From: Yvan on
I am fitting two barrel carburetor (Weber 32 ADF) into my BMW (316 E30)
in the place of original one barrel (Pierburg 1B2).

Currently I have LPG maximum flow adjuster (on the hose between the carb
and the evaporator) with one adjusting screw.

Now I have different one, with two adjusting screws (one for each
barrel).

What is the procedure for adjusting maximum flow? I think that standard
procedure where I rev the engine at 3000 rpm will be at primary barrel,
second will not open at 3000 rpm when vehicle is stationary (no load).

So how do I tune it?


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___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
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From: Jason James on

"Yvan" <me(a)privacy.net> wrote in message
news:5qbhjoFv3hs9U1(a)mid.individual.net...
> I am fitting two barrel carburetor (Weber 32 ADF) into my BMW (316 E30)
> in the place of original one barrel (Pierburg 1B2).
>
> Currently I have LPG maximum flow adjuster (on the hose between the carb
> and the evaporator) with one adjusting screw.
>
> Now I have different one, with two adjusting screws (one for each
> barrel).
>
> What is the procedure for adjusting maximum flow? I think that standard
> procedure where I rev the engine at 3000 rpm will be at primary barrel,
> second will not open at 3000 rpm when vehicle is stationary (no load).
>
> So how do I tune it?
> /__/\____/--\__\ ** http://counter.li.org/ **

Opinion only

How I'd do it is to start off with both adjusters set to 1/4 number of max
turns *out* or both max-flow controls opened to a 1/4 of max-flow,..then
take it for a drive on a freeway or a very quiet back road, running the car
at full-throttle in 3rd gear. If its starving for gas, the engine will run
out of revs. Then continue to open each control a whole turn of each screw
at a time until you achieve no further improvement in performance. Then open
both one turn more and leave them. The evap should have one or two controls
which adjust idle quality. From memory one is idle mixture, the other
"vacuum sensitivity". I'm reasonabley sure these are only active at idle to
off-idle RPMs.

Jason


From: Yvan on
Nedavno Jason James piše:

> How I'd do it is to start off with both adjusters set to 1/4 number of
> max turns out or both max-flow controls opened to a 1/4 of
> max-flow,..then take it for a drive on a freeway or a very quiet back
> road, running the car at full-throttle in 3rd gear. If its starving
> for gas, the engine will run out of revs. Then continue to open each
> control a whole turn of each screw at a time until you achieve no
> further improvement in performance. Then open both one turn more and
> leave them. The evap should have one or two controls which adjust idle
> quality. From memory one is idle mixture, the other "vacuum
> sensitivity". I'm reasonabley sure these are only active at idle to
> off-idle RPMs.


Thank you. I will try that when weather gets better, roads are covered
with snow now :-)



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

> How I'd do it is to start off with both adjusters set to 1/4 number of
> max turns out or both max-flow controls opened to a 1/4 of
> max-flow,..then take it for a drive on a freeway or a very quiet back
> road, running the car at full-throttle in 3rd gear. If its starving
> for gas, the engine will run out of revs. Then continue to open each
> control a whole turn of each screw at a time until you achieve no
> further improvement in performance. Then open both one turn more and
> leave them. The evap should have one or two controls which adjust idle
> quality. From memory one is idle mixture, the other "vacuum
> sensitivity". I'm reasonabley sure these are only active at idle to
> off-idle RPMs.


I adjusted max-flow for primary barrel, and I think it's OK now.

But I can not tune second barrel. I can feel when it starts to open.
When on petrol, and I press my foot down car just accelerates. On LPG I
can feel (and hear) that second barrel is open, but no acceleration
until revs go above 3500.

I tried to turning screw in and out (one turn at the time) but I always
get the same result.

Perhaps I should mention that LPG is introduced to each barrel with a
spud pipe (there was no room for a mixer plate directly above the
carburetor).



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

"Yvan" <me(a)privacy.net> wrote in message
news:5qh0oqFuv2heU1(a)mid.individual.net...
> Nedavno Jason James pise:
>
> > How I'd do it is to start off with both adjusters set to 1/4 number of
> > max turns out or both max-flow controls opened to a 1/4 of
> > max-flow,..then take it for a drive on a freeway or a very quiet back
> > road, running the car at full-throttle in 3rd gear. If its starving
> > for gas, the engine will run out of revs. Then continue to open each
> > control a whole turn of each screw at a time until you achieve no
> > further improvement in performance. Then open both one turn more and
> > leave them. The evap should have one or two controls which adjust idle
> > quality. From memory one is idle mixture, the other "vacuum
> > sensitivity". I'm reasonabley sure these are only active at idle to
> > off-idle RPMs.
>
>
> I adjusted max-flow for primary barrel, and I think it's OK now.
>
> But I can not tune second barrel. I can feel when it starts to open.
> When on petrol, and I press my foot down car just accelerates. On LPG I
> can feel (and hear) that second barrel is open, but no acceleration
> until revs go above 3500.
>
> I tried to turning screw in and out (one turn at the time) but I always
> get the same result.
>
> Perhaps I should mention that LPG is introduced to each barrel with a
> spud pipe (there was no room for a mixer plate directly above the
> carburetor).

This is getting into an area I'm not familiar with. I've asked Athol (in
this group) if he can throw some light.on your problem.

Jason.