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Edelbrock 1803 Dual Quad 4 Barrel Carburetor, 500 CFM, Electric Choke

Specs
Material Type:
Aluminum
Color:
Silver
Sold in Quantity:
Each
Finish:
Natural
Gasket(s) Included:
Yes
CFM:
500
Choke Type:
Electric
Fuel Type:
Gasoline
MFG. Part #:
1803
Carburetor Barrels:
4
Secondary Type:
Air Valve
Fuel Inlet Type:
Single
Edelbrock 1803 Dual Quad 4 Barrel Carburetor, 500 CFM, Electric ChokeEdelbrock 1803 Dual Quad 4 Barrel Carburetor, 500 CFM, Electric Choke
Edelbrock 1803 Dual Quad 4 Barrel Carburetor, 500 CFM, Electric Choke

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

The Thunder Series' unique Qwik-Tune Secondary Air Valve allows for limitless calibration of the secondary circuit with simple hand tools while on your vehicle.This four barrel carb can be easily adjusted - in seconds - to suit your application...no extra parts required to achieve optimum performance.

Designed and calibrated for dual-quad applications such as the RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram.

  • Primary and secondary booster clusters offer the most accurate and up-to-date calibration available for today's fuels and octane levels
  • Edelbrock carburetors bolt on and run right out of the box
  • Float levels are factory set; adjustments are rarely needed
  • Change jets, adjust floats & replace needles/seats without draining fuel or removing carb
  • Two-piece design means no gaskets below the fuel level for leak-free operation
  • Includes both timed and full vacuum ports for ignition advance
  • Dual inlets

Edelbrock 500 CFM 4 Barrel Carburetor Installation Instructions (PDF)

 Top It Off Rebate (PDF)

Notes

  • Metering Jets - Primary .086, Secondary .077
  • Metering Rods - .065 x .057
  • Step-Up Spring - orange (5" Hg)

You may also be interested in:

Edelbrock 7094 Dual Quad Carburetor Linkage
(Part #3257094)
                        

Designed for use with Edelbrock Dual-Quad manifolds and Performer Series carburetors. This linkage kit provides smooth, progressive throttle activation using high-quality aluminum, stainless steel and brass parts with spherical rod ends.

Fits our dual-quad manifolds (with Edelbrock Performer Series carburetors):

  • 325-5420 B/B Chevy Oval Port (Edelbrock #5420)
  • 325-5425 S/B Chevy (Edelbrock #5425) 
  • 325-5408 Chevy W-Series Small Port (Edelbrock #5408)
  • 325-5409 Chevy W-Series Large Port (Edelbrock #5409)
  • 325-7535 Ford 289-302 (Edelbrock #7535)
  • 325-7585 Ford 351W (Edelbrock #7585)
325-7094 Instructions (PDF)
Dual Quad Fuel Line for Edelbrock Carbs
(Part #91011578)
                        

This fuel line is intended to connect two Edelbrock (or Carter) four-barrel carbs on a low-rise 2x4 intake. The inlet fitting thread is 3/8" NPT female, and there is a 1/8" NPT hole that can be used for a fuel pressure gauge. The outlets on this adjustable fuel log can be as close together as 6-1/2" and can extend as far apart as 8-7/8". All of this carburetor fuel line is anodized blue, except for the central piece of braided stainless steel hose.

Lokar TCB-40DQ Throttle & Kickdown Cable Bracket for Edelbrock Carbs
(Part #491104)
                        This slick billet aluminum bracket mounts at the back of your Edelbrock carb and makes throttle cable, return spring and kickdown cable mounting easy. Includes zinc coated allen head bolts measuring 1-1/2" in length.
  • CNC machined from 6061-T6 billet aluminum for strength and style
  • Bracket designed to fit single or dual quad carbs
  • Easy installation of Lokar Throttle Cable and Kickdown kits
  • Dual Stainless Steel Return Springs
  • All hardware and detailed mounting instructions included
  • Recommended by Edelbrock
  • Attaches to both rear and carb bolts to eliminate bracket movement
  • Bracket utilizes either bolt pattern offered on Edelbrock carbs & manifolds
Edelbrock 1804 Dual Quad 4 Barrel Carburetor, 500 CFM, Manual Choke
(Part #3251804)
                        

The Thunder Series' unique Qwik-Tune Secondary Air Valve allows for limitless calibration of the secondary circuit with simple hand tools while on your vehicle. This four barrel carb can be easily adjusted - in seconds - to suit your application...no extra parts required to achieve optimum performance.

