Services for Weber 40IDA3C & 46IDA3C Carburetors

Level 1 - $1375 for one pair of carburetor Throttle Housings

Our baseline remanufacturing service installs new throttle valves into resized throttle bores and installs six new journal bearings into each throttle housing. The housings are flow tested and are returned ready for the customer to reassemble and run.  The following is a partial list of items addressed by the Level 1 service:

• Throttle Housings completely disassembled (excluding removal of studs)
• All six journal bearings in each housing replaced using oil-impregnated bronze bushings (other service providers only replace the outer two bearings, some using Teflon bearings)
• Throttle bores machined to correct for wear and distortions from aging
• New throttle valves machined to match the resized throttle bores
• Adjust end-float of both throttle shafts in each throttle housing
• Supplementary machine work includes:
  • Bottom surfaces re-machined for flatness
  • Main jet holder and fuel drain bolt interfaces are resurfaced
• Idle circuit fuel galleries opened, cleaned and re-plugged
• Threaded ports refreshed by re-tapping
  • Idle mixture screws
  • Idle air correction screws
  • Main jet bungs
• Throttle Housings are ultrasonically cleaned
• OEM finishes are restored on throttle shaft components and adjusting screws
• OEM style, riveted 8mm ball studs installed on throttle lever arms
• Throttle Housings are flow checked to assure quality of throttle plate fitment
  • Idle Air Correction Screws adjusted
  • Throttle Lever Stop Screws adjusted

Notes:

• Customer to supply:
  • Carburetor Throttle Housings including:
    • Three idle air correction screws per Throttle Housing
    • One Throttle Lever Stop Screw and Spring per Throttle Housing
• Customer to retain:
  • Top covers of Throttle Housings
  • All brass and steel components
  • Air cleaners and associated components
  • Intake manifolds
  • Throttle linkages
• Please review Standard Shipping Guidelines provided on the SHIPPING web page
• Customer is responsible for assembly of carburetors and performing final adjustments to tailor the tuning of their carburetors to their engine.
• We strongly recommend upgrading throttle bodies using the early style shaft couplings to the later style, cylindrical couplings @ $150 for two throttle bodies.  Reuse of the earlier style couplings may result in rotational slippage between the throttle plates: Performance Oriented does not provide warranty repair for this issue.
• Please visit Standard Service Options below for additional carburetor services offered by Performance Oriented.
• It is assumed the supplied Throttle Housings are serviceable units removed from a running engine. Units with missing components, seized throttle shafts, broken jet holders or that are corroded and/or dirty will incur additional costs to return them to service.

Level 2 - $2175 for one pair of complete carburetors

Level 2 continues from the Level 1 Throttle Housing service by performing a comprehensive refurbishment of all components of the carburetors and then by rebuilding them.  After rebuilding they are test run and adjusted for idling performance on our dedicated test engine.  The Level 2 service returns your Webers "ready to run" and equal in function to new Webers.  The following is a partial list of items addressed by the Level 2 service:

• Carburetors completely disassembled (excluding removal of studs)
• Sealing surfaces refreshed by machining:
  • Banjo interfaces on Top Covers
  • Float well cap interfaces on Top Covers
• Throttle Housings and top covers are ultrasonically cleaned
• All steel components de-burred and factory finishes restored
• Brass parts refurbished and polished
• Air vent pipes in top covers removed, re-plated and reinstalled
• Top covers modified to control float bowl percolation
• Inspection of all components for sizing, distortion and physical defects
• Blueprinted components include:
  • Fuel floats
  • Accelerator pump bodies
  • Accelerator pump inlet check valves
• Reassembly using new gaskets and new hardware including:
  • External throttle return springs
  • Accelerator pump levers (installed on throttle shafts)
  • Adjustable Accelerator Pump Rods
  • Tall, OEM style, nylock hex nuts for throttle bodies and air horns
  • Fuel inlet needle valves
  • Intake manifold and air cleaner gaskets
• On-engine tuning including adjustments of:
  • Idle air correction screws
  • Idle mixture screws
  • Throttle stop screws
  • Fuel float needle valves shimmed
  • All fuel interfaces checked for leakage
  • Accelerator pumps adjusted for output

Notes:

• Customer to supply:
  • Complete carburetors without air horns or fuel inlet fittings
• Customer to retain:
  • Air cleaners and associated components
  • Inlet fuel banjo fittings and banjo bolts
  • Intake air horns
  • Intake manifolds
  • Throttle linkages
• Please review Standard Shipping Guidelines provided on the SHIPPING web page.
• Customer is responsible for performing final adjustments to tailor the tuning of their carburetors to their engine.
• We strongly recommend upgrading throttle bodies using the early style shaft couplings to the later style, cylindrical couplings @ $150 for two throttle bodies.  Reuse of the earlier style couplings may result in rotational slippage between the throttle plates: Performance Oriented does not provide warranty repair for this issue.
• Please visit Standard Service Options below for additional carburetor services offered by Performance Oriented.
• It is assumed the supplied carburetors are serviceable units removed from a running engine. Units with missing components, seized throttle shafts, broken jet holders or that are corroded and/or dirty may result in adders in the cost estimate in order to return them to service.

Level 3 - $2725 for one pair of complete carburetors

The Level 3 service adds restoration to the Level 2 