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10-19-2015, 08:04 PM | #1 |
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Join Date: Mar 2011
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91-99 Ford Carburetor
I have a 1939 Flat head in my 32 Ford , 39 tranny , some one installed a Offenhauser Dual Carb intake , with 91-99 Ford carb's , Non Progressive linkage , with a Mallory unlight dizzy (12 v ) @ 600 rpm's , timing set @ 6 deg & total 26 at 2,000rpm,
Plug's autolite 65 gap .030 If it has a bigger cam , it's not a race one , What would be a good start on Jeting ( for two carb's ) It seem around 2,800 rpm it bogging , I have not open up carbs yet , & power vale ?? Any suggestions will be appreciated and also on timing , @2,500 rpm About 55MPH , Does anyone now about what Mpg a average would be , It has About a G-60 size tire , I want to put the 18 inch rims back on but I was told they will not work with 38-41 juice Brake with out a adaptor ??? Thanks Last edited by 19ED30; 10-19-2015 at 08:38 PM. |
10-19-2015, 08:59 PM | #2 |
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Re: 91-99 Ford Carburetor
I would start out with 50 main jets and 3.5 power valves. Your timing specs sound very good.
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10-19-2015, 10:25 PM | #3 |
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Re: 91-99 Ford Carburetor
The hydraulic drums(40 and up) do require something to put the early wire wheels on, the 39 drum while being hydraulic has the wide spacing on the lug nuts.
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10-20-2015, 12:47 AM | #4 |
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Re: 91-99 Ford Carburetor
Are 50 stock carb jet's , & if So would they be to big in a Dual Carb set up ,
39 brake drum , I did a search , is this what you are describing 32 -39 wheel's need this style of drum ? |
10-20-2015, 01:21 AM | #5 |
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Re: 91-99 Ford Carburetor
The jetting doesnt depend on how many carbs your setup has.
You need the carb to give you the correct A/F mixture. The powervalve is vacuum controlled and that value is set by carbs/cam so has to be adjusted for a multiple/hotter setup. The suggestions given is a good start and a vacuum gauge is a very good tool for further testing. |
10-20-2015, 05:18 AM | #6 |
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Re: 91-99 Ford Carburetor
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10-20-2015, 09:17 AM | #7 |
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Re: 91-99 Ford Carburetor
Post-War drum like the one pictured often have counterweights that interfere with Ford spoke wheels. Those with the hub inside the drum are therefore preferred for wires. Good Luck: Fred A
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