2 carburetor spacer

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Carburetor Spacer #8712 Open Center 2in Thick

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Details

The Edelbrock Carburetor Spacer #8713 4-hole design enhances low-rpm torque and throttle response and dampen reversion effects on the carb. The Edelbrock #8711 4-hole spacer is 2" thick and made of Black Phenolic Plastic.

Specs

Availability Available
Application Universal
UPC 00085347087129
Mounting Hole Quantity 4
Mounting Hole Diameter 0.344 in
Quantity Sold Individually
Barrel Quantity 4
Type Open Center
Spacer Finish Plastic
Availability Note Available to Order
Warranty 12 Months
Emissions Code
Hazardous Materials WarningWARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
Material Phenolic Plastic
Shape Square Bore
Thickness 2.00
Sours: https://www.edelbrock.com/carburetor-spacer-4150-style-2-open-spacer-black-phenolic-plastic-8712.html

1/2″ Holley 2BBL Open Plenum Carburetor Spacer RWA1222C

1/2″ Holley 2BBL Open Plenum Carburetor Spacer RWA1222C

RWA1222C 1/2″ Holley 2BBL carburetor spacer is required when bolting a Holley carburetor onto a stock 2300 2bbl intake manifold (when the EGR plate is removed). This spacer will also work on on any intake manifold that has the 2bbl Holley bolt pattern.  The spacer is designed with a small tapper, this helps with fuel flow and helps create a better plenum under the carb. The spacer is cast aluminum with machined surfaces.

Includes:

  • Carburetor spacer
  • Gaskets
  • Carb studs, nuts, washers

SKU: RWA1222CCategories: Carburetors, Carburetors, Carburetors Etc., Manifolds/Intakes, Spacers, Spacers

Description

RWA1222C 1/2″ Holley 2BBL carburetor spacer is required when bolting a Holley carburetor onto a stock 2300 2bbl intake manifold (when the EGR plate is removed). This spacer will also work on on any intake manifold that has the 2bbl Holley bolt pattern.  The spacer is designed with a small tapper, this helps with fuel flow and helps create a better plenum under the carb. The spacer is cast aluminum with machined surfaces.

Includes:

  • Carburetor spacer
  • Gaskets
  • Carb studs, nuts, washers

Additional information

Weight2 lbs
Dimensions8 × 7 × 2 in

Related products

Sours: https://racerwalsh.com/product/1-2%E2%80%B3-holley-2bbl-open-plenum-carburetor-spacer-rwa1222c/
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Carburetor Accessories and Components - Carburetor Adapters and Spacers

Pit Stop USA offers Carburetor Adapters and Spacers at low everyday prices.

Carburetor Accessories and Components - Carburetor Adapters and Spacers - Carburetor Adapters

Carburetor Adapters

Whether you want to run a Holley 4150 on a 4500 Dominator Manifold, turn your carb sideways, or mount a two barrel on a four barrel manifold, PitStopUSA.com has a huge selection of carburetor adapters to choose from.

Carburetor Accessories and Components - Carburetor Adapters and Spacers - Carburetor Spacers

Carburetor Spacers

Carburetor Spacers from PitStopUSA.com are used for everything from air cleaner clearance to fine tuning the torque curve of your engine. We have a huge selection of aluminum, phenolic and wood...More Details »

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Pit Stop USA offers Carburetor Adapters and Spacers at low everyday prices.

Sours: https://pitstopusa.com/c-1215434-4874-air-fuel-system-carburetors-and-components-carburetor-accessories-and-components-carburetor-adapters-and-spacers.html
SBF CARB SPACER \u0026 INTAKE TEST

CARBURETOR SPACER, 1/2 IN., BILLET ALUMINUM

Out of stock

$56.87

4150/4160 Carburetor Spacer, Billet 1/2" Thick, Open Plenum Design

  • Extends length of intake mixture column to improve air/fuel distribution
  • CNC machined from 6061-T6 billet aluminum to extremely accurate specifications
  • Billet aluminum eliminates porosity and improves engine appearance
  • 4150/4160 Series Holley&reg bolt patterns to fit a variety of carburetors
  • 4150/4160 Series Spacers 1/2" thicknesses with open plenum design
  • Open designs increase plenum volume for improved high rpm power
  • Gaskets are not included

*Not legal for sale or use on pollution-controlled vehicles

To Purchase any of these products please go to Related Products below.

PART NO.AVAILABLE OPTIONS
93300Carburetor Gasket, 4500/4160 Open (2 Required)
93301Carburetor Gasket, 4500/4160 4 Hole (2 Required)
93310Carburetor Gasket, 4500/King Deomon Open (2 Required)
37950Bullet Nose Carburetor Stud Kit
37960Bullet Nose Carburetor Stud Kit
37961Bullet Nose Carburetor Stud Kit
Sours: https://www.moroso.com/4150-4160-carburetor-spacer64985/

Carburetor spacer 2

Pit Stop: How Carburetor Spacers Affect Performance

| How-To - Engine and Drivetrain

QUESTION

I'm constantly reading about the benefits of using spacer blocks on street rods between the manifold and carburetor, but I'm wondering how spacer thickness and design—open versus four-hole, for example—affect performance. Also, I've read about many "carburetor replacement" EFIs that use carb-style manifolds, but I've never heard if these types of units would also benefit from the increased plenum area offered by spacer blocks. Could you shed any light on all of this?

