Edelbrock Air Gap vs Edelbrock Air Gap RPM - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-07-2013, 08:54 PM
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Edelbrock Air Gap vs Edelbrock Air Gap RPM

Edelbrock makes the Air Gap 0-5500rpms and the Air Gap RPM 1500-6500rpms.. Is there really a big difference between the two? They both are Air Gaps and im sure the Air Gap RPM is more for the higher RPM's and the regular Air Gap is more for the lower RPM's... But is there anything else else that separates the two intakes from each other?

p.s. ive heard rumors that these intakes are not suitable for cold weather atmospheres/winter time but better suited for the summer time/hot weather atmospheres..

what are your takes on this??

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Old 02-07-2013, 09:11 PM
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If the car is a daily driver in a cold climate probably better off not using the air gap manifolds. If it is a weekend warrior or primarily for track use it would be fine. The regular air gap will give good power right from idle to 5K or 5,500rpm. The air gap Rpm will run a 1,000 RPM higher. Jst depends what motor it is on, which cam is in it and the intended use. Overall the air gap manifolds make good HP.
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Old 02-07-2013, 09:55 PM
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How about the Performer and the Performer RPM? Do you think those are better for both conditions??? And they did a comparison of the Performer RPM vs the Air Gap RPM and theres not that much of a HP/TQ difference between the two.

Differences In Power - Edelbrock
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Old 02-08-2013, 04:37 AM
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Both RPM intakes make power from 1500 to 6500 (regular and AirGap).

The regular RPM intake is the best. Makes power to 6500 and works well on a street car. AirGaps are very slow to warm up when temps drop under 60F which causes the engine to stumble at onset of acceleration.

The Performer makes power from 0 to 5500. But how often are you idling at 0 rpms?

If you have the hood clearance, run the regular RPM intake. I found the RPM makes more power than the performer, even on mild engines.
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Old 02-08-2013, 06:46 AM
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Here is a vid from Car Junkie doing a dyno comparision. Starts with victor single vs the rpm air gap, and then rpm air gap vs reg performer rpm.
Edelbrock Intake Manifold Dyno Test :: Single Vs Dual + Air-Gap Vs Regular - YouTube
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Old 02-08-2013, 07:13 AM
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We live in upstate NY and regularly drive our hotrods into october or even november. On the cold mornings when you roll it out of the garage, just let it idle while you wipe it down with your car duster, fold up the car cover or what have you. It doesn't take too long to get some heat into it and cure the stumble. My Brother has an RPM AG equipped 355 and it had a bad stumble, almost stalled on him leaving a stoplight one morning; but then he discovered his elec choke was bad. Replaced it and it helped some. But yeah, if its say 65 out, they need a little idle time. Never ever had trouble with one starting though and almost everyone I know has one on their street car around here.
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Old 02-08-2013, 11:20 PM
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I use an RPM Air Gap up here in the U.P. of Michigan and love it. It takes about a minute longer to warm up and I gained about 7 LB/FT and 13 HP with the Air Gap over the standard RPM. I won't switch back. It runs great on my 388 sbc.
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Old 02-09-2013, 05:16 PM
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I live in south Texas and my air gap took 15 minutes of driving before it quit stumbling. I could richen up the Carb and make it run better when cold but would run rich when warm.
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