Speed Limiter - Page 6 - Toyota Yaris Forums

racerb · 03-24-2011, 04:14 PM

Quote:

Originally Posted by Bluevitz-rs

simply cut the wire going from the speedo to the ECU and you're free to speed away and you still have your working speedo. You will have a CEL though.

This is the exact same solution to the limiter issue on the early Celicas, in fact the wire is marked SPD on the ECU main plug!

racerb

*Astroman* · 03-24-2011, 04:42 PM

That might be cool if you could turn it on and off with a toggle switch.

CTScott · 03-24-2011, 03:48 PM

I made a device similar to the greddy one and it works for fooling the ECM to avoid the speed cut out (verified on the bench, not on the street). The speedometer value is incorrect once the limit is passed (it remains at the speed that I am feeding to the ECM), which in my case is 115 MPH.

I also made one for the rev limiter, but am afraid to test it on a live engine.

cali yaris · 03-24-2011, 04:26 PM

Quote:

I also made one for the rev limiter, but am afraid to test it on a live engine.

If you set the rev limit to LESS than stock, you should be fine to test it.

CTScott · 03-24-2011, 05:01 PM

Quote:

Originally Posted by cali yaris

If you set the rev limit to LESS than stock, you should be fine to test it.

What is does is send a modified tach signal that indicates that the engine is spinning at a different speed than it really is. I am afraid to test it in either direction (telling it is is spinning faster or slower).

cali yaris · 03-24-2011, 05:09 PM

^ Gotcha. Do it anyway.

just kidding

CTScott · 03-24-2011, 06:10 PM

Quote:

Originally Posted by cali yaris

^ Gotcha. Do it anyway.

just kidding

I really need another Crashy to be able to do potentially catastrophic testing on.

racerb · 03-24-2011, 10:27 PM

Quote:

Originally Posted by CTScott

I really need another Crashy to be able to do potentially catastrophic testing on.

At what RPM does the stock rev limiter kick in? If it's anything like most FI factory systems, there is about a 200-500 RPM window above the point where it kicks in to safely rev the engine. Back in my Auto-X days, I raced a 1989 Civic Si, it's factory rev limiter kicked in around 7,000 RPM but the engine would free rev to around 7,200-7,400 and come back for more abuse!!

racerb

fnkngrv · 03-24-2011, 06:26 PM

I would like to have the limiter disabled only for those times that I am taking it for official timeslips, etc once I have my turbo installed.

03-24-2011, 04:42 PM	#2
Astroman Modded Moderator View User's Garage Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007 Location: Wenatchee, WA Posts: 3,670	That might be cool if you could turn it on and off with a toggle switch. __________________ Please visit my online store for computer stuff and Official Yarisworld decals!

03-24-2011, 03:48 PM	#3
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	I made a device similar to the greddy one and it works for fooling the ECM to avoid the speed cut out (verified on the bench, not on the street). The speedometer value is incorrect once the limit is passed (it remains at the speed that I am feeding to the ECM), which in my case is 115 MPH. I also made one for the rev limiter, but am afraid to test it on a live engine. __________________

03-24-2011, 05:09 PM	#6
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ Gotcha. Do it anyway. just kidding __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

03-24-2011, 06:26 PM	#9
fnkngrv Mr. 155 and climbing View User's Garage Drives: Seriously Modded 07 Sedan Join Date: Jun 2006 Location: In The Hotbox Posts: 4,742	I would like to have the limiter disabled only for those times that I am taking it for official timeslips, etc once I have my turbo installed. __________________ Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing *Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes.*

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