Designed and calibrated for dual-quad applications such as the RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram.

  • Primary and secondary booster clusters offer the most accurate and up-to-date calibration available for today's fuels and octane levels
  • Edelbrock carburetors bolt on and run right out of the box
  • Float levels are factory set; adjustments are rarely needed
  • Change jets, adjust floats & replace needles/seats without draining fuel or removing carb
  • Two-piece design means no gaskets below the fuel level for leak-free operation
  • Includes both timed and full vacuum ports for ignition advance
  • Dual inlets

Edelbrock 500 CFM 4 Barrel Carburetor Installation Instructions (PDF)

Top It Off Rebate (PDF)

 

Edelbrock 8091 Dual-Quad Carburetor Fuel Line
(Part #3258091)
                        

This fuel log supplies fuel to two Edelbrock carbs when used on Edelbrock dual-quad intake manifolds.

  • Adjustable 6-7/16" to 9" center-to-center
  • 1/8" NPT fuel pressure port
  • 3/8" NPT fuel inlet
Edelbrock 18044 Endurashine Dual Quad 500 CFM 4 Barrel Carb-Man. Choke
(Part #32518044)
                        

The Thunder Series' unique Qwik-Tune Secondary Air Valve allows for limitless calibration of the secondary circuit with simple hand tools while on your vehicle. It can be easily adjusted - in seconds - to suit your application...no extra parts required to achieve optimum performance. This four barrel carb also features Edelbrocks's amazing Endurashine finish that has the brilliance of chrome or a well-polished piece, but without the maintenance or the high price tag. This coating won't fade or oxidize and cleans up easily with soap and water.

Designed and calibrated for dual-quad applications such as the RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram.

  • Primary and secondary booster clusters offer the most accurate and up-to-date calibration available for today's fuels and octane levels
  • Float levels are factory set; adjustments are rarely needed
  • Change jets, adjust floats & replace needles/seats without draining fuel or removing carb
  • Two-piece design means no gaskets below the fuel level for leak-free operation
  • Includes both timed and full vacuum ports for ignition advance
  • Dual inlets

Edelbrock Dual Quad 4 Barrel Carb Installation Instructions (PDF)

Top It Off Rebate (PDF) 

Edelbrock 18034 Endurashine Dual Quad 500 CFM 4 Barrel Carb, Electric
(Part #32518034)
                        

The Thunder Series' unique Qwik-Tune Secondary Air Valve allows for limitless calibration of the secondary circuit with simple hand tools while on your vehicle. This four barrel carb can be easily adjusted - in seconds - to suit your application...no extra parts required to achieve optimum performance. Also features Edelbrocks's amazing Endurashine finish that has the brilliance of chrome or a well-polished piece, but without the maintenance or the high price tag. This coating won't fade or oxidize and cleans up easily with soap and water.

Designed and calibrated for dual-quad applications such as the RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram.

  • Primary and secondary booster clusters offer the most accurate and up-to-date calibration available for today's fuels and octane levels
  • Change jets, adjust floats & replace needles/seats without draining fuel or removing carb
  • Two-piece design means no gaskets below the fuel level for leak-free operation
  • Includes both timed and full vacuum ports for ignition advance
  • Dual inlets

Edelbrock 500 CFM 4 Barrel Carburetor Installation Instructions (PDF)

Top It Off Rebate (PDF) 

