RE: IML: Big Block Red Hot Manifolds

["Rob P" <fristpenny@xxxxxxxxxxx>]

That's good. Glad it was a simple fix.  It'll probably be much nicer driving 
to Carlisle without all that glowing under the hood.  Sorry I'll miss it 
this year.  I actually have two running Imperials registered and insured, 
but I have a party.  Boo hoo.  See you next year.

What Edelbrock would you consider using? The TQ is spread bore, so maybe you 
could use the Q-Jet copy, but I'm not sure. If you try to use a square bore 
AVS or AFB, I think you'd need to swap manifolds or use an adapter.

Rob

> From: Mike Pittinaro <mechimike@xxxxxxxxx>
> Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> To: Otis Davidson <otisdavidson@xxxxxxxxxxx>, 
> mailing-list@xxxxxxxxxxxxxxxx,  dardal@xxxxxxxxxxxxxxx
> Subject: RE: IML: Big Block Red Hot Manifolds
> Date: Fri, 8 Jul 2005 06:25:04 -0700 (PDT)
>
> I found the problem was solved by richening up the
> Thermoquad mixture screws and advancing the timing.
> Took it out for a test drive last night and the temps
> (with a 180 stat) stayed at 190 even after prolonged
> high speed driving.  And no more orange
> manifolds!Timing had been set at 4 degrees BTDC spec,
> but it works much better at about 7 or 8 with todays'
> gas (vs 1978 gas) and the TQ carb will eventually get
> rebuilt or replaced with an Edelbrock, but for now it
> seems to be OK.
>
> --- Otis Davidson <otisdavidson@xxxxxxxxxxx> wrote:
>
> >    Remember a while back when the Bus was doing the
> > same thing?   It was a
> > lean condition caused by the factory Holley that was
> > on it.  I had 30 or so
> > miles to go,and tried my best to richen it up,to no
> > avail.
> >
> >   The fix:  Install one of my aftermarket Holleys on
> > it.  A 750 cfm
> > 4160-3310 with vacuum secondaries.   No more
> > orange-hot manifolds after
> > that.
> >
> >
> > "otis"  <--'79 440 powered 35 ft RV
> >
> > ----Original Message Follows----
> > From: Mike Pittinaro <mechimike@xxxxxxxxx>
> > To: mailing-list@xxxxxxxxxxxxxxxx
> > CC: otisdavidson@xxxxxxxxxxx
> > Subject: Big Block Red Hot Manifolds
> > Date: Tue, 28 Jun 2005 20:57:47 -0700 (PDT)
> >
> > 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.
>
>
>
>
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