Edelbrock performer RPM or AIR GAP intake

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duster360

duster360

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Which intake is better for a weekend cruiser? Engine has J heads on it. Do I need the exhaust heat crossovers that the RPM intake has or would I better off with the air gap intake that doesn't have them?
 
I have an air gap on mine...but if you drive yours when it's cold out, the heat crossover might benefit you.
 
I have a 340 with an air gap and one with plain performer RPM. In the fall the air gap 340 takes a couple more minutes to idle on its own but all and all I don't see a big difference @ all. Im running HP carbs w no choke, so I expect them to be a little cold blooded
 
Thanks for the info fellas. I guess I will pick up whichever comes up for sale first then.
 
I doubt if the air gets cold enough down there, we had a ruff winter up here and my air gap worked real well.
 
[ame="https://www.youtube.com/watch?v=i2DvnoHWagk"]Edelbrock Intake Manifold Dyno Test :: Single Vs Dual + Air-Gap Vs Regular - YouTube[/ame]
 
pertaining to hood clearance,the RPM will fit where the airgap won't.
 
Air gap fits with no issues on mine...no scoop or anything. Fit in my brother's 340 Scamp too...both using a 14x3" element Edelbrock drop base air cleaner.

Follow up: just looked at the Edelbrock website-they spec the carb mounting height at 5.35" on both intakes...RPM and Air Gap...4.9" A, 5.8" B (front to rear).
 
I went with the non air gap for the more stealthy look. unfortunately that all goes out the window when i fire it up. lol
 
I have run both the RPM and the RPM Air-gap on my car....there was no difference in ET or MPH at the track. They both work great.
 
Have any of you guys cut down the plenum divider on your air-gaps? Did it make a difference? What about sharpening it to a knife edge to help flow?
 
@jmwuva05 disagree all you want, people have done it...case in point in link below

dual plane divider

as to whether or not it helps, I believe the alleged reason is to alleviate potential mixture distribution problems, but I've never experienced that...
 
txstang84 said:
@jmwuva05 disagree all you want, people have done it...case in point in link below

dual plane divider

as to whether or not it helps, I believe the alleged reason is to alleviate potential mixture distribution problems, but I've never experienced that...
Click to expand...
Post is almost 8 years old, kinda late to reply now. I'm sure that the issue was solved year's ago
 
Dan the man said:
Post is almost 8 years old, kinda late to reply now. I'm sure that the issue was solved year's ago
Click to expand...

The disagree stamp was yesterday at 255...

disagree.jpg
 
That is exactly what my engine builder is doing I was just co firming that is what others on here have done
 
duster360 said:
Thanks for the info fellas. I guess I will pick up whichever comes up for sale first then.
Click to expand...
It’s a win win. The AG should be just fine down south. The regular RPM that heats the intake up will be good for a vehicle that is more gear round and closer to daily rather than weekender. This is a plus in the winter when I gets down right chilly to cold.
 
Old posts are dragged out of the basement because someone is researching, trying to find whatever info or tidbits they’re looking for. No different than thumbing through back issues of old magazines or books for articles on various topics, whether you’ve already read them before or not.
An added bonus is you likely will have any number of long gone past members with maybe valuable input or takes on things.

Or some can be the “old post” hall monitor.....could be when you don’t really have much to add to the topic I guess you gotta have something to post:rolleyes:
 
I like to joke about “Raising the dead” for time to time. I think It’s good they come up.
 
Woods74 said:
[ame="[MEDIA=youtube]i2DvnoHWagk[/MEDIA]"]Edelbrock Intake Manifold Dyno Test :: Single Vs Dual + Air-Gap Vs Regular - YouTube[/ame]
Click to expand...

That link looked weird so I reformatted it, Edel RPM for the win when you save $100 over a used RPM air-gap...

 
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