GOVERNER
Senior Member




Scion Justice League of America
SL Member
Joined: Apr 2005
Posts: 5,594
From: Portland, Oregon
It's not a governer...
It's a rev limiter, which you DO NOT want to remove.... The tC is geared to max out at that speed and pushing RPM's past that point will toast your engine in no time.
The only somewhat safe way to go past 128 or so is to change the gearing of the tC, which hasn't been done yet....
and AM piggyback can remove that limiter, but is pricey and not worth it just for that purpose... if you are doing some major F/I or N/A work, then it makes sense, but otherwise... no way.
If you don't mind me asking....
Why would you want to go past 130 in a tC anyways? you won't reach that on a quarter mile, and on most road courses... the only place you could do it is on a large oval track - Plus to run that quick consistently, you need better brakes/tires/suspension/cooling/and safety equipment.
It's a rev limiter, which you DO NOT want to remove.... The tC is geared to max out at that speed and pushing RPM's past that point will toast your engine in no time.
The only somewhat safe way to go past 128 or so is to change the gearing of the tC, which hasn't been done yet....
and AM piggyback can remove that limiter, but is pricey and not worth it just for that purpose... if you are doing some major F/I or N/A work, then it makes sense, but otherwise... no way.
If you don't mind me asking....
Why would you want to go past 130 in a tC anyways? you won't reach that on a quarter mile, and on most road courses... the only place you could do it is on a large oval track - Plus to run that quick consistently, you need better brakes/tires/suspension/cooling/and safety equipment.
Its there for a reason.. and here are a couple that manufacturers can chose from (cause they all have them in the US)
1) The car is nearly at redline... allowing you to run a small amount faster (which is all you will get) will allow you to trash your engine
2) Cars are designed with a certain set of aerodynamics. Certain cars were known to become airborne enough to either completely leave the road, or were dangerously unstable at higher speeds. Keep in mind... a car does resemble a lift body in certain ways.
Unless you are doing the right work to the car, and running on a long track, there really is no point... but if you must, get an emanage. If you need to ask how, pay someone to install it for you. Messing with the ECU settings is not something you want to dive into without knowing what you are doing.
1) The car is nearly at redline... allowing you to run a small amount faster (which is all you will get) will allow you to trash your engine
2) Cars are designed with a certain set of aerodynamics. Certain cars were known to become airborne enough to either completely leave the road, or were dangerously unstable at higher speeds. Keep in mind... a car does resemble a lift body in certain ways.
Unless you are doing the right work to the car, and running on a long track, there really is no point... but if you must, get an emanage. If you need to ask how, pay someone to install it for you. Messing with the ECU settings is not something you want to dive into without knowing what you are doing.
There is actually more than a rev limiter. There is a speed limiter and a rev limiter. The rev limiter is set to about 6250 rpms I believe, and the speed limiter is set to 127. I wouldnt touch either without doing the proper work first.
Originally Posted by WeDriveScions
Didn't know there was a speed one too.... learn something new all the time....
HAHA... beat you to it anyways!

HAHA... beat you to it anyways!
they have an ECU setting for everthing nowadays! Before long they will regulate how often you can make u-turns or put decibel limiter in the cabin for the stereo
What I hear most and agree with:
If you have done enough work to the car and have the driving skills needed to reach past 130 in the 1/4 or on a track, then you already know how to remove the limiters.
If you have done enough work to the car and have the driving skills needed to reach past 130 in the 1/4 or on a track, then you already know how to remove the limiters.
Originally Posted by engifineer
Originally Posted by WeDriveScions
Didn't know there was a speed one too.... learn something new all the time....
HAHA... beat you to it anyways!

HAHA... beat you to it anyways!
they have an ECU setting for everthing nowadays! Before long they will regulate how often you can make u-turns or put decibel limiter in the cabin for the stereo
the tc cant go mutch over 127 any ways unless its an auto they have a higher final drive also if you want to do it cheaper a apexi rsm will do it thats how i did min but i dont realy see a point since going that fast on the street or express way is dumb and there is no way a tc running the stock ecu will go that fast in the 1/4 mile or on a real race track
and thats why i sold my rsm
and thats why i sold my rsm
no speed limiter on the scions.
it is all power/gearing/aero that stops our cars from doing more.
get more power, you'll increase the top end potential.
i have yet to see a stock car hit the rev limiter in top gear... just not enough power to get there.
once you have enough power to hit the rev limiter in top gear, then you can worry about changing gears...
it is all power/gearing/aero that stops our cars from doing more.
get more power, you'll increase the top end potential.
i have yet to see a stock car hit the rev limiter in top gear... just not enough power to get there.
once you have enough power to hit the rev limiter in top gear, then you can worry about changing gears...
on the TC there is because i have a supercharger and it is done at 129 mph at 5200 rpms in 5th gear and you can not do anymore. it is an electronic shut off that takes you back down to 123 mph.
Originally Posted by dgHotLava
no speed limiter on the scions.
it is all power/gearing/aero that stops our cars from doing more.
get more power, you'll increase the top end potential.
i have yet to see a stock car hit the rev limiter in top gear... just not enough power to get there.
once you have enough power to hit the rev limiter in top gear, then you can worry about changing gears...
it is all power/gearing/aero that stops our cars from doing more.
get more power, you'll increase the top end potential.
i have yet to see a stock car hit the rev limiter in top gear... just not enough power to get there.
once you have enough power to hit the rev limiter in top gear, then you can worry about changing gears...
Originally Posted by aacordon
Hmm.. the speed limiter is at 127? ive done 132 b4 on the freeway racing my friends G35. he said he was tailing me at over 130 as well. Best way is to try to go high speed with low rev.
The speedometers and odometer on.... modern cars, are calibrated from the factory with a plus 1-2 percent error. This means that actual speed or recorded mileage is actually lower than that indicated on the speedometer and odometer.
Some organizations, when testing out cars, will examine speedometer/odometer error. Here are 5 models tested in 2001:
Subaru Impreza WRX 3.2%
Ford Focus 2.1%
Chrysler PT Cruiser 1.07%
Toyota Condor 2400 1.54%
Volvo V70 T5 0.14%
There is absolutely 100% a 127 mph electronic limiter... scion themselves even state that. Dont know why someone would get the idea there is none..... I have NEVER seen a late model car in the us without one. It is not gearing. Do the math and you will see that the tC can do a little more than 127 before redline. The auto also will not go over 127 because it has the same limiter, regardless of final drive.


