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Author Topic: Consumption  (Read 15632 times)

Offline R32UK

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Re: Consumption
« Reply #50 on: 23 October 2009, 07:19 »
Quote from: VWKev on 22 October 2009, 23:09
Quote from: orca on 22 October 2009, 19:28
Have you checked your tyre pressure?

Come to think of it, no I aint done that yet.

Is there a particular pressure it should be at ?

is that a trick question?? seriously kev!! have you not opened the petrol refil cap yet?? (BIG CLUE THERE) :wink:
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Offline VWKev

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Re: Consumption
« Reply #51 on: 23 October 2009, 08:02 »
Quote from: R32UK on 23 October 2009, 07:19
Quote from: VWKev on 22 October 2009, 23:09
Quote from: orca on 22 October 2009, 19:28
Have you checked your tyre pressure?

Come to think of it, no I aint done that yet.

Is there a particular pressure it should be at ?

is that a trick question?? seriously kev!! have you not opened the petrol refil cap yet?? (BIG CLUE THERE) :wink:

Says 38 psi ? Will check later.
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Offline R32UK

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Re: Consumption
« Reply #52 on: 23 October 2009, 08:19 »
I would go for 40 at the front and 42 at the back :wink:
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Offline Gazdebaz

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Re: Consumption
« Reply #53 on: 23 October 2009, 08:56 »
I know this is basic stuff, but it does surprise me how many people are not aware of the effects of thermal expansion.

When checking your vehicle's tyre pressure, make sure the tyres are "cold". Cold air pressure means that the vehicle has not yet been driven half a mile (remember that driving on a tyre as well as being in direct sunlight increases its temperature and air pressure). If you must drive more than 1/2 mile for air, check and record the air pressure in all your tyres before you leave. Once at the garage, measure each tyre's inflation again and then note the difference. Inflate the tyres to a level that is equal to the recommended cold pressure plus the difference at the higher temperature.

I.e. Recommended tyre pressure is 38 psi. Cold pressure at home = 35psi at garage air pressure shows 37psi (if tyre has heated up). Inflate tyre by 3psi.

 :nerd:


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Offline Ess_Three

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Re: Consumption
« Reply #54 on: 23 October 2009, 09:02 »
Quote from: Gazdebaz on 23 October 2009, 08:56

I.e. Recommended tyre pressure is 38 psi. Cold pressure at home = 35psi at garage air pressure shows 37psi (if tyre has heated up). Inflate tyre by 3psi.

 :nerd:

Gaz...tut, tut...
Should you not be working in SI units?
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Offline Gazdebaz

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Re: Consumption
« Reply #55 on: 23 October 2009, 09:07 »
Quote from: Ess_Three on 23 October 2009, 09:02
Gaz...tut, tut...
Should you not be working in SI units?

Could have, KPA and Bar are reasonably familiar, should have maybe used mmH20 or Bar absolute that would really have confused.  :wink:
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Offline Ess_Three

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Re: Consumption
« Reply #56 on: 23 October 2009, 09:26 »
Quote from: Gazdebaz on 23 October 2009, 09:07

Could have, KPA and Bar are reasonably familiar, should have maybe used mmH20 or Bar absolute that would really have confused.  :wink:

Ahh...the old mmH2O...
A man who knows his manometers!
Once and Instrument Tech, always and Instrument Tech eh?

Bar a, the measurement of choice for Vag-Com/VCDS for MAP sensors...that confused many too!  :grin:
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Offline Gazdebaz

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Re: Consumption
« Reply #57 on: 23 October 2009, 09:42 »
Quote from: Ess_Three on 23 October 2009, 09:26

Ahh...the old mmH2O...
A man who knows his manometers!
Once and Instrument Tech, always and Instrument Tech eh?


Give me a megapascal anytime.  :smiley:
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