Re: rough idle

[Gary Pavlovich <glpavlovich@xxxxxxx>]

Jim,

If you want it all original and retain your same mileage and driving habits 
then rebuilt the 2bbl.

If you want to experience more of what your 383 is capable of and have some 
performance fun all within the parameters of your same stock/original 
appearance then by all means change to a cast iron original four barrel 
manifold and older AFB carb.

The cast iron original manifolds are dirt cheap and the carb doesn't have to 
be a 1963 model but just not a shiney new Edelbrock and never a Holley to 
keep your car looking stock/original.

You can easily find your manifold and car from people on this list - hey 
guys, help him out with that heavy iron you've been kicking around for years 
in your garage - or from swap meets or E-bay.

With regards to performance, it is night and day difference; you will be 
thrilled. You will have smooth powerful acceleration that doesn't quit and 
passing gear to get on your freeway/expressway is a blast.

If you keep out of the secondaries one week just to test the mileage, you 
will probably be the same or better than your two barrel; it is nice to have 
economy and power on demand at your disposal.

My opinion from experience as I was in your situation/shoes/mindset at one 
time.

Gary Pavlovich


----- Original Message ----- 
From: "Jim Altemose" <jaltemoose@xxxxxxxxx>
To: "1962to1965mopars" <1962to1965mopars@xxxxxxxxxx>
Sent: Thursday, September 04, 2008 8:00 AM
Subject: Re: rough idle


> What to do, what to do?  I have a 63 Polara 500 with a 383 and BBD
> 3475s carb.  It just developed a rough idle, after warming up.  I
> hooked a tach up and it's idling around 300 RPM.  I realize it should
> 500 RPM, but I found the idle adjust screw is already all the way in;
> the previous owner must have done it.
>
> I'm waffling between:
> a) extract the venturi mechanism and clean the idle tubes
> b) rebuild the carb
> c) replace manifold and carb with a more powerful 4 barrel
>
> I'd been planning on replacing the manifold and carb with something
> beefier than the 2 barrel, but not for a while.  If I did this, I'd
> want to keep it period correct; it's a very original car.  Any
> recommendations on where to get a correct manifold and carb?  I guess
> I'd want a Carter AFB?  Any thoughts on how much performance I might
> pick up over the BBD 2 barrel?  How much advantage might a new Eddy or
> Holley have over an old Carter?  I've already replaced the 5/16 fuel
> line with 3/8.
>
> I'm thinking I'll try cleaning the idle tubes first and see if that
> quick fixes it.
>
> As always, thanks.
>
> - Jim
>
> On Wed, Sep 3, 2008 at 2:51 PM, Jim Altemose <jaltemoose@xxxxxxxxx> wrote:
> > I have a 63 Polara 500 with a 383 and BBD 3475s carb.  It just started
> > idling rough when I stop.  It's steady, but rough; shakes the car back
> > and forth a bit.  I was planning on following the service manual which
> > says adjust idle screw to 500 RPM, then adjust two idle mixture screws
> > till it goes lean, then adjust back and re-adjust idle screw to 500
> > RPM.
> >
> > But I was reading some things on line about the the Carter BBD carbs
> > being very common to have the idle filler tubes in the venturi clog.
> > Anyone have experience with this?  Is removing and cleaning the filler
> > tubes the first thing to try?  Any tricks to this?
> >
> > As always, thanks.
> >
> > - Jim
> > Jim Altemose, Long Island, NY
> > '63 Polara 500 (Max Wedge)
> > '63 Polara 500 (383)
> > '65 Belvedere I (Street Wedge)
> > '71 Bronco
>
>
> ----
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>
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html.


----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.