I don't know if this has been mentioned, but HKS makes a speed limit controller that can disable the factory speed limiter. It says it's universal but I don't know if it's been tested on a TC.
http://www.horsepowerfreaks.com/view...trollers~.html

Or maybe I'm just a dummy, but I thought it was interesting.

 

Also, what about reseting the ECU? Just disconnecting the battery cable for a while and pumping brakes. I heard that someone did that and it stopped the fuel from being cut. He said it went from 127 to about 148 (he thinks) at 5900 rpms.

Can someone confirm this? Very interesting "upgrade".

 

dude unplug the fuse for it................yes its there look through the manuals.

 

i got excited cause I thought there was a fuse for the rev limiter
but yes, there is an ecu fuse

 

no your right.............i was reading the manual one night before i even bought the tC and there is a fuse for the limiter. its not in the main ecu either............at least i think that what i read. ill look through it again and see if its right. might be for something else but i saw limiter and a fuse for it and thought speed limiter.

 

Definately check into that.

Does anyone even know yet what color on the ECU the speed sensor wire is? I installed the Apexi RSM-GP on my tC and it has a speed cut defense system built in. Just need to tap the correct wire.

 

there isn't a TRAC fuse for the speed limiter like there are on older cars like the JZ supra engine. it's programmed into the ECU, the only way around it is a piggyback or reprogrammed ECU, I'm not sure if that will work or not but Scionspeed is working on it and they are very close to a solution.

oh, and the theoretical top speed of gearing on a manual is 139.4mph with stock tires. auto is 163.7mph @ 6247rpms but you would need OVER 340whp to overcome drag to get up to those speeds.... the Scionspeed stage 3 turbo ought to be able to do that... here's a pic I stole from another forum, property of Zoltiz

 

so autos have a higher top speed than me..... interesting.... bet i still hit my peak before they hit the same speed

 

^^^that would actually be interesting to see, we all know the the 5 speed has a faster 0-60, but who has the faster 0-140 ......or better yet 0-160....oh wait.....you guys cant go that fast.

 

And neither can you, nor will your auto tC ever be able to.

 

Why do you say i would never be able to do it, you can do anything with enough money. Ill i need according to the guy is 340 whp, which the other guy with the scion tc running the turbo has already achieved and surpassed. So dont be so quick to say that ill never be able to achieve 160, because it is do-able.

 

Yeah. It's do-able.... but how long do you think the syncros in that auto are going to last with 340hp to the wheels?

 

To be truthful, i have absolutely no idea whatsoever!

 

anyone figure out how to take off or adjust this rev limiter???

 

I saw a product advertised on spike tv this weekend... It plugs in like an error-code reader but then you can reprogram parts of your cars computer.

i think they specifically said the top speed.

 

hrmmm im just tired of running threw 1st and 2nd gear and hitting the limiter.

im used to having my old bmw that i could go ALL the way threw redline. where the TC just hits the line and limiter kicks in...I HATE IT!

 

Just out of curiousity, WHY are you trying to go past the rev limiter? It's there for a reason, you know. Are you trying to blow your engine? You do realize you are past the optimum shift point in terms of the power curve.

Unless you are doing forged internals or other internal engine mods that could handle an increased redline, you're only causing unnecessary damage to your engine.

 

^^^ what are the optimum shift points on a 5 speed tC? just curious.

 

About 6K-6.2K, it should drop you to about 5K-5.5K which is just about at the top of the powerband.

 

thanks