Classic V8 Fuel Consumption.

I'm bewildered to say the least by the difference in fuel consumtion between
my two Range Rover V8 Classics.

My auto 3.5 V8 does, on average, between 12 and 17 mpg, no matter what
treatment it gets. If it's used on the motorway extensively, cruising at
around 70ish it returns somewhere in the region of 17 mpg. Used in town it's
around 12. It normally does between 50 and 75 miles for £20.

My manual 3.5 V8 is stupidly good on fuel for a Range Rover; so good that
today I filled the tank to the brim this morning, and then brimmed it again
this evening. It did 89 miles for £15.12. Which by my reckoning is 26.5 mpg
near enough. (98.9 a litre). About 40 miles were on the motorway though, but
the urban stuff I was in a proper hurry - fuel consumption was the least of
my worries..

The Auto runs cleanly, the emissions are 0.75 co, 200 ppm HC, and something
like 10% Co2, it's got a K&N filter (which is about to come off) and a
standard exhaust pipe. It's a fair bit slower than the manual, but that's to
be expected.

The manual runs virtually identical emissions, pinks a touch more if on
cheap fuel, is very slightly tappety, has a standard air filter but has a
stainless exhaust (standard manifolds, not a sporty system).

They both appear to run the same injection set up, but the previous keeper
of the blue one said something about it having the airflow meter from a 3.9.

Surely it can't be as simple as putting a 3.9 AFM on to get this kind of
economy??? I thought the 3.9 used a different injection setup.


--
Pete M - The Corporate Penguin.
Range Rover Vogue EFI,
Porsche 911 Carrera 3.2 *For Sale*
OMF#9

"This is not 'Nam, this is bowling. There are rules"

On or around Sat, 13 May 2006 00:14:52 GMT, "Pete M"
<[email protected]> enlightened us thusly:

>They both appear to run the same injection set up, but the previous keeper
>of the blue one said something about it having the airflow meter from a 3.9.
>
>Surely it can't be as simple as putting a 3.9 AFM on to get this kind of
>economy??? I thought the 3.9 used a different injection setup.

the 3.9 is, I think, Hotwire, I don't know if you can fit that AFM to the
flapper system but I doubt it. Mind, I don't know if *every* 3.5 injection
RR is flapper, 'cos the 3.5 disco V8i is hotwire.

Badger's the chap who knows about these things, ISTR.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------\
>> http://www.schlockmercenary.com/ << \ ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

"Pete M" <[email protected]> wrote in
message news:[email protected]...
> I'm bewildered to say the least by the difference in fuel consumtion
> between my two Range Rover V8 Classics.
>
> My auto 3.5 V8 does, on average, between 12 and 17 mpg, no matter what
> treatment it gets. If it's used on the motorway extensively, cruising at
> around 70ish it returns somewhere in the region of 17 mpg. Used in town
> it's around 12. It normally does between 50 and 75 miles for £20.
>
> My manual 3.5 V8 is stupidly good on fuel for a Range Rover; so good that
> today I filled the tank to the brim this morning, and then brimmed it
> again this evening. It did 89 miles for £15.12. Which by my reckoning is
> 26.5 mpg near enough. (98.9 a litre). About 40 miles were on the motorway
> though, but the urban stuff I was in a proper hurry - fuel consumption was
> the least of my worries..
>
> The Auto runs cleanly, the emissions are 0.75 co, 200 ppm HC, and
> something like 10% Co2, it's got a K&N filter (which is about to come off)
> and a standard exhaust pipe. It's a fair bit slower than the manual, but
> that's to be expected.
>
> The manual runs virtually identical emissions, pinks a touch more if on
> cheap fuel, is very slightly tappety, has a standard air filter but has a
> stainless exhaust (standard manifolds, not a sporty system).
>
> They both appear to run the same injection set up, but the previous keeper
> of the blue one said something about it having the airflow meter from a
> 3.9.
>
> Surely it can't be as simple as putting a 3.9 AFM on to get this kind of
> economy??? I thought the 3.9 used a different injection setup.
>
>
> --
> Pete M - The Corporate Penguin.
> Range Rover Vogue EFI,
> Porsche 911 Carrera 3.2 *For Sale*
> OMF#9
>
> "This is not 'Nam, this is bowling. There are rules"
Thats about the figures I had in Peggy a 3.5 EFi auto. Where I suffered tho
was in heavy traffic which due to an unthinking shift change meant I was in
the schools traffic flow in the morning mpg solidly into single figures
typically around 8mpg at MOT Jim suggested it was running quite lean and I
could safely richen up the mixture a bit if performance was suffering . I
left as was tho - like my dad always said don't fix it if it isn't broken.
Derek
200TDi Disco

In news:[email protected],
Austin Shackles <[email protected]> waffled on in a semi-interesting
fashion, it went something like this;
> On or around Sat, 13 May 2006 00:14:52 GMT, "Pete M"
> <[email protected]> enlightened us
> thusly:
>
>> They both appear to run the same injection set up, but the previous
>> keeper of the blue one said something about it having the airflow
>> meter from a 3.9.
>>
>> Surely it can't be as simple as putting a 3.9 AFM on to get this
>> kind of economy??? I thought the 3.9 used a different injection
>> setup.
>
> the 3.9 is, I think, Hotwire, I don't know if you can fit that AFM to
> the flapper system but I doubt it. Mind, I don't know if *every* 3.5
> injection RR is flapper, 'cos the 3.5 disco V8i is hotwire.

