I think you may be confusing the heat riser to the choke pull off. The heat riser is basically the same as the non-ram Chrysler. The ram engine uses heated exhaust gas (increased by the heat riser when cold) to heat up the choke pull off bimetallic spring, that in turn pulls off the choke butterfly. If you blocked off the exhaust input and output on the bottom of the intake manifold, and removed the choke spring, you would basically be starting on one choke, not both. Of course, depending on the ambient temperature when starting, it may not a be a problem. Also you could consider an electronic choke or a choke pull off cable. In short, there are work arounds. The only other consideration is that the intake manifold is physically supported by the exhaust connection, so perhaps some additional support may need to be provided so as to not have the manifold be only supported by the bolts going into the head.
From: Dan Akol [mailto:danakolaia@xxxxxxxxx]
Aside from the heat riser ports, how different are the these manifolds from similar ones without the ports (eg for single 4 bbl engines)? How critical is the heat riser?
Posted by: "Bob Jasinski" <rpjasin@xxxxxxxxxxx>
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