Need help with timing/dist curve
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Joined: Jul 2010
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Need help with timing/dist curve
Hello everyone, I am having trouble getting my timing set properly on my 78 F-150 351M 2bbl. I have it set where it runs decent but I have trouble driving up to the mountains. My engine is a crate motor and has a new distributer in it. The elevation where I live is about 5,000 feet and I have a steady 16" of vac. I have tried adjusting my 2 year old carb and eliminated egr and other emissions, but still have no luck. I have my vac advance to the ported side of the carb. Could someone give me some advice. Thanks.
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Timing is set at about 11degrees initial, gear ratio is 3.50, 4 speed manual tranny and 33" tires. It drives perfect around town but when I start climbing and the engine gets under load it begins to loose power and sputter.
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Joined: Apr 2008
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From: Big Sky Country
Do you know where your total timing is set? i'm assuming somewhere between 32-36 degrees, your pcv should be plumbed to manifold vacuum, 3.50 gears would be better suited to a 31" tire and vice versa 33" tires to a 3.73 gear as far as climbing steep grades anyways, this almost sounds like a fuel starvation issue though, weak fuel pump, worn cam eccentric, plugged filter, etc.
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Post Fiend
Joined: Apr 2008
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From: Big Sky Country
Does your distributor have an adjustable vacuum advance cannister? if so it will accept a 3/32" allen wrench thru the vacuum port and allow you to "tune" it for your specific needs and change the distributors curve, what size reluctor arms are you running inside the distributor, 10L, 13L, 15L?
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Post Fiend
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From: Big Sky Country
Duraspark_distributor_recurve_instructions_index
