Speed Limit Cut 5.7 3UR Tundra 2008
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648 Posts
Buy the trd supercharger! You can try and ask the dealership to do it but you shouldn't be going that fast with 6000 lbs!
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32,667 Posts
Hmmm...two birds. :heh:
I know about ABS safety lock, but it would be desirable to keep working capacity of system.
Also I understand that it is possible to cut off a purple wire on ECU.
But I do not want that on the panel of devices failure burnt.
UNICHIP removes restrictions on speed?
Apexi RSM can remove restriction on speed?
Also I understand that it is possible to cut off a purple wire on ECU.
But I do not want that on the panel of devices failure burnt.
UNICHIP removes restrictions on speed?
Apexi RSM can remove restriction on speed?
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1 Posts
2007 Tundra SPEED LIMITER REMOVED!!! As in the Supra turbo it is tied to the stability control but Toyota has learned. You can't just pull the fuse anymore. You have to put a switch on the first speed sensor that controls the speed control. The sensor is located on the right side rear of the transmission above the clip that holds the rear o2 sensor plug. After you use the switch three times the stability control is disabled and I don't know if it comes back on if you disconnect the battery. I personally hate the feature anyway so I've never checked to see if it comes back on with a battery disconnect. This also does not disable the speedometer or odometer but a fault is stored in the computer so if your truck is under warranty disconnect the battery before going to the dealer, also the highest speed will not be erased and will show when the dealer plugs into your truck even if you battery has been disconnected. If you get into a wreck, law enforcement will also know how fast you were going and will probably consider this a illegal modification. So this is my disclaimer and now the good stuff.
2007 5.7 Tundra runs out of gear at 130 mph in 4th and is drag limited at 131.635 in fifth. Fifth gear is to high; with supercharger maby 145 mph. In the ram srt 10 top speed is 156 mph but it is almost out of gear in the YouTube videos I've seen. Our trucks gearing is set up for fuel economy. In fifth our trucks are at 4400 rpm at 131 and at 6000 rpm, our red line, the truck will be going 178 mph. If we could up the RPM to 6500 it would do 142 easily in 4th stock. When it hits the rev limiter at 130 in 4th, the truck just sits and bangs on the rev limiter, we just need more rpm or maby 4:56 rear and then maby it could accelerate in 5th but this is a big maby. After experiencing the truck at speed, it will probably need 550 hp to the wheels to break 155 with stock gearing and that translates to 660 hp to the crank with 20% to 22% loss that our truck have because of the heavy Aisin transmission Toyota adapted from their Hino medium truck division. And FYI this truck is a fat pig at 130 I can only imaging 150.
I used my laptop's GPS to get the speeds because as you know our speedometer only go to 121 mph. Also my truck is a TRD Off Road 2WD DBL Cab with 4:30 and 285/60/VR18 with a tire diameter of 31.5 If you have a 4:10 rear end your truck will go approx 136 mph in 4th but probably only 120 in fifth.
2007 5.7 Tundra runs out of gear at 130 mph in 4th and is drag limited at 131.635 in fifth. Fifth gear is to high; with supercharger maby 145 mph. In the ram srt 10 top speed is 156 mph but it is almost out of gear in the YouTube videos I've seen. Our trucks gearing is set up for fuel economy. In fifth our trucks are at 4400 rpm at 131 and at 6000 rpm, our red line, the truck will be going 178 mph. If we could up the RPM to 6500 it would do 142 easily in 4th stock. When it hits the rev limiter at 130 in 4th, the truck just sits and bangs on the rev limiter, we just need more rpm or maby 4:56 rear and then maby it could accelerate in 5th but this is a big maby. After experiencing the truck at speed, it will probably need 550 hp to the wheels to break 155 with stock gearing and that translates to 660 hp to the crank with 20% to 22% loss that our truck have because of the heavy Aisin transmission Toyota adapted from their Hino medium truck division. And FYI this truck is a fat pig at 130 I can only imaging 150.
I used my laptop's GPS to get the speeds because as you know our speedometer only go to 121 mph. Also my truck is a TRD Off Road 2WD DBL Cab with 4:30 and 285/60/VR18 with a tire diameter of 31.5 If you have a 4:10 rear end your truck will go approx 136 mph in 4th but probably only 120 in fifth.
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32,667 Posts
Hello brother. Can you clarify the phrase "use the switch three times"? Do you mean break the connection and then remake it while the truck is moving? A second or two is sufficient?
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