speed limiter
Super Moderator
Joined: May 2001
Posts: 11,851
Likes: 2
From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
Iago is right on the money
The Speed limiter is there for insurance purposes, and product liability purposes.
#1. The stock tires are only H rated. So they give up the ghost at 130 MPH, so Hyundai set the speed limiter at 125. Your speedo may read higher or lower by as much as 10% (so it could read 147/148 even though you are only travling 125 mph when the limiter kicks in)
#2. Insurance reasons. The lower the speed limiter is set to, the cheaper the insurance is.
I posted the instructions some time ago, It was a white wire with a black stripe if I remember right...but don't quote me on that until I dig out the diagram again.
The car dies when coming to a stop because the ECU knows the difference between your foot off the gas with clutch in, and your foot off the gas with the clutch out. How? By the speed. If you rev your car up to 5000 RPM in 2nd gear, then push in the clutch and coast....the rpms slowly drop. If you sit at a stop and rev to 5000 RPM, then take your foot off the gas, the RPMS's quickly drop. WHY? The ECU is keeping the RPMS up to make it easier for you to shift. It knows you are rolling (speed sensor), so it keeps the RPMS up. Without that signal, the computer always thinks you are just sitting there idling, even though you are not. So when the motor is placed under load...it dies, because the computer was not expecting it. When your motor dies...you lose power sterring and power brakes. NOT A GOOD THING as you approach an intersection.
I removed the instructions some time ago, because I didn't want anyone losing sterring and brakes as they approach a busy intersection. The switch is a good idea...untill you forget to flip it back on after your top speed run....
I will NOT post up instructions again...but I will post up the wiring diagram and identify the wire. What you do after that is your own decision.
The Speed limiter is there for insurance purposes, and product liability purposes.
#1. The stock tires are only H rated. So they give up the ghost at 130 MPH, so Hyundai set the speed limiter at 125. Your speedo may read higher or lower by as much as 10% (so it could read 147/148 even though you are only travling 125 mph when the limiter kicks in)
#2. Insurance reasons. The lower the speed limiter is set to, the cheaper the insurance is.
I posted the instructions some time ago, It was a white wire with a black stripe if I remember right...but don't quote me on that until I dig out the diagram again.
The car dies when coming to a stop because the ECU knows the difference between your foot off the gas with clutch in, and your foot off the gas with the clutch out. How? By the speed. If you rev your car up to 5000 RPM in 2nd gear, then push in the clutch and coast....the rpms slowly drop. If you sit at a stop and rev to 5000 RPM, then take your foot off the gas, the RPMS's quickly drop. WHY? The ECU is keeping the RPMS up to make it easier for you to shift. It knows you are rolling (speed sensor), so it keeps the RPMS up. Without that signal, the computer always thinks you are just sitting there idling, even though you are not. So when the motor is placed under load...it dies, because the computer was not expecting it. When your motor dies...you lose power sterring and power brakes. NOT A GOOD THING as you approach an intersection.
I removed the instructions some time ago, because I didn't want anyone losing sterring and brakes as they approach a busy intersection. The switch is a good idea...untill you forget to flip it back on after your top speed run....
I will NOT post up instructions again...but I will post up the wiring diagram and identify the wire. What you do after that is your own decision.
Senior Member
Joined: May 2001
Posts: 263
Likes: 0
We do not have a limiter on ours but I was just thinking you can fool the signal(same as piggy ECU's). To keep everything working OK you find out the voltage of the signal at which it cuts power, you can also measure it but be careful!. Then, if the reading was x mv then you could supply a signal of x mv max (even at 140),wouldn´t that solve it? If it makes sense, look for someone that likes electrical stuff and talk to him about it, it might.
