From: Yvan on
Nedavno John McKenzie piše:

>> BTW I also have another problem. Engine will not run on lpg until it
>> heats up around 1/4 of the normal operating temperature, and will
>> stall if I lift my foot of throttle. When it heats up it runs OK at
>> idle.
>
> Ok the 'theory' on this is that you are supposed to set the idle a/f
> mixture when the motor is cold for best cold idle smoothness. What is
> supposed to happen is that as the car heats up, the higher coolant
> temperature flowing through the convetor will automatically lean the
> mixture out a little bit to suit.
>
> That's basically where I'd be looking to fix it - by starting it, and
> adjusting the idle a/f till it will run when completely cold. It might
> need another person there to help start and help keep it running
> whilst you adjust the mixture.

But if I turn idle setup mixture screw more than half a turn in or out
while engine is hot revs will drop, and I think that it may need more
than half a turn to get cold smooth idle.

Than again, I now disconnected lpg hose to the second barrel, and I
think I have better setup now, so I am going to try this tomorrow.


>> Before I changed carburetor I could start my engine on lpg. Just to
>> mention it runs OK on petrol.
>
> Based on everything so far - it's the twin spud setup not being
> compatible with a two barrel that has different primary and secondary
> opening rates. I definitely think the amos ring/ carb hat device is
> the best option - it will not be bothered at all by the secondary
> opening rate - since it sits above the top of the carb. It's also 100%
> compatible with the current convertor - so there'd be little work to
> do to actually fit it.

I have never seen this carb hat before. Can you post a link to a page
with more details of it's design?

What do you think about this:

http://www.ptt.yu/korisnici/i/v/ivica/lpg/MixerPlateIdea1.jpg



> If the one Noddy has doesn't fit based on your post with the
> measurement/spacing of the bolts on top - I'll find one that does -
> it's not a big deal - there's absolutely tons of lpg stuff down here -
> it's been popular since around the late 1970s


Thank you.


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From: Yvan on
Nedavno John McKenzie piše:

> here is the area that can be connected to the air filter case.
>
> http://jmacperformance.com/Vap1.JPG


OK, thank you.


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From: Yvan on
Nedavno John McKenzie piše:

> I know this will be a bit of a pain, but could you edit a picture
> looking down from the top of the carb, and add measurements of the
> bolt spacing, the size of each carb barrel, and the height of each
> edge compared to the air cleaner base (if that makes sense?) - just to
> be sure.


Here:

http://www.ptt.yu/korisnici/i/v/ivica/lpg/32ADF-dimensions-1.jpg
http://www.ptt.yu/korisnici/i/v/ivica/lpg/32ADF-dimensions-2.jpg

I wrote dimesions in second photo as I remember it I will measure it
tomorrow and post it. Also you probably need the size of a top of a
barrel, not a venturi (choke, smallest diameter). I'll post that too
tommorrow.

And there is also a steel piece for bolting air box top cover that
should be taken in consideration photos 5-7 from the top here:

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


> There's usually one to fit anything. It'll just be a matter
> of finding the right one. There's some local wreckers here where you
> can go in and take the parts off yourself and pay as you leave. In
> those cases, you don't have to wait at the front of the yard while
> they get the part - we can go in and measure or whatever we need, and
> keep looking till the right one is found. I usually go to my local one
> every week or two just to see what might have been brought into the
> yard, so it's not a big deal to take a look.


I have a friend with a mill and a lathe, so I can fabricate mixer if not
too complicated.

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From: Yvan on
Nedavno Yvan piše:

> What do you think about this:
>
> http://www.ptt.yu/korisnici/i/v/ivica/lpg/MixerPlateIdea1.jpg

It's a mixer plate with one ring over both barrels. It might not be
clear what I vanted to say looking at my artistic visualisation :-)


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From: Noddy on

"Yvan" <me(a)privacy.net> wrote in message
news:5qtcbnF11sp5qU3(a)mid.individual.net...

> Of course I would pay, that is not a problem, But the question is will
> it fit without too much trouble. Look here at photos 5-7 from the top:
>
> http://www.ptt.yu/korisnici/i/v/ivica/lpg/lpg.html
>
> There is a steel piece for bolting air box top cover. And there is not
> much room above the top of the carb. If I have to do a lot of fitting,
> it may be perhaps easier to fabricate mixer plate. Here is bolt pattern
> at the top of the carburetor (again I hope ASCI art is OK):
>
>
> | 2
> 1 |
> |
> |
> ------------------
> |
> |
> 3 |
> | 4
>
>
>
> Vertical distance between bolts 1 and 3 is 83 mm (3 1/4 inch) and
> between bolts 2 and 4 is 92 mm (3.6").
> Horizontal distance between bolts 1 and 2, and bolts 3 and 4 is the same
> 65 mm (~ 2 1/2 inch).

I'll take some measurements of my Amos mixer today and get them back to you,
but I would think the top bolt spacing would be the same or very close for
both Webers.

If you wanted to fabricate your own mixer it wouldn't be very difficult as
they're very basic devices. I'll get some more photo's online for you today
that will hopefully give you a better idea of what you would need to

--
Regards,
Noddy.