Digital speed display

[Billman]

Thats it!

[vprelovac]

Billman that information is solid gold!

[zlobo]

Woo hoo climate control rules! This is most intriguing info, I am going to try it tomorrow.

Anyone has a list of displayable channels?

I was using average speed method today to confim that there is indeed around 9% difference in digital data (from ECU) and analog on speedo. 100 km/h indicated by speedo turned out to be only 91 km/h. 220 km/h was indeed only 200 km/h. That also brings one question if audi quted max speed of 247 km/h is that real or a "fake" one?

Is there some way to tune the analog display to show real data?

you can aldo calulate the real speed with data from tyers gearbox and engine rpm
klic here its in swidis but i thin you can figure it out or els ask me i translate,

[vprelovac]

Thanks Zlobo, nice link.

Question remain, is there a way to tune the analog speedo display to show real info?

[Ski]

well you can have you speedo re-calibrated so should be possible.

I think most people use any GPS system to show them their true speed, or, carry a calculator with you and take away 9% of your shown speed for your true speed

[Keeper of The Kitten]

Lol leave tape marks at real 30, 40, 50, 60, 70, 100.....

__MDC__

[hiltoa]

This thread is why this is one of THE best audi forums!

(former S2 infatuation junkie - now with A4 quattro sport, and still lovin the S2forum!)

[dirk]

"Press and hold the recirculation button. Then press the manual flow control up arrow. You should see a 1c. Press the temperature up ("+") or down ("-") buttons to select a code number."
When I hold the recirculation button and press manual flow control up arrow, nothing changes, the selected temperature stays on display. So no "1c" and codes displayed.
Some faulty connection or is my 1991 3B not equipped with this feature?

[vprelovac]

Well it isn't working for me either but I suspect faulty recirc button. Also manul flow control up arrow is "warmer" button right?

[dirk]

I thought "manual flow control up arrow" is the button most right and down, to speed up the fan?

[Markarina]

Apparently the reason why speedo's always read higher than true speed is that manufacturers have a legal requirement for the tolerance they are required to achieve, which I believe is 0% under to 10% over, if they fail to meet these tolerances then they get fined quite heavily.

So in theory you can never be going faster than the speed indicated on the speedo, interestingly enough we have been logging data from the OBD port and it seems to correlate with the speed shown on cluster, we haven't proved this yet but may well do over the next few days

[VladaS2]

Can anyone confirm that this feature is working? I tried on my 3b today and nothing happens. I press recirc and HI flow button and the display remains the same. But it is a very nice feature if it is working!!

[gn3dr]

It definitely works on the '96 S6. I used it last 2 years ago to diagnose that I had a stuck open thermostat and that it wasn't the gauge sender that was faulty.

[Efini]

Works on my '94 RS2.

[VladaS2]

OK other 3B guys, will you run into your garage and check this, how hard can it be?