Mechanical pump heat shield: see attachment Mike On 8/30/2020 10:42 AM, 62-65-mail-list-club@xxxxxxxxxxx wrote:
Good tips Gary. Here are 2 references: Don Dulmage’s old post on shielding the mechanical fuel pump: http://www.1962to1965mopar.ornocar.com/poly318fuelpumpshield.html 1 3/8ths laminated wood spacer: "The carburetors were so hot from the engine even with the Swirl Torque aluminum spacers that they would evaporate the bowls empty in a short time after shutting down. At the time the only spacers I could find for the bolt configuration of my manifold were made of aluminum so I made my own 1 and 3/8" plywood spacers from MDX and that reduced the bowl temps from 180 degrees to 110 degrees -- Rich Kinsley http://www.1962to1965mopar.ornocar.com/images/mmo520166.jpg I don't have a photo of Rich Kinsley’s electric fuel pump shield that I can find right now. Thanks, Gary H.-------Original Message-------Hi Larry,Firstly, the 1964 Barracuda NOS carb may not be suitable for unleadedfuel and some of the gaskets have decayed/gummed-up or you are experiencing the common fuel percolation “when HOT” and need to shield your carb from excessive intake/exhaust manifold heat transfer; a simple wood/phenolic resin spacer under the carb and a thin aluminum “heat shield” would suffice. Also shield your fuel pump with the thin aluminum heat shield on both vehicles.Secondly, your ’74 Charger would benefit from the same modificationsto reduce heat transfer to the carb and fuel pump…remember Don Dulmage’s old post on shielding the mechanical fuel pump?And Rich Kinsley’s electric fuel pump shield when placed at rear ofthe vehicle and near exhaust/muffler components.I suggest trying these inexpensive common-sense approaches first;especially wood/phenolic resin carb insulators. Laminated hardwood/plywood is your best heat insulator, bar none. A Rich Kinsley 1 3/8ths laminated wood spacer cut 80F degrees of heat transfer from the intake manifold to the carburetor float bowls; and the Thermoquad carb phenolic resin float bowl “does” reduce fuel temp by 20F…as claimed by the factory. There is immense power in a cooler fuel charge; for every 1F degree of fuel temp reduction there is a 1% increase in gross HP down to a fuel temp of 50F; no benefit after 50F. Heat reduction/transition coatings on interior & exterior engine parts and components yield huge power gains and promote longevity of engine parts. For example; exterior heat barrier and plenum & intake runner coatings on a single four barrel aluminum manifold dropped the plenum temps to an unheard of 68F; this number taken immediately after engine stand run-in on a HOT engine seconds after shut-down.Gary P. FROM: 'Larry Ashbaugh' I have a problem with a couple of my cars, and it seems to be similar:When the car starts, it runs decently, but after it gets hot, it stalls. When re-started, it wants to stall. This is on a 64 Barracuda (Slant 6, 1bbl carb, automatic), and a 74 Charger (318, 4bbl, automatic).I was thinking it could be the float? on the Barracuda, as I recentlychanged the carb with a NOS carb before the issue began. However, this just started on the Charger, which has an Edelbrock 4bbl carb. Neither are used or started much, and the gas is pretty old....Larry
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