Vacuum gauge

[Ext User(cocking my lovegun)]

G'day all
I have been given a vaccum gauge today and remember hearing some time
ago something about the benefits of having a vacuum gauge permanantly
attached to the manifold . Can someone tell me about the benefits
exactly or even point me to a web site that can? (mixture settings and
good for detecting sticky valves i seen to recall)
I run 308 with a 600 Holley and if this can save me a few dollars
somehow on preventative maintenance or fuel economy then i'll whack her
on
Thanks

[Ext User(John_H)]

cocking my lovegun wrote:
>
>I have been given a vaccum gauge today and remember hearing some time
>ago something about the benefits of having a vacuum gauge permanantly
>attached to the manifold . Can someone tell me about the benefits
>exactly or even point me to a web site that can? (mixture settings and
>good for detecting sticky valves i seen to recall)

Unless you're competing in an economy run it's not worth the space on
the dash. There's been a few cars which have had 'em standard (around
the time of the last oil shock) and all were a PIA -- they were called
economy gauges of course.

Very useful as a diagnostic tool however, and even more so when
they're also visible while you're working under the bonnet. It also
requires a decent quality gauge that's calibrated to be any use for
diagnostics (mine's around 100mm diameter and calibrated in cm of Hg).
'Economy gauges' don't usually qualify for this application.

>I run 308 with a 600 Holley and if this can save me a few dollars
>somehow on preventative maintenance or fuel economy then i'll whack her
>on

If you've never seen one before the novelty will wear off in about
half a day. After that, watching the needle bottom out every time you
touch the throttle, even if it's only momentarily, ought be enough to
give you the shits.

You could always hook it up temporarily if you need convincing.

--
John H

[Ext User(John_H)]

a9x5l wrote:
>
>On Thu, 22 Jun 2006 07:28:28 -0700, cocking my lovegun wrote:
>>
>> I run 308 with a 600 Holley and if this can save me a few dollars
>> somehow on preventative maintenance or fuel economy then i'll whack her

>
>http://www.users.bigpond.com/ergoff/vac1.htm

17-21 ins Hg at idle is a normal motor!!!

I don't think so. Unless it happens to be a highly detuned example.

More like 12-15 for a 308 with any sort of cam.

--
John H

[Ext User(cocking my lovegun)]

I have a standard 308 that i've just finish rebuilding and still to be
run in. I'll connect the vacuum gauge up today and see what's what. 12
- 15 you say for a 308?.. cool, i'll let you know what reading i get.
Though it might change after the running in, it'll be interesting to
see what it reads now. You adjust the mixture until you acheive the
highest vacuum.. does that sound right to you?

[Ext User(Trevor Wilson)]

"cocking my lovegun" <geoffharrison@iinet.net.au> wrote in message
news:1150986507.954444.103480@m73g2000cwd.googlegr oups.com...
> G'day all
> I have been given a vaccum gauge today and remember hearing some time
> ago something about the benefits of having a vacuum gauge permanantly
> attached to the manifold . Can someone tell me about the benefits
> exactly or even point me to a web site that can? (mixture settings and
> good for detecting sticky valves i seen to recall)
> I run 308 with a 600 Holley and if this can save me a few dollars
> somehow on preventative maintenance or fuel economy then i'll whack her
> on

**I have a much better way of saving you money. A mechanic applied it to a
mate's HQ 253 V8. He saved around 15% instantly. It cost bugger all too.

He fitted a big(er) spring to the accelerator pedal. Much better than any
vacuum gauge.


--
Trevor Wilson
www.rageaudio.com.au





--
Posted via a free Usenet account from http://www.teranews.com

[Ext User(JD)]

Trevor Wilson wrote:

>
> "cocking my lovegun" <geoffharrison@iinet.net.au> wrote in message
> news:1150986507.954444.103480@m73g2000cwd.googlegr oups.com...
>> G'day all
>> I have been given a vaccum gauge today and remember hearing some time
>> ago something about the benefits of having a vacuum gauge permanantly
>> attached to the manifold . Can someone tell me about the benefits
>> exactly or even point me to a web site that can? (mixture settings and
>> good for detecting sticky valves i seen to recall)
>> I run 308 with a 600 Holley and if this can save me a few dollars
>> somehow on preventative maintenance or fuel economy then i'll whack her
>> on
>
> **I have a much better way of saving you money. A mechanic applied it to a
> mate's HQ 253 V8. He saved around 15% instantly. It cost bugger all too.
>
> He fitted a big(er) spring to the accelerator pedal. Much better than any
> vacuum gauge.
>
>
Actually even better is a stronger spring that comes in about half throttle.
JD

[Ext User(Andy)]

a9x5l wrote:
> On Fri, 23 Jun 2006 09:07:59 +1000, John_H wrote:
>
>
>>a9x5l wrote:
>>
>>>On Thu, 22 Jun 2006 07:28:28 -0700, cocking my lovegun wrote:
>>>
>>>>I run 308 with a 600 Holley and if this can save me a few dollars
>>>>somehow on preventative maintenance or fuel economy then i'll whack her
>>
>>>http://www.users.bigpond.com/ergoff/vac1.htm
>>
>>17-21 ins Hg at idle is a normal motor!!!
>>
>>I don't think so. Unless it happens to be a highly detuned example.
>
>
> My VN, which is either stock or has a very small cam, idles at 18.


My stocker Hemi 6 idles around 20.

Cheers,

Andy. (The other Andy.)