Not real sure about the emissions thing. When I put the Weber on the Midget,
I tuned it by ear. My timing light had failed. I set the idle, timing,
mixture by what sounded the best. The next morning I called the local
PepBoys and asked if they would check the emissions, just cuz I needed to
know if I could pass or if it was too far out of range. If it failed I would
need to go to classic plates (no emissions check on classics in PA, safety -
yes). They said they could do that for me as I explained that the car had
been parked for 6 years and I had just got it running. So I drove over and
they out it on the sniffer and got the readings, I don't recall what they
were now. It passed. So I had them stick the sticker on it and I was good to
go!!! So anyway I don't think the Weber will cause it to fail emissions just
cuz it is a Weber. If you have a emissions test that includes "Let me see if
all the stuff is there" kind of test, it won't pass. But mine did. Oh yea -
No airpump, no cat converter either.
Larry
78 Midget (Weber, Headers)
----- Original Message -----
From: Tab Julius <tab@penworks.com>
To: David Hill <Davhill@btinternet.com>
Cc: <mgs@autox.team.net>
Sent: Saturday, August 05, 2000 11:53 PM
Subject: Re: What are the true benefits of a Weber carb?
>
> David,
>
> Thanks - that's very helpful. Seems to be performance and response are
the
> factors. I understand that with the carb I also have to change the
> exhaust. What has to get changed to help choke diamter? Knowing this
> group, I'm guessing somewhere there's a recommended "List of Things To
> Change When Converting from a Zenith to a Weber". Know where that list
> might be?
>
> However, going to a Weber will wait until I put OD in. That's a definite
> priority.
>
> I know Weber makes it harder to pass emissions. We don't have emissions
> testing in my area, but I'm not looking to make some belching air-abusive
> car either. I'm not an enviro-nut, but I try not to be overly
> disrespectful either. What emissions part is the Weber particularly bad
in?
>
> Thanks for the informative answers...
>
> - Tab
>
> At 11:08 PM 8/5/00 +0100, David Hill wrote:
> >Hi, Tab.
> >
> >Carbs all do the same job, though not necessarily in the exactly the same
> >way. Sometimes, the stock carb is restrictive so a larger choke diameter
> >will allow the engine to breather better at higher revs. However, there
is a
> >great danger of overdoing this, so the gas speed is reduced to the extent
> >that the fuel doesn't atomise properly.
> >
> >Engine tuning is essentially about getting a bigger bang to happen
faster,
> >which is why much of the work involves allowing mixture to get in, though
> >and out of the motor as quickly as possible. This is why cam profiles and
> >exhaust/inlet flow get so much attention.
> >
> >The other element of tuning is accuracy-i.e. balancing combustion
chambers,
> >tweaking advance curves, etc. so as to make the events in the engine
happen
> >in under tighter control. In this respect, a Weber is, arguably, a better
> >unit than a Zenith, in that its provision of the right mixture for
different
> >conditions is more accurate.
> >
> >Remember, though, a Weber on its own won't make a huge difference and the
> >additional mods depend on numerous factors, including choke diameter.
> >
> >Hope this helps,
> >
> >Dave H.
> >
> >
> >----- Original Message -----
> >From: Tab Julius <tab@penworks.com>
> >To: <mgs@autox.team.net>
> >Sent: Saturday, August 05, 2000 8:23 AM
> >Subject: What are the true benefits of a Weber carb?
> >
> >
> > >
> > > Today, a gorgeous day, I met two (count 'em: 2!) MGs driving in my
town, a
> > > small town of 3000 people where I probably have the only one, unless
> > > someone else is keeping theirs tucked away.
> > >
> > > One was a B, the other a Midget. I talked to guy with the Midget, who
was
> > > just passing through, and he told me how he had reconditioned his,
> > > including replacing the Zenith with a Weber. He said it was a
definitely
> > > noticeable major difference, although he didn't elaborate (and by then
we
> > > were out of time). I have a '78 B, and now I'm wondering, if I moved
to a
> > > Weber:
> > >
> > > 1) What significant differences would I see?
> > > 2) What would be involved? Is it just changing the carb, or do I have
to
> > > do the muffler too, or what?
> > > 3) For those of you who moved from a Zenith to a Weber, what did you
> > > think? How much did it cost, and would you do it again?
> > >
> > > TIA,
> > >
> > > - Tab
> > >
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