tires, so you’ll have to drive the kart harder through the turns to get it to flex and work properly.

(Dom Callan) #5

Hmm thanks. Yes, the drive harder approach works. Setting the wheel down makes the most sense. You are probably right that I react to the sharp turn in by lifting, braking or something that is setting the inside wheel down, thus making it feel too grippy.
I’ll ask to narrow the front a bit for quali and see what happens.