<VV> Possible Answer? Re: idle question 2

[MarK Durham]

Frank, if you wanted to know, you would learn very quickly the shortcomings
of the carburation system. It might help you determine which generation
carb you want on  your engine because the later generation carbs fill in
some of those bad spots with enrichment circuits, bleeds, etc. It would
also help you determine which jets are approriate and you would end up with
the best of the best for a carburation system.

That's all well and good, but there is a reason why auto manufaturers went
to the more advanced computerized systems. More advanced control of the
engines means smoother running cleaner running engines.

I still plan to install a EFIsystem to also help with reliability of
components, but thats a year or two down the road.


 Mark Durham
Hauser, Idaho
62 Monza coupe Red/Red 4 speed


On Mon, Jul 14, 2014 at 12:50 PM, frankcb--- via VirtualVairs <
virtualvairs at corvair.org> wrote:

>
>
>     Would it make sense to install a WIDE-band Oxygen sensor (with
> dashboard readout) in the exhaust line?  I believe modern cars use these to
> provide feedback to the computer to adjust the air/fuel ratio entering the
> combustion chambers of the engine.  But we could use it to let us know
> UNDER WHAT CONDITIONS the mixture entering the cylinders has become too
> lean (or too rich) for correct firing.
>     Amazon offers these in the $150 to $200 range.
>     Frank Burkhard
>     Boonton, NJ
>
>
>
> -----Original Message-----
> From: Jay Maechtlen via VirtualVairs <virtualvairs at corvair.org>
> To: Matt Nall <patiomatt at aol.com>; virtualvairs <virtualvairs at corvair.org>
> Sent: Thu, Jul 10, 2014 12:16 pm
> Subject: Re: <VV> idle question 2
>
>
> On 7/9/2014 7:57 PM, Matt Nall via VirtualVairs wrote:
> >       Well, tonight I had to move the car across the driveway.  The
> engine was
> > stone cold not having been run in a week.  Imagine my surprise when I
> started
> it
> > (carbs with
> > 51 jets and the chokes closed) the CAR IDLED PERFECTLY!!!!!!!!!!!!!
>  Smooth as
> > silk.  Then, as it warmed up and the chokes opened, back to the same
> crap.
> > Probably the same thing that happened with the other (50 jet) carbs
> > My second question is this:  This sure does point to the jets being too
> small,
> > right?  Sounds logical to me.  I thought about putting in #53's.  I saw
> > something in the
> > Clark's catalogue about using jets a size bigger because of today's
> crappy
> gas.
> > I only want to do this job once, so any and all thoughts and opinions
> welcome.
> > Thanx.
> >
> > Randy
> >
> >
> ==============================================================================================
> >
> >
> > Randy!!  Mainjets have nothing to do with idle / off idle
> >
> >
> > Do you have TWO  good streams of fuel when you snap the throttle open
> from
> each carb? [accelerator pumps ]
> >
> >
> > Also,  have you disconnected the down link on the passenger carb and
> then snap
> opened ONE carb at a time?  It may be only one carb...
> >
> But he can run down the freeway as long as he keeps light throttle.
> Doesn't that suggest that the  off-idle is ok?
> If the jets were ok, it should run fine when he mashes it in midrange,
> aside from any stumble caused by possible accelerator pump issues.
>
> Another thing - Won't headers and free-flowing mufflers tend to lean the
> mixture?
>
>
> --
> Jay Maechtlen SoCal '61 2-dr modified w/fiberglass skin, transverse 3.8
> Buick V6 TH440T4 trans
>
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