Turbo ute.

[Cobra]

ok Mondie ... put your therapists cap on mate ..... :lol:

driving along a country road at night .... no street lights but a 60 zone ..... the beast is dying to race off in the cool of the night .... I harness her back to 60 .. no biggie ..... then on the opposite side of the road (about 200m up the road) I notice headlights coming on .... I cruise by at 60 .... I notice the headlight belong to a police car ...

I cruise on for the next couple of kilometres at 60ish .... then lights and whistles come up behind ..... I pull over .... wtf ??? a licence check maybe ...

nope .... a magic three pointer from the rear of the court .... somehow he got 83 on his radar ....

oh well .... there is no sense arguing ....

a police officer the size of a barn quietly tells me that his equipment is working perfectly ....

I said to him "if I argue ... I call you a liar" he just gave a smile for a response

he said he was surprised that I would be speeding so close to where I work ... my reply ... "I wasn't" .... but 83 is 83 and you don't argue in Mexico

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I don't approve of speeding and I wasn't speeding last night (I think!!) .... but what gets me is that there is no REAL course of appeal here ... it is all over when the lights and whistles go off at you or the notice comes in the mail ... if I sensed that I would be listened to (and believed) I would appeal ... sad state of affairs

[Cobra]

return thread to speed limiters .....

[Mondie]

  BLKXRT said:

I don't approve of speeding and I wasn't speeding last night (I think!!) .... but what gets me is that there is no REAL course of appeal here ... it is all over when the lights and whistles go off at you or the notice comes in the mail ... if I sensed that I would be listened to (and believed) I would appeal ... sad state of affairs

that's the crux of it mate. Your word against his, no other witnesses, you're f*cked.

There is no recourse.

[Turbo6man]

  Mondie said:

  trbo 6 said:

  BLKXRT said:

I've been at 240    limited to 230 I think .... the speedo is out by about 3-5% ....

Why is your speedo out???

Its my understanding that the speedo reads about 3% under your actual speed keeping things conservative.

So if youre doing 240kmh the speedo could be reading more like 232kmh. When the digital speed readout is enabled on the BA (Police mode) it apparently reads about 3 kmh faster at 100kmh than the analog speedo. Since the ECU works off the actual speed as displayed by police mode l believe that's where the speed disrepency with the speed limiter comes from.

I think you are confused Mondie - the speedos NEVER read lower than your true road speed when the car leaves the factory.

The only way this could happen is if you were to change to a higher profile tyre thus giving your wheels a larger rolling circumference which means less revolutions per kilometre and so the speedo gives a false low reading.

As for police mode, this is no more accurate than your speedo unless it is calibrated on a WDS. Once calibrated the analogue guage should also read the "true" figure. Police mode simply means you have a digital readout of your speed. Why it would vary from the analogue guage I do not know. Maybe FORDTECH has the technology of this one at hand ...

[Mondie]

l am only repeating what l have heard before T6man but it makes good sense to me.

See if Fordtech can confirm, although l havent seen him around much lately.

[Cobra]

I've seen 107kph on the speedo .... with the dyno reading 100kph

so the thinking is that you can re-calibrate in your brain & right foot for the difference ... but nop

will do 60/70/80 on the dyno and see what happens ... might start making those speedo stickers (like the mph to kph stickers that were glued direct to the plastic leaving just enough room to spot the needle looming behind - way before I was born ... folk law) ... make a fortune ... not :lol:

[Adam]

  Mondie said:

l am only repeating what l have heard before T6man but it makes good sense to me.

See if Fordtech can confirm, although l havent seen him around much lately.

He's on holidays visiting relos interstate.

I'll get my copper mate to radar my T at 100 and 110, I'll let you know how I go.

[Benny]

When your car leaves the factory the speedo is calibrated to read about 3-4% more than your actual speed. This can be recalibrated on the WDS to be exact if you want to have it that way. I've left mine just for some buffering.

[turbotom]

If you want to check your real speed, use a first principles approach.....

I just travelled to Melbourne in my vette, which has a speedo which reads very inaccurately in mph.

I was paranoid about being caught for speeding in Victoria though, so wanted to establish what indicated speed I could sit on to be at 100kph actual

I used the kilometre markers on the highway. Easy if you have a chronometer dial on your analog watch.... just sit on a constant indicated speedo setting (eg 60mph)

and start the chronometer at the first marker..... stop it after the next km marker.

The average speed for that kilometre is indicated on the chronometer dial....

Or if you haven't got a chron0meter, simply divide 3600 by the time in seconds.

100 kph should take exactly 36 seconds. 120 kph would be exactly 30 seconds etc.

The trick of course, is to sit on a constant speed, and the assumption is that the kilometre markers are accurate.

To satisfy my concerns (and to keep me from going crazy as I was on my own) I repeated the check over quite a few different markers, and got very consistent results. I established the correct indicated speed I could sit on for 50, 60, 80 100 and 110 kph.

My understanding as posted by several others, is that legally the manufacturer can NOT have a speedo which indicates more than the actual speed. The speedos are therefore deliberately set to overread by about 3~4%.(safeguard for differing tyre profiles and instrument tolerances)

This has the claimed advantage of keeping drivers below the speed limit if they drive according to the posted limits, and even improves fuel efficiency slightly as they would typically drive at about 5kph slower on the highways.

In actual practice, it has the effect of annoying the sh!t out of drivers who have an accurate method of establishing the speed reliably, and hold us up for miles on end when no overtaking opportunity presents itself.

When you get overtaken by every trucker with a 100 kph limited primemover, you should get the hint that you're NOT driving at the posted 100kph speed.

tom

and PS

my sympathies for you BLKXRT...

I too have fallen for suspect speed tickets in Mexico... especially in the Nhill to Stawell section of the highway.

[turbotom]

  fordboy1981 said:

does it have one??

getting back to the topic....

speed limiter in ute?

Yes. cuts in at indicated 235~240 kph -

At that speed, I could not check absolute accuracy as the kph markers were whizzing by too fast!