performer vs air gap

[jdietschweiler]

I've had both "in a square bore" the airgap pulls like a **** in the high rpms
Well until the valves started to at 6500. This was with a stock 350 vortec heads"97-99" an elgin .480x2 cam and a 650dp. Just sayin'.... had a real hard time keeping it under a stock hood with a nitrous plate. Ended up usind a carb hat and cold air setup.still hadto cut the bracing from under the hood.

 

[online170]

They are exactly the same height. it only looks larger. runners are the same exact length.

Yea youre right. Im confusing the performer and the RPM.


From Edelbrock;

The RPM AIR GAP;

Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 650-800 cfm (see Carbs & Accessories), use bracket #8031 or #8036 for 1972-78
Installation Notes: Use #8504 Edelbrock bolt kit. Recommended intake gasket: Edelbrock #7201. Manifold height: A-4.20", B-5.25" (same as #7101), see A/B Measurements. Port exit dimensions: 1.14" x 1.95".


(A+B)/2 = 4.725inches.

Same for the non air gap.

 

[online170]

Just to clarify, according to their website, Edelbrock makes a Performer and a Performer Air Gap in a spreadbore design. Edelbrock also makes a spreadbore Performer RPM, but the Performer RPM Air Gap only comes in square bore.

So the answer is easy then. If he wants a performer RPM, he can only choose the RPM non-airgap.

 

[CHRIS.O]

Buy the RPM and cut out the section in the plenum divider yourself. I will search for the video but David Freiburger (ex editor for car craft) has a dyno series on youtube, he did this and ran the same engine with the rpm with divider cut out and the air gap, not much of a difference.

 

[mobileaudio25]

thanks for the tips/advice guys. I also noticed that the rpm range on the air gap is idle-5500 or 1000-5500 depending on which design. My cam is 1500-6500 so in essence wouldnt switching form the rpm performer (1500-6500) to the air gap decrease my performance?

 

[CHRIS.O]

http://www.youtube.com/watch?v=i2DvnoHW ... ature=plcp

Watch this video, it will answer your questions.

 

[JBreu]

thanks for the tips/advice guys. I also noticed that the rpm range on the air gap is idle-5500 or 1000-5500 depending on which design. My cam is 1500-6500 so in essence wouldnt switching form the rpm performer (1500-6500) to the air gap decrease my performance?

Get the performer rpm air gap, this is made for the 1500-6500 range.....I'm running this one and my motor does quite nicely 8)

 

[mebe007]

simple enough get there performer rpm if you want to save money. You have to get the performer rpm to run a qjet as the rpm air gap isnt made with that pattern. or you can run a 1" q jet adapter plate. your choice. stay away from the standard performer manifold though (note: not the rpm) as it is essentially an aluminum glorified stock manifold.

Performer RPM for Spreadbore (Qjet)
http://www.summitracing.com/parts/EDL-7104/
$179.95

Performer RPM for Squarebore
http://www.summitracing.com/parts/EDL-7101/
$149.95

Performer RPM Air Gap for Squarbore
http://www.summitracing.com/parts/EDL-7501/
$219.95

you can see here how my plenum wall divider was milled down. normally its flush with the top of the flange. the airgarp manifold isnt milled this drastic though

hope this helps

 

[AlanB]

thanks for the tips/advice guys. I also noticed that the rpm range on the air gap is idle-5500 or 1000-5500 depending on which design. My cam is 1500-6500 so in essence wouldnt switching form the rpm performer (1500-6500) to the air gap decrease my performance?

Yes.

 

[Phoenyx]

Both the Performer RPM and the Performer RPM Air Gap have the same 1500-6500 RPM range.