I guess I have to clear up a few facts about these cars.
Fact 1. The foil wrapped pad under the intake is not there to
insulate anything. It’s a silencer pad to mask some valve train noise. The
valley pan certainly does not need to be insulated from cross-over heat. It
would be cooler without the pad and air flow going through it. Small block
Mopars have oil from the lifter valley splashing directly on the bottom of the
intake, except for one piece of tin directly under the crossover passage. Check
the parts book and it calls the pad a silencer.
Fact 2. 60-61 Ram cars have a heat riser valve in both
manifolds. 62-64 short ram cars with headers just have tubes with a restrictor
on one of them. I drove a G for over 20 years and thousands of miles, and never
flooded it. When set up properly, the ram system is quite reliable. They
were no more troublesome than any other brand with multiple carbs, probably less
in some cases. They were also never sold in anything coming close to large
quantities, and the original owners likely knew what they were getting into. The
big problem is lack of mechanics qualified to work on them, back then and now.
Fact 3. I don’t have an H so I can’t vouch for how those carbs
are set up, but I do have an E (the intake and carbs are on my kitchen table),
and both carbs have an idle circuit, and idle air screw. Only one has a choke
though. The linkage opens in stages with the front barrels of the rear carb
working first, then the front barrels of the front carb, then at wide open all
eight. They do not go from 2 to 8. Ram cars are 4 all the time and 8 at full
throttle. My C also has idle circuits on both carbs and won’t run right on only
the rear carb. I found that out when the connecting fuel line went and I tried
to run it on the rear carb only. It ran but idled rough.
That’s my rant for now. Did I miss anything?
Don Verity
C(2), E, F, J
From: kmaniak@xxxxxxx
Sent: Thursday, January 30, 2014 2:01 PM
Subject: Re: [Chrysler300] Manifolds and carbs
Mike:
The foil wrapped insulation pad between the underside of the intake
manifold and the valley cover was placed there in the factory to keep the heat
from the exhaust passage from transferring downward into the valley. They
are/were present in all my big block cars, except rams.
When you say your heat riser valve was removed, do you mean they pulled out
the butterfly and left the empty shaft, or did they remove the valve and shaft
and fill in the shaft holes in one manner or another? Just
curious...
Chris
-----Original
Message----- From: Michael Moore <mmoore8425@xxxxxxx> To: John Grady <jkg@xxxxxxxxxxxxxxxxx> Cc: kmaniak <kmaniak@xxxxxxx>; 300 <Chrysler300@xxxxxxxxxxxxxxx> Sent: Thu, Jan 30, 2014 10:29 am Subject: Re: [Chrysler300] Manifolds and carbs My 300H had a very thick insulation pad made from
some sort of fiberglass, or asbestos wool in an heavy aluminum foil envelope
under the intake manifold and extending outthe back. It seemed to me to be
factory made, but can't be sure. I've always wondered what had happened to cause
the manifold heat valve to be removed, the choke to be converted to manual, and
I had assumed that pad was all part of it.
When I got the car, my neighbor, who was an older mechanic and who
was knowledgeable, commented that I should just use the choke to get it started
and get it off choke as soon. Big engones, he said, don't need much choke once
running (?).
My drivers side seat was raised up wooden blocks under each corner. The
original owners was a Navy fighter pilot (F4H) who was killed in 1966, and I got
it from his family. Mike Moore
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