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  • Bracket designed to fit single or dual quad carbs
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The inspiration for "Orbit" came from the the '30's - '40's Ford horn button design. But repeating rings were a very popular design theme by a number of auto builders. Got twin 4's with real tight spacing? The selection of air cleaners for you has been pretty slim, right? Many manifolds out there position the carbs with only 6-7/16" center to center. This variation features a 1/4" offset base to deal with this problem - a simple solution to an old issue. If spacing this tight isn't your problem, we have a straight base also. If running twin carbs, check your center to center spacing. We use our Platinum Series air filter with A-356 aircraft grade castings for a show quality product. The filter media is a medium gray, washable oiled cloth. Prefer to have an unpolished finish? You can have that too. Hardware furnished includes a polished stainless socket drive top screw. Diameter 6-3/4" - Height 4-1/2". Fits carbs with the typical 5" base.
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(Part #2474471)
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This RPM Dual-Quad Manifold and Carb Kit from Edelbrock is just what you need for your 1957-1986 Small Block Chevy. These offer the ultimate setup for anyone that wants the look and the performance of dual-quad carbs. These kits include a high-tech throttle linkage, Russel fuel inlet and high quality intake gaskets from Edelbrock for a simple installation. This manifold and carbs come in a standard satin finish.

  • 1957-1986 Small Block Chevy
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  • Sold as Kit

Kit includes:

  • Intake Manifold (7525)
  • Electric Carburetor (3251803)
  • Manual Carburetor (3251804)
  • Throttle Linkage (3257094)
  • Fuel Line (3258091)
  • Intake Gaskets (7201)
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Multiple Carburetor Tech Tip (Link)
Edelbrock 2026 RPM Dual-Quad Manifold Carb Kit for Small Block Chevy
(Part #3252026)
                        

This RPM Dual-Quad Manifold and Carb Kit from Edelbrock is just what you need for your Small-Block Chevy with 1996 & later Vortec L31 or E-Tec heads. These offer the ultimate setup for anyone that wants the look and the performance of dual-quad carbs. These kits include a high-tech throttle linkage, Russel fuel inlet and high quality intake gaskets from Edelbrock for a simple installation. This manifold and carbs come in a standard satin finish.

  • Small-Block Chevy with 1996 & later Vortec L31 or E-Tec heads
  • High-tech throttle linkage
  • Satin Finish
  • Sold as Kit

Kit includes:

  • Intake Manifold (3257526)
  • Electric Carburetor (3251803)
  • Manual Carburetor (3251804)
  • Throttle Linkage (3257094)
  • Fuel Line (3258091)
  • Intake Gaskets (7235)
  • Intake Bolt Kit (8516)
  • Carburetor Stud Kit (8008)
Multiple Carburetor Tech Tip (Link)
Edelbrock 2035 RPM Dual-Quad Manifold Carb Kit for 289-302 Ford
(Part #3252035)
                        

This RPM Dual-Quad Manifold and Carb Kit from Edelbrock is just what you need for your 289-302 Ford. These offer the ultimate setup for anyone that wants the look and the performance of dual-quad carbs. These kits include a high-tech throttle linkage, Russel fuel inlet and high quality intake gaskets from Edelbrock for a simple installation. This manifold and carbs come in a standard satin finish.

  • For 289-302 Ford
  • High-tech throttle linkage
  • Satin Finish
  • Sold as Kit

Kit includes:

  • Intake Manifold (3257535)
  • Electric Carburetor (3251803)
  • Manual Carburetor (3251804)
  • Throttle Linkage (3257094)
  • Fuel Line (3258091)
  • Intake Gaskets (7220)
  • Intake Bolt Kit (8524)
  • Carburetor Stud Kit (8008)
Multiple Carburetor Tech Tip (Link)
Edelbrock 2085 RPM Dual-Quad Manifold Carb Kit for 351W Ford
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This RPM Dual-Quad Manifold and Carb Kit from Edelbrock is just what you need for your 351W Ford. These offer the ultimate setup for anyone that wants the look and the performance of dual-quad carbs. These kits include a high-tech throttle linkage, Russel fuel inlet and high quality intake gaskets from Edelbrock for a simple installation. This manifold and carb kit comes in a standard satin finish.

  • For 351W Ford
  • High-tech throttle linkage
  • Satin Finish
  • Sold as Kit

Kit includes:

  • Intake Manifold (3257585)
  • Electric Carburetor (3251803)
  • Manual Carburetor (3251804)
  • Throttle Linkage (3257094)
  • Fuel Line (3258091)
  • Intake Gaskets (7220)
  • Intake Bolt Kit (8584)
  • Carburetor Stud Kit (8008)
Multiple Carburetor Tech Tip (Link)
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You may want to order a 325-1477 rebuild kit also.