Eddie Otanez
Via email

ANSWER

Spacers are said to improve air/fuel vaporization through and out of the carburetor. Anytime the air/fuel charge has to turn sharply coming off the carb, it increases the chance of separating the fuel from the air. If there's big drops of wet fuel instead of an ideal fine, homogeneous mist, performance will be adversely affected. By raising the carburetor higher, there is more time for the fuel to gently turn in to the intake runners, plus less chance of the charge bouncing sharply off the plenum floor. Additionally, changing the effective intake plenum volume and height with a spacer may change the intake manifold's tuning resonance, somewhat analogous to playing with exhaust header tube and collector lengths and volumes. Spacers also have an insulating affect, tending to cool the air/fuel charge.

Whether a spacer actually will benefit any particular combination is kind of a crapshoot. There's a nearly endless amount of potential intake manifold, camshaft, carburetor, cylinder head, exhaust headers, engine bore and stroke relationships, and spacer configurations and heights, so no one really knows "for sure" whether any given spacer will help or hurt a specific overall package. As Wilson Manifolds' Keith Wilson puts it, "An intake is like a camshaft—they're both infinitely adjustable."

A given spacer may help the top of the curve at the expense of the bottom of the curve. That may be good or bad depending on the end goal. Garnering a little more top-end at the expense of the bottom-end generally has little downside at the drags (assuming no throttle-stop) or in land-speed racing, not so much for other venues or on the street.

Addressing plenum volume specifically, Westech Performance's Steve Brul says the broad rule of thumb is that adding plenum volume helps the top-end and hurts the bottom-end—at least, at full-throttle. Yet as Wilson points out, a spacer may not show anything on the dyno at full throttle, but in the real world it still could improve part-throttle response and/or the transition from part to full throttle—which can be important on a dual-purpose street car or in closed-course racing (ovals, road courses, slaloms, or rallying). Unfortunately, most dynos are capable of only full-throttle testing. Also note that truly evaluating a spacer's efficacy may call for additional carb tuning because adding more plenum volume changes the metering signal at the carburetor.

Hood clearance permitting, for a race car, a taller spacer is usually better than a shorter spacer. "It's a time and volume issue," Wilson explains. "The further the carburetor boosters are from the intake valve, the more that air/fuel droplet has time to vaporize; the more time the air has to get chilled." Two-inch-tall spacers are generally a good baseline height choice on race cars; for street cars that operate at lower rpm and usually have hood clearance problems, 1- to 1-inch-tall spacers are more realistic, especially on a typical dual-plane intake, where a tapered-style spacer has proved particularly effective in some instances.

That said, here are some broad rules of thumb about what some common spacer types may accomplish:

  • Four-hole spacer: Four-hole spacers "generally" help the bottom-end by adding air speed and straightening out the air/fuel stream coming out of the carburetor. They may enhance fuel vaporization time by moving the boosters further away from the manifold runners. But they still have sharp edges on the bottom, which tends to separate the fuel out of the air, and may even cause reversion.

  • Open spacer: Open spacers sometimes add a little more top-end power, but usually trade-off lower rpm performance to do so. Dual-plane intakes tend to be less sensitive to the sometimes detrimental power/torque trade-off compared to a single-plane; we've often seen a few more top-end horses with a performance dual-plane and 1-inch open spacer without serious low-rpm losses. But (as noted above) a lot of this depends on the total combo, especially the camshaft. If the engine is at its airflow limit, then a bigger spacer may degrade engine performance. However, assuming the goal is more top-end power, by adding more plenum volume an open spacer may be beneficial if the overall engine package is not already at its airflow limit, or if class rules restrict carburetor size, cylinder-head mods, or camshaft configuration to the point the engine is starved for airflow.

  • Tapered spacer: A Wilson Manifolds specialty, these spacers are a two- or four-hole configuration on top, tapering into a semi-open but tapered configuration on the bottom side. They are said to combine the best attributes of open and closed spacers to enhance both part-throttle and full-throttle performance. With a tiny 390-cfm carb and/or a restrictor plate typical in NASCAR-type racing, through-carb velocity got so fast the air/fuel charge striking the plenum floor became a real problem. Here the tapered spacer really comes into its own. By tapering out from the bores into a larger-volume area at the bottom, it slows the velocity down so the air/fuel charge could turn the corner into the intake manifold runners. In fact, they worked so well NASCAR banned them. But tapers work with big carbs, too. According to Wilson, in one test its 2-inch Holley 4500 Dominator tapered spacer increased wide-open-throttle airflow through the carburetor by 130 cfm.

Of course, EFI throttle-bodies are different than carburetors because they don't need a "signal" to get the air/fuel charge moving. And in a port EFI system, the intake is dry; there's no fuel through the throttle-body or intake runners to fall out of suspension. But there's still the issue of total system volume versus engine airflow requirements, so in that sense spacers could still prove to be of benefit on EFI setups, although less so than in a traditional carbureted application.

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Sours: https://www.motortrend.com/how-to/pit-stop-carburetor-spacers-affect-performance/
carburetor too hot fix

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