Re: 1962 300H.P. intake manifold gaskets
Hi Will, The seasonal blends probably do have an effect, but I believe my car ran poorly all year. It would falter up hills on aviation fuel. The engine ran at about 190 degs, but I tried to lower the temps with a new Direct Fit radiator, new fan clutch, distributor checked by Don Baker, removed the plate in the heat riser, installed a phenolic spacer under the fuel pump, I already had the phenolic spacer and stainless plate under the AFB. The carburetor flange was 177 degs, manifold heat passage 235 degs carb bowls 138 and 143 degs. Putting plugs in the manifold under the AFB lowered temps in the carb flange 7 degs. Car still ran poorly. I did seem to fix the problem by totally blocking the intake heat passages with stainless plates. I did this after noticing the performance was improved by temporarily running a rubber hose from the fuel pump to the carburetor. I figured fuel temp must have lowered. The manifold heat passage is now 145 degs, carb flange is 137 degs. The float bowls, though, are only about 5 degs lower. The steel fuel line, is about 180 degs measuring just above the valve cover. I should probably try to shield the line. Also I am curious if the new reproduction fan clutch that has just been made available would cool a few more degs? I had at one time thought I had a fuel pressure problem, that turned out to be the oil filled pressure guage. When the oil in the guage heated, the pressure read dropped. Ken
Hi Will, The seasonal blends probably do have an effect, but I believe my car ran poorly all year. It would falter up hills on aviation fuel. The engine ran at about 190 degs, but I tried to lower the temps with a new Direct Fit radiator, new fan clutch, distributor checked by Don Baker, removed the plate in the heat riser, installed a phenolic spacer under the fuel pump, I already had the phenolic spacer and stainless plate under the AFB. The carburetor flange was 177 degs, manifold heat passage 235 degs carb bowls 138 and 143 degs. Putting plugs in the manifold under the AFB lowered temps in the carb flange 7 degs. Car still ran poorly. I did seem to fix the problem by totally blocking the intake heat passages with stainless plates. I did this after noticing the performance was improved by temporarily running a rubber hose from the fuel pump to the carburetor. I figured fuel temp must have lowered. The manifold heat passage is now 145 degs, carb flange is 137 degs. The float bowls, though, are only about 5 degs lower. The steel fuel line, is about 180 degs measuring just above the valve cover. I should probably try to shield the line. Also I am curious if the new reproduction fan clutch that has just been made available would cool a few more degs? I had at one time thought I had a fuel pressure problem, that turned out to be the oil filled pressure guage. When the oil in the guage heated, the pressure read dropped. Ken
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