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Author
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Topic: Edelbrock intakes
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Kyle
Gearhead Posts: 400
From: Sumner, WA
Registered: Dec 2001
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posted 02-05-2004 02:58 AM
   
I have two questions.1. I noticed that on regular RPM intakes, the dividing plenum is all the way to the carb pad, but on RPM Air-Gap manifolds, there is a notch cut out in that divider, which I assume is to balance the sides at higher RPM's. Whats the deal? I thought the Air-Gap was just an RPM with the stuff cut out underneath. 2. A reccomendation for an intake; 5.0L long-block, XE276HR cam (224/230, rated at 2200-6200), 650 D/P carb, drag racing only; do I want a dual plane (Performer RPM or Stealth) or single (Torker or X-CELerator)? I have a Vic. Jr, but I think thats too much. I'm going to a swap meet Sat. and will be looking for something. ------------------
Kyle Laramore '63 Fairlane: Under Re-construction '66 Mustang Coupe: 289, Offy intake, Crane Blazer hyd. camshaft, Autolite 4100 carb, Headman long tube headers, 3spd tranny, 8" rear, 3.80 gears '70 Mach 1: 351C-2V, Weiand intake, 750 holley, Flowtech long-tube headers, MSD ignition, C6 trans, CJ converter, 9" track-loc rear, 3.50 gears, Flowmaster 2.5" mandrel exhaust w/ 3-chamber mufflers Words to build engines by: "Never Assume!" My Photo Page
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Ryan Wilke
Gearhead Posts: 2060
From: Stanton, Michigan 49707
Registered: Oct 2000
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posted 02-05-2004 08:48 AM
quote:
Originally posted by Kyle:
I have two questions.1. I noticed that on regular RPM intakes, the dividing plenum is all the way to the carb pad, but on RPM Air-Gap manifolds, there is a notch cut out in that divider, which I assume is to balance the sides at higher RPM's. Whats the deal? I thought the Air-Gap was just an RPM with the stuff cut out underneath. 2. A reccomendation for an intake; 5.0L long-block, XE276HR cam (224/230, rated at 2200-6200), 650 D/P carb, drag racing only; do I want a dual plane (Performer RPM or Stealth) or single (Torker or X-CELerator)? I have a Vic. Jr, but I think thats too much. I'm going to a swap meet Sat. and will be looking for something.
Kyle,
I'm sure you & most of the rest here have more experience with this than me, but - I'll give you my thought to your questions: #1) I believe you're correct that the divider is cut down a bit to help balance out the runner charges at higher rpms and also to eliminate the problem that some carbs with large secondary butterflys may hit on the divider. #2) Of your choices, I'm sure most folks would say go with the RPM. That would also be my first choice. However, if you already have one or can borrow one, I'd also try the Stealth as some folks really like them. Because your cam quits at 6200rpms, I wouldn't bother with any single plane manifold. JMO,
Ryan 
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Moneymaker
Administrator Posts: 25883
From: Lyons, IL, USA
Registered: May 99
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posted 02-05-2004 09:54 AM
Keep your Vic Jr and use it with a 4 hole one inch spacer. Plan ahead. I am sure you are going to eventually upgrade the heads.
If I was going to install from scratch,and keep the stock E7TE heads forever, then I would use a Air Gap.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
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NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
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Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
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www.moneymakerracing.com
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FiveOFastback
Journeyman Posts: 93
From: Bethlehem, PA, USA
Registered: Nov 2003
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posted 02-05-2004 04:27 PM
Go with the RPM Air Gap, better low end torque over the Victor or Stealth, unless you have huge CC heads to have the need for a single plane, I think you would be more satisfied with a dual plane. Just my 2cents
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68DARKHORSE
Gearhead Posts: 422
From: Austin, Tx
Registered: Aug 2002
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posted 02-06-2004 05:58 PM
The Air Gap is taller than the RPM. It's like a cross between the RPM and the Jr.
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 02-06-2004 06:16 PM
I would keep the Vc Jr intake. KK's motor is only shifted at 6000 rpm and it works great with the Vic Jr and a 1" 4 hole spacer. I just think you will be going backwards if you change intakes.
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 02-06-2004 08:34 PM
I vote for the Vic Jr too.
Later you can get the matching VicJr heads and kick some but. SteveW
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Kyle
Gearhead Posts: 400
From: Sumner, WA
Registered: Dec 2001
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posted 02-09-2004 01:41 PM
Steve- I already have the matching Vic. Jr heads. I just can't afford the matching compression ratio, matching camshaft, or matching JPT converter right now. Some day, though. (I wanna build one like yours!)So the Vic Jr will be ok? I would think it would really kill the low end. The cam doesn't seem too big to me (i.e. it makes power at lower RPMs). Since the car is a footbrake car, I thought the dual plane would be a better choice. But I guess all it would cost me is an intake gasket and a couple hours to find out, huh? Why only a 1" 4-hole, not a 2"? I found a set of GT-40s cheap this weekend, so they will be going on the engine. ------------------
Kyle Laramore '63 Fairlane: Under Re-construction '66 Mustang Coupe: 289, Offy intake, Crane Blazer hyd. camshaft, Autolite 4100 carb, Headman long tube headers, 3spd tranny, 8" rear, 3.80 gears '70 Mach 1: 351C-2V, Weiand intake, 750 holley, Flowtech long-tube headers, MSD ignition, C6 trans, CJ converter, 9" track-loc rear, 3.50 gears, Flowmaster 2.5" mandrel exhaust w/ 3-chamber mufflers Words to build engines by: "Never Assume!" My Photo Page
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