Tire Pressure Monitor Valve (TPMS) - New Style

[mikey k]

peterr96 said:

mikey k said:

I work in the compressed air industry

Me too. Misses R is occasionally not impressed though

took a moment but I got there!

[George H]

mikey k said:

George H said:

BingoBob said:

IIRC air pressure increases linearly with temperature.

Indeed it does

No it doesn't
Boyles gas law

http://en.wikipedia.org/wiki/Boyle%27s_law

I'm pretty sure that's volume and pressure Mr K

Surely you are thinking of Charles' law

[mikey k]

Nope Boyles if you are assuming volume remains constant, even if it does it is only linear over a small pressure range

[George H]

mikey k said:

Nope Boyles if you are assuming volume remains constant, even if it does it is only linear over a small pressure range

Oh I'm thinking of volume and temperature then

[mikey k]

Ideal Gas Law (Boyles & Charles combined) covers temperature changes as pressure varies but is still not 100% correct as air in a tyre is not an ideal gas

(are we far enough off topic yet?
BTW I like the new dispay and the new system has NEVER thrown an error message on me (yet )

[BingoBob]

mikey k said:

Also I work in the compressed air industry as sensor with 3 decimal point accuracy over that range is WAY to large and expensive to put in a tyre. They only need 1 decimal point accuracy as temperature changes make anything else pointless.

That would be 1/1000, not 1/100

I don't know what to tell you. My guy put 2.5 bar in my tyres, I got the diagnostics on the car and it gave me values of 2.48 to 2.51bar depending on the wheel.

Accurate enough for me.

[peterr96]

mikey k said:

took a moment but I got there!

Ah well done Mikey.
Love the smilies you keep conjuring up. That one especially.

[mikey k]

I'd like to get hold of a gauge (and have my TPMS display) that displays to one decimal place let along 2 or 3
But that is just my OCD creeping in

[BingoBob]

Sorry, mikey, are you implying that I am making it up? Just to be clear.

[mikey k]

BingoBob said:

Sorry, mikey, are you implying that I am making it up? Just to be clear.

No I would like a gauge that does that.
I know there are sensors out there that will do what you say

[BingoBob]

Like this?

[BingoBob]

And here is a screenshot of the display of my tyre pressures that I just grabbed from my car:



So 1/100th bar (or 2 decimal places if you prefer) isn't beyond the realms of the imaginable in a car.

Now please stop going out of your way to contradict me at every opportunity. It's getting embarassing.

[Swiss_Toni]

Just to get back on topic, if only for a moment, are the senor the same as Porsche 997 items and are the part of the valve assembly or a separate senor fasten elsewhere?

If they are the 997 items does anyone have a part number?

[BingoBob]

£75 seems very cheap for a new TPMS sensor.

It looks like the manufacturer is Bendix. The AM part appears to be 1R12-360671-AC for the Vantage, but I have seen part number 1R12-36-10547 for the TPMS, too. Could be DB9? I can't find anything on the bendix cross reference tool.

Not much help, I'm afraid. I still think it's worth dropping a line to alloywheelsdirect. They were quite helpful when I asked them something.

Here is one for sale on ebay:

http://www.ebay.co.uk/itm/1-x-BRAND-NEW-Aston-Mart...

[BingoBob]

I've just re-read your post and seen that it's the valve that you want, not the TPMS. Sorry about that.

Perhaps give Bendix a call to find out if they have a distributor that you can get the valves from?

[Lunablack]

I've bought valves from this pace in the past, and the fitted the Vantage sensors.... They're on my car now...

They do 2 part numbers.... One is a black valve and the other silver/grey

5621460. Schwartz
5621461 Titangrau

I paid around €25 for 4 valves delivered to the UK

http://www.gall-stuttgart.de/uebersicht.php?artike...

[redkite]

BingoBob said:

£75 seems very cheap for a new TPMS sensor.

It looks like the manufacturer is Bendix. The AM part appears to be 1R12-360671-AC for the Vantage, but I have seen part number 1R12-36-10547 for the TPMS, too. Could be DB9? I can't find anything on the bendix cross reference tool.

Not much help, I'm afraid. I still think it's worth dropping a line to alloywheelsdirect. They were quite helpful when I asked them something.

Here is one for sale on ebay:

http://www.ebay.co.uk/itm/1-x-BRAND-NEW-Aston-Mart...

That one on ebay has the coloured rings so think its the old system.

I would definately contact alloywheelsdirect but suspect they wont be able to beat the dealer price due to low volume purchasing. If you do get one then take photos of it so we can see the part numbers etc..

[MichaelV8V]

BingoBob said:

Like this?

Hey, that looks like an A8, and you have VCDS. I love hacking my A8, and was pricing the components to add TPMS to mine just last night. It looks like a fairly straightforward job (much simpler than retrofitting the OEM reversing camera!) You pleased with the system?

A set of 5 wheel sensors and valves for the A8 is £149 inc. shipping from the US, which is substantially cheaper than anything I could find in Europe.

[BingoBob]

That's an amazing price. Does it include the customs and VAT when imported?

Are you retrofitting? I'm not sure how straightforward it is. You might need the controller and the antennas installing in the wheel arches if they are not already fitted. You'll need a vagcom to retrofit if you want the DIS integration.

[mikey k]

BingoBob said:

Like this?

Exactly
I see you are adept at VAGCOM as well