Swifties...how accurate is your Qualcomm at recording over speeds or critical events?

It was the worst kept secret at the Go Kart track....

 

Nope, its the tires. When you have new rubber there is more tire to turn at the same RPM, thus you will go faster. As your tread wears out you will slow down. I have seen it several time in various trucks.

 

I noticed it after my new steer tires and drives were installed. I thought it was the tires but it sounded crazy to me. As soon as they were changed I got the speed increase.

 

That's it.

I'm demanding a new set of tires at our B service this week.

 

It doesn't take much thought at all.
If your tires have a larger circumference (which happens with 1 inch of new tread) you will travel farther with each revolution of that tire.

 

True about the circumference but I figured the governor would account for the change in speed somehow although I have no idea how our trucks are actually governed. I figured it was governed by computer that would cut back the truck at 62 regardless of new tires.

Either way, I like my new tires.

 

I'm not sure how the governor determines truck speed.
If it is the gearing then it would probably be engine RPM or something. If so, new tires would have a speed advantage over worn tires.

 

It goes off of a sensor on your output shaft.
one of my owners had a bad one and it gave her a bunch of exsessive over speeds.
she got the part fixed and no more over speeds.
the govener goes off of rpm. The shop can program in different tire sizes(tall rubber)

 

So basically when I got my tires replaced the shop didn't program in the new size from what it sounds like. Works for me.

Good info. I wasn't aware it went off the output shaft.

 

No...they don't reprogram them when you get new rubber. If they did you would be in once a month as your tire wore down. They program in an average amount. You go quicker when they are new, closer to 62 during most of the life of the tire, but when tread wears down to minimun you may barely be going 60.