From: John McKenzie on
Yvan(a)office wrote:
>
> Nedavno Noddy napisa:
>
> > As I mentioned earlier, it doesn't get as cold here in sunny old
> > Melbourne
>
> What are the usual low winter temperatures in Melbourne (not the short
> extremes that last for a couple of days)?

I've lived in or around Melbourne for most of my life - it's snowed 3
times in 35 years that I can remember.

Only a few 0s overnight in middle of winter.

In summer - we get usually 4-5 days with a peak of 44-45C, and generally
around 30C for most of summer.

And this is one of the colder areas of the country (except the Island of
Tasmania to our south)


--
John McKenzie

tosspam(a)aol.com abuse(a)yahoo.com abuse(a)hotmail.com abuse(a)earthlink.com
abuse(a)aol.com vice.president(a)whitehouse.gov president(a)whitehouse.gov
sweep.day(a)accc.gov.au uce(a)ftc.gov admin(a)loopback abuse(a)iprimus.com.au
$LOGIN(a)localhost world's #1 sardine whisperer root(a)mailloop.com
$USER@$HOST $LOGNAME(a)localhost -h1024(a)localhost abuse(a)msn.com
abuse(a)federalpolice.gov.au fraudinfo(a)psinet.com abuse(a)asio.gov.au
$USER(a)localhost abuse(a)sprint.com abuse(a)fbi.gov abuse(a)cia.gov
From: feral on
Athol wrote:

> Religion is a substitute for common sense, morals, decency and all the
> other things that people should inherently have but many don't...
>
I like that, can I use it pls?

Seeing as how it doesn't fit you. :-P

--
Take Care. ~~
Feral Al ( @..@)
(\- :-P -/)
((.>__oo__<.))
^^^ % ^^^
From: Yvan on
Nedavno John McKenzie napisa:

> > >> I just did some testing (nice sunny weather today :-). I drilled
> > >> small hole near the top of the carburetor with a thread in it,
> > >> and used a bolt to fix choke plate in opened position. I can now
> > >> start and run on lpg from cold with spud pipes setup. I will
> > >> have to test this again tomorrow morning, it was warm outside
> > >> today.
> > >
> > > Well done.
> >
> > Not actually :-( It was relatively warm yesterday, and the engine
> > did not cool completely. This morning choke block did not make any
> > difference. I could not start the engine, and it would not idle
> > until it warmed up almost to the normal operating temperature. But
> > not to worry, amos ring is at final stages of design, I just need
> > to fabricate it :-)


Reading all this again I decided to test what I learned on my old
Pierburg. As I understand you do not need any sort of cold start device
on lpg cold start. So I blocked choke flap open, and blocked piston
(part number 73 on the photo) closed. I blocked it closed because it
should close when coolant temperature reaches 70 degrees Celsius. That
should disable cold start.

http://www.ptt.yu/korisnici/i/v/ivica/lpg/1B2.jpg


For this carburetor I have what I believe is the right lpg mixer plate.
It sits in filter box on top of the carburetor, as you suggested I
should fabricate for my new carb:

http://www.ptt.yu/korisnici/i/v/ivica/lpg/mixerplate.jpg


Result is that I can now start on lpg, but it needs some 5 min ow warm
up before it will run at idle. Much better than before, but not there
yet.

Idle adjustment screw is plugged with tamper-proof plug, I unplugged it
and adjusted idle (at engine running at normal operating temp). It was
low.

How to adjust it further, so it will run at idle after a cold start?

I have this idle adjustment screw, idle air adjustment screw, and
mixture adjustment screw (that I think is for petrol only, nothing to
do with lpg). Idle air adjustment screw and mixture adjustment screw
are also shown on the photo. And, I almost forgot idle mixture screw on
the vaporizer (converter).


--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **


--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **
From: Noddy on

"Yvan(a)office" <me(a)privacy.net> wrote in message
news:20071205083922.08b18b78(a)informatika.21oktobar.com...

> Idle adjustment screw is plugged with tamper-proof plug, I unplugged it
> and adjusted idle (at engine running at normal operating temp). It was
> low.

Are you sure it was the idle speed adjusting screw, or the idle *mixture*
adjusting screw?

On the image you provided I can see what looks to be an idle mixture
adjusting screw (which looks like it would have been capped with a tamper
proof plug in the picture), but I can't see an idle speed adjusting screw as
the throttle linkage portion of the carb is not shown.

> How to adjust it further, so it will run at idle after a cold start?
>
> I have this idle adjustment screw, idle air adjustment screw, and
> mixture adjustment screw (that I think is for petrol only, nothing to
> do with lpg). Idle air adjustment screw and mixture adjustment screw
> are also shown on the photo. And, I almost forgot idle mixture screw on
> the vaporizer (converter).

So, the idle is adjusted by an air bleed screw and not on the throttle
lever?

Have a look at the side of the carb where the throttle cable or linkage
attaches to the carburettor, and see if there is an adjustment screw
somewhere on either the carburettor body or the throttle cable/linkage lever
itself that will allow you to adjust the idle by changing the position of
the throttle plate.

If there isn't, then my advice would be to get the idle running
satisfactorily on petrol and then adjusting the idle quality with the idle
mixture screw on the converter (which you'll no doubt have to do anyway).

--
Regards,
Noddy.


From: Yvan on
Nedavno Noddy piše:

>> Idle adjustment screw is plugged with tamper-proof plug, I unplugged
>> it and adjusted idle (at engine running at normal operating temp). It
>> was low.
>
> Are you sure it was the idle speed adjusting screw, or the idle
> *mixture* adjusting screw?

Yes I am. Here is another drawing:

http://www.ptt.yu/korisnici/i/v/ivica/lpg/1B2-2.jpg


> So, the idle is adjusted by an air bleed screw and not on the throttle
> lever?


Pierburg 1B2 has fully automatic choke. It does not have stepped cam,
instead it has coolant heated device (waxstat) (number 75 on the
drawing at the link above), and electrically heated one (82). Choke
flap is electrically operated.

As temperature rises wax expands, and pushes piston (73) that closes
path to the air-fuel mixture that bypasses throttle butterfly. It seems
that this waxstat and part no 82 are not functioning as they should
(dealership refused to fix it as I did lpg conversion, and my complain
to BMW had no effect). And it's to expensive to just purchase this two
parts just to try if it will fix my cold start problem).

So I figured if lpg does not need any cold start device, I could block
this opening (so no air bypasses butterfly) - and that way I get simple
carburetor without cold start device. I also blocked open choke flap.

Idle adjustment screw exist (8) but it was blocked with a tamperproof
plug. Carburetor manual states that it's adjusted in factory, and
should be left as is (and for some 20 years it was OK). So you should
only adjust air bleed and mixture.

But I figured, since I blocked air bypass I should slightly increase
butterfly angle to let more air in, and raise idle rpm.

As you can see this 1B2 is very complex carburetor compared to Weber 32
ADF that I am fitting now.

But since I already had mixer for 1B2 I wanted to test if it will run
without cold start device.

And yes, it runs well on petrol (when the engine is warmed up).



--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **