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Old 03-30-2004, 07:47 PM
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air gap or victor

I have a 94 mustang 5.0 motor that will be going into my 63 fairlane with a EFI to carborator conversion. It will have a nice set of hooker super comp headers, 284hr-294hr camshaft, and 750 carb. My question is which would be the better intake manifold the performer rpm air gap or the victor manifold?

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Old 03-30-2004, 08:04 PM
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For a street machine with just the mods mentioned, you don`t need a open plane intake like a victor. I would use a performer RPM, and not a air gap, as I doubt on a street machine the air gap will make any noticable difference power wise. I would also use a 650 carb, 750 is a bit big for a little 302.
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Old 03-31-2004, 10:18 AM
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I have the air gap rpm on my big block and think it is well worth it if you are going with the rpm any way.

Here is the thing, it seperates your hot oil and coolant from your gas/air runners thereby giving you a denser charge. You will notice a difference on any car you put this on. I think it is awesome.

By the way, the Victor would be great if you are looking for from 3500 rpm and up but otherwise (on the street) you want a dual plane manifold. (rpm air gap) which is rated from 1500 rpm to 6500 rpm, a much more usable power band for the street.
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Old 03-31-2004, 10:26 PM
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I agree with doublevision meaning that I'd go with the RPM dual plane manifold and maybe ditch that 750 for a 650cfm or less carb. But there's no reason you can't just try that 750 anyway, and if the drive-ability is effected you can just simply bolt on a smaller carb. In regards to using the airgap manifold or not, I'd make that choice on your climate. Say if you lived in California, then I'd go with the airgap. But if you frequent very low ambient temperatures, then you could run into problems getting the fuel to stay atomized and in suspension with the air. Again poor drive-ability may result and would have to be compensated by running an excessively rich fuel mixture.

Last edited by club327; 03-31-2004 at 10:34 PM.
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Old 04-01-2004, 08:08 PM
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"YEAH", the dual plane air gap is the right choice as it won't sacrafice anything on the street. It has torque, R.P.M capability, and provides a cooler fuel mixture charge with it's elevated runner design. I will likely go with the 650 carb as it will flow closer to 700 cfm by the time the choke towers cut off and flowed.
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