From: Noddy on

"Yvan" <me(a)privacy.net> wrote in message
news:5r0jvuF12dt38U1(a)mid.individual.net...

> So 50 mm high amos ring would not fit. Thank you for your kind offer to
> send it to me by post. I appreciate that.

Bad luck, but you're welcome.

In that case, I'd look at fabricating my own and go with John's excellent
advice.

Regards,
Noddy.



From: Yvan on
Nedavno Noddy pi�e:

>> So 50 mm high amos ring would not fit. Thank you for your kind offer
>> to send it to me by post. I appreciate that.
>
> Bad luck, but you're welcome.
>
> In that case, I'd look at fabricating my own and go with John's
> excellent advice.


I will. As soon as I find time.



--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **
From: John McKenzie on
Yvan wrote:
>
> Nedavno Noddy piše:
>
> > The mixer's dimensions are roughly 200mm in length, by 120mm in width
> > at the widest part of the "mouth", by 50mm in height. The air filter
> > bolt spacing of the Weber it was fitted to is identical to yours, so
> > one of these things should bolt straight on if your air filter housing
> > will allow enough clearance.
>
> Hight is critical. I just measured, and I have 44 mm from the air box
> base to the top cover. And that is if I remove top cover fixing nut
> carrier.
>
> So 50 mm high amos ring would not fit.

How much space is there before the top of the air cleaner touches the
bonnet - it it's only 6mm higher, you could probably fit it in - maybe
using a taller air filter element, and leaving the outer time unsealed.
That sounds terrible, but I'll take a couple of pictures to show what I
mean - it's actually very good in practice. or maybe if you made your
own bolts to secure the top lid of the air filter in different locations
to fit under the bonnet.

I won't be able to get the pictures for a day or two, I'll post back to
the thread when I do.


--
John McKenzie

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From: Yvan on
Nedavno John McKenzie pi�e:

>> So 50 mm high amos ring would not fit.
>
> How much space is there before the top of the air cleaner touches the
> bonnet - it it's only 6mm higher, you could probably fit it in - maybe
> using a taller air filter element, and leaving the outer time
> unsealed. That sounds terrible, but I'll take a couple of pictures to
> show what I mean - it's actually very good in practice. or maybe if
> you made your own bolts to secure the top lid of the air filter in
> different locations to fit under the bonnet.
>
> I won't be able to get the pictures for a day or two, I'll post back
> to the thread when I do.


I understand what you are talking about. But there are (six I think)
wire clips at the side of the air box cover, and a bolt in the center
of it.

And it is very close to the bonnet. With previous carb, I had mixer
plate between the carb and the air box, so air box was raised ~20 mm,
the insulation in the bonnet is dented, and there was even some contact
with bonnet at the one point.

With the new carb I do not have this mixer plate, but I do have adapter
plate at the bottom of the carburetor (so that I could fix it to the
intake manifold). Not much room left there.

If I find some time today, I'll try and make my own amos ring. First a
mack up (model) one out of a cardboard (perhaps I can start the engine
with it if it is rigid enough). And then some sheet metal work. Hope it
works.



--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **
From: Yvan on
Nedavno Yvan(a)office piše:

> If I find some time today, I'll try and make my own amos ring. First a
> mack up (model) one out of a cardboard (perhaps I can start the engine
> with it if it is rigid enough). And then some sheet metal work. Hope
> it works.


It does. I made my amos ring out of cardboard today:

http://www.ptt.yu/korisnici/i/v/ivica/lpg/amos1.jpg
http://www.ptt.yu/korisnici/i/v/ivica/lpg/amos2.jpg

For the gas entry point I used a pipe where engine breather hose is
connected to:

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

I started the engine and - it runs :-) I then decided to try driving
with it. I did not step on the gas pedal enough to open second barrel,
as the cardboard flexes under vacuum, and peaces are connected with a
tape, so I was afraid it might collapse.

I will check tomorrow morning if it will start on lpg when engine is
cold.

Next step is to make it out of metal, and to get it in a way that the
narrowest part is at the gas entry point (not easy with a easy flexing
cardboard).

I have a question about that. My previous carburetor had a 26 mm venturi
(the are of 530 mm2) and mixer plate ring inner diameter was 28 mm.
This new carburetor has 22 mm primary barrel venturi, and 24 mm at the
second barrel (combined area of 830 mm2). I was thinking of creating
35x30 mm area at the gas entry point. That gives 1050 - ~200 (gas entry
pipe) = ~850 mm2.

Is this correct? Should I do it in differrent size? How is it
calculated?



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