Jdm Governor - Mazda MX-6 Forum
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post #1 of 20 (permalink) Old 4-18-04, 21:31 Thread Starter
 
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Jdm Governor

I was trying to figure out EXACTLY which wite to cut from the ECU to take the governor off. A picture would be great, or exact directions. I've heard it hasta do something with the speedo, but which wire is that the runs into like the 50 wires into the ECU? and info would be great...
thanks

THE JDM IS UP AND RUNNIN!! NICE!!!

age 17.. FULL JDM ENGINE SWAP... NOT BAD... WHAT YOU THINK?...

"Speed doesn't kill, It's the sudden stop that does"
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post #2 of 20 (permalink) Old 4-19-04, 1:09
 
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I am not too sure about the ZE if it has a rev limiter or not. I know that the 03 does. But I wouldnt know how to disable that. Why would you want to?

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post #3 of 20 (permalink) Old 4-19-04, 10:54 Thread Starter
 
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there is a speed governor a7 i think 115mph... for the JDM ECU that i heard... just wanna kno how to take it off... i heard you have to cut a wire but i dont kno which one..

"Speed doesn't kill, It's the sudden stop that does"
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post #4 of 20 (permalink) Old 4-26-04, 0:20
 
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I Don't Remember Where Or When But I Read Somewhere That The V6 Us Edition Was Governed 'til 134mph If I Recall Right. But I Can Tell You For Sure That At Least My 6 (us Edition) Ain't Governed To 115mph 'cause I Had Take It To 130mph.
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post #5 of 20 (permalink) Old 4-26-04, 10:46 Thread Starter
 
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i have a jdm ecu and a klze...

"Speed doesn't kill, It's the sudden stop that does"
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post #6 of 20 (permalink) Old 4-26-04, 16:09
 
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ECU Question

Hey Zoom do you have a pic of your ecu and also when you installed it was it more so just plug N play???

D.
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post #7 of 20 (permalink) Old 4-26-04, 18:28
 
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The ZE does have a rev limiter, around 7,800 - 7,900ish.

But this guy is talking about the speed limiter. Basically all japanese cars are speed limited to 180kph from the factory.

I have gotten around the problem by the ratio of my tyres in my unique situation, basically what the ECU thinks is 180kph is actually 260kph, but that's another story.

The speed sensor wire goes from the sensor on the gearbox, then goes towards the speedo, and essentially spilts there. It then continues to the ECU.

If you unplug the sensor (nice and simple) then you will have no speed governer, but you will also have no speedo. The trick is to find the wire that goes from the sensor to the speedo, and then cut it where it goes to the ECU. It is best to do this behind the dash so you can put a switch in the wire. That way you can turn the signal to the ECU on and off.

The reasons why you would do this is because a lot of ECU's use the speed signal to decide if the car is moving or stationary and run different fuel and ignition maps to suit. So you would normally want the wire connected.

Subaru's actually go into a limp home mode or shutdown completely if they detect the car isn't moving but the engine is under load.

1968 VW Baja, KLZE engine, I'll whip you all, on the sand www.offroadvw.net
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post #8 of 20 (permalink) Old 4-26-04, 21:00
 
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Quote:
Originally Posted by Zo0m Zo0m Mx6
there is a speed governor a7 i think 115mph... for the JDM ECU that i heard
You heard? So you haven't even gone close to 115? What kind of tires do you have?
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post #9 of 20 (permalink) Old 5-1-04, 12:42
 
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Ive gone right up to it on the highway and it makes me sick Ive been studying Haynes diagrams till my eyes pop out but I still cant find the wire....Why this information is not commonly available I dont know...Baja Wes exp. was the most enlightening thing Ive seen on the topic....now please someone help out here...

OH and more importantly what tires are you running really fat ones that throw off the ecu?...Cause that can cause problems with the differential as the car will think one wheel is always spinning....but if ypou do prescribed step ups in tire size its more safe for the ecu....SO if you do a prescribed step up to say a 215/45/17 tire and wheel will that throw it off?
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post #10 of 20 (permalink) Old 5-2-04, 1:35
 
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You can throw the car off by changing the tire sizes making it think it is going slower than it really is. http://www.miata.net/garage/tirecalc.html Play with that tire calculator.

What I meant by asking what kind of tires is what kind of speed rating do they have? H rated tires are rated for 130 mph. Not saying that if you hit 130, they will blow up, but there is a reason they rate these things.
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post #11 of 20 (permalink) Old 5-2-04, 3:43
 
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I spoke about tire sizes because I am running 31x10.5" R15 mud tyres. My KLZE is in the back of a rear engined VW Baja.

I checked with a friend (KCV6 on this forum, KLZE in a KC Laser), he says;

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To disable the 180KMh speed limiter, disconnect pin 1M (VSS I/P). This can be accomplished non destructively i.e without cutting the wire. The back of the loom end connector un-clips and the pins pull out quite easily. This way if there is a problem, you can simply re-insert the pin.

My car runs fine without this pin connected.

A smart approach would be to cut the wire and run it through a switch. This way you can select between dangerously fast and insanely fast (you young fellas).

1968 VW Baja, KLZE engine, I'll whip you all, on the sand www.offroadvw.net
www.taylorcycles.com.au - My DH MTB racing brothers shop.
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post #12 of 20 (permalink) Old 5-2-04, 19:53 Thread Starter
 
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ok... now where exactly is PIN 1M (VSS I/P) located at? I don't want to pull the wrong wite... Does anyone have a picture? or a diagram of some sort?

THANKS BAJA

"Speed doesn't kill, It's the sudden stop that does"
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post #13 of 20 (permalink) Old 5-20-04, 14:34
 
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Hey guy's I guess i have a special mx or something but my ze and everyone I know's ze has no limiter anywhere I've seen my peg on 8000 not on purpose and I've also seen the spedo at 150mph as far as it goes hmmm
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post #14 of 20 (permalink) Old 5-20-04, 17:48
 
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All Japanese domestic market vehicles made since the late 80s are limited by Japanese law to 180kph.

If you are running the american ECU, or a fake J-spec ECU, then you will not have the speed limiter at 180kph. If you are missing a wire to the ECU or someone has cut it then you will not have the speed limiter. If it is a true J-spec ECU then it will have the limiter.

And any ECU should have the rev limiter. Rev your engine in neutral, foot flat to the floor. You will see it has a rev limiter, and I have not heard of one at 8,000rpm or above. If it was then the ZE tacho would show rpm above 8,000rpm, but it doesn't.

1968 VW Baja, KLZE engine, I'll whip you all, on the sand www.offroadvw.net
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post #15 of 20 (permalink) Old 5-21-04, 12:46
 
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On my ze I watched it actally fall to the bottom of 8000 rpm and I've also seen with my own eyes I was driving my spedo read 150 mph
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