Re: IML: Big Block Red Hot Manifolds

["Rob P" <fristpenny@xxxxxxxxxxx>]

Plugged exhaust is a good suggestion.  One thing to consider is that the 
timing might be off because the balancer slips.  It's never happened to me 
(knock wood, it probably will tomorrow), but the rubber on the balancer can 
slip causing the timing marks to be way off and the timing will be off when 
set to factory specs.  IF the car is running well you can probably discount 
this,

Rob

> From: Mike Pittinaro <mechimike@xxxxxxxxx>
> Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Subject: Re: IML: Big Block Red Hot Manifolds
> Date: Wed, 29 Jun 2005 10:22:54 -0700 (PDT)
>
> No catalytic converter on this one.  But the muffler
> or pipes could be plugged.  I'll check.
>
> Timing was just set at factory spec, so I rule that
> out.
>
> Thanks!
> -Mike
>
> --- Christopher H <imperial67@xxxxxxxxxxxxx> wrote:
>
> > Mike,
> >
> > I tend to think a defective or clogged catalyst is
> > behind this, but that
> > usually accompanies a car being way down on power.
> > Does your car have a cat?
> >
> > Coolant temperature is not likely the cause. Your
> > coolant won't get much
> > hotter than 250F, whereas your combustion occurs at
> > 2,400F or so. And I'd
> > think super-lean running would not be smooth at
> > idle.
> >
> > Check downstream first... And start with the cat.
> > Let us know, please!
> >
> > Chris in LA
> > 78 NYB Salon (400 w/cat)
> >
> >
> > On 6/28/05 8:57 PM, Mike Pittinaro at
> > mechimike@xxxxxxxxx wrote:
> >
> > > Anyone care to lend a helping word of advice on
> > what
> > > could cause both manifolds on a 1978 400 cu in big
> > > block to glow red?
> > >
> > > Timing is set to the spec, new t-stat, new fan
> > clutch,
> > > radiator flows OK, belts/hoses OK and lower rad
> > hose
> > > has the internal spring.  New plugs and wires.
> > Engine
> > > reverse flushed and new coolant installed.  New
> > vacuum
> > > lines and stoppers.  Engine has a thermoquad
> > > carburetor.
> > >
> > > My own thoughts are a cracked base of the carb, or
> > > possibly a leaking intake manifold, something that
> > > would cause a lean-running situation.  Engine
> > seems to
> > > idle OK though, and has decent power.
> > >
> > > --Mike Pittinaro
> >
> >
> >
> >
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>
>
> --Mike Pittinaro
>
> "The Surrealist seeks Kittens, runs on Alcohol, and has Three Metal 
> Wheels."
>
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