According to the HBoL some 3.5s are Hotwire, but they're later than this
one...
>
> Badger's the chap who knows about these things, ISTR.

Ahh..

Whereas you're the man with the plan when it comes to LPG. Any idea where I
can get help with a half installed Stefanelli LPG system? The auto has a
tank, a vaporiser, the switchover switch, and a boot full of random bits,
injector emulators and stuff. I don't know if it was ever fully installed,
but it looks like it was at some point.

--
Pete M - The Corporate Penguin.
Range Rover Vogue EFI,
Porsche 911 Carrera 3.2 *For Sale*
OMF#9

"This is not 'Nam, this is bowling. There are rules"

On or around Sat, 13 May 2006 23:59:38 GMT, "Pete M"
<[email protected]> enlightened us thusly:

>In news:[email protected],
>Austin Shackles <[email protected]> waffled on in a semi-interesting
>fashion, it went something like this;
>> On or around Sat, 13 May 2006 00:14:52 GMT, "Pete M"
>> <[email protected]> enlightened us
>> thusly:
>>
>>> They both appear to run the same injection set up, but the previous
>>> keeper of the blue one said something about it having the airflow
>>> meter from a 3.9.
>>>
>>> Surely it can't be as simple as putting a 3.9 AFM on to get this
>>> kind of economy??? I thought the 3.9 used a different injection
>>> setup.
>>
>> the 3.9 is, I think, Hotwire, I don't know if you can fit that AFM to
>> the flapper system but I doubt it. Mind, I don't know if *every* 3.5
>> injection RR is flapper, 'cos the 3.5 disco V8i is hotwire.
>
>According to the HBoL some 3.5s are Hotwire, but they're later than this
>one...
>>
>> Badger's the chap who knows about these things, ISTR.
>
>Ahh..
>
>Whereas you're the man with the plan when it comes to LPG. Any idea where I
>can get help with a half installed Stefanelli LPG system? The auto has a
>tank, a vaporiser, the switchover switch, and a boot full of random bits,
>injector emulators and stuff. I don't know if it was ever fully installed,
>but it looks like it was at some point.

Badger's no slouch on that front either. His disco II is running an OMVL
Dream 1N injection system, ISTR.

Yours sounds like someone botched the install and gave up. whereabouts are
you?
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------\
>> http://www.schlockmercenary.com/ << \ ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

In news:[email protected],
Austin Shackles <[email protected]> waffled on in a semi-interesting
fashion, it went something like this;
> On or around Sat, 13 May 2006 23:59:38 GMT, "Pete M"
> <[email protected]> enlightened us
> thusly:
>
>> In news:[email protected],
>> Austin Shackles <[email protected]> waffled on in a
>> semi-interesting fashion, it went something like this;
>>> On or around Sat, 13 May 2006 00:14:52 GMT, "Pete M"
>>> <[email protected]> enlightened us
>>> thusly:
>>>
>>>> They both appear to run the same injection set up, but the previous
>>>> keeper of the blue one said something about it having the airflow
>>>> meter from a 3.9.
>>>>
>>>> Surely it can't be as simple as putting a 3.9 AFM on to get this
>>>> kind of economy??? I thought the 3.9 used a different injection
>>>> setup.
>>>
>>> the 3.9 is, I think, Hotwire, I don't know if you can fit that AFM
>>> to the flapper system but I doubt it. Mind, I don't know if
>>> *every* 3.5 injection RR is flapper, 'cos the 3.5 disco V8i is
>>> hotwire.
>>
>> According to the HBoL some 3.5s are Hotwire, but they're later than
>> this one...
>>>
>>> Badger's the chap who knows about these things, ISTR.
>>
>> Ahh..
>>
>> Whereas you're the man with the plan when it comes to LPG. Any idea
>> where I can get help with a half installed Stefanelli LPG system?
>> The auto has a tank, a vaporiser, the switchover switch, and a boot
>> full of random bits, injector emulators and stuff. I don't know if
>> it was ever fully installed, but it looks like it was at some point.
>
> Badger's no slouch on that front either. His disco II is running an
> OMVL Dream 1N injection system, ISTR.
>
> Yours sounds like someone botched the install and gave up.
> whereabouts are you?

Liverpool...


--
Pete M - The Corporate Penguin.
Range Rover Vogue EFI,
Porsche 911 Carrera 3.2 *For Sale*
OMF#9

"This is not 'Nam, this is bowling. There are rules"

On or around Sun, 14 May 2006 12:00:25 GMT, "Pete M"
<[email protected]> enlightened us thusly:

>> Yours sounds like someone botched the install and gave up.
>> whereabouts are you?
>
>Liverpool...

rather a long way from either of us.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"Brevis esse laboro, Obscurus fio" (it is when I struggle to be
brief that I become obscure) Horace (65 - 8 BC) Ars Poetica, 25

In news:[email protected],
Austin Shackles <[email protected]> waffled on in a semi-interesting
fashion, it went something like this;
> On or around Sun, 14 May 2006 12:00:25 GMT, "Pete M"
> <[email protected]> enlightened us
> thusly:
>
>>> Yours sounds like someone botched the install and gave up.
>>> whereabouts are you?
>>
>> Liverpool...
>
> rather a long way from either of us.

Indeed, but possibly worth it...


--
Pete M - The Corporate Penguin.
Range Rover Vogue EFI,
Porsche 911 Carrera 3.2 *For Sale*
OMF#9

"This is not 'Nam, this is bowling. There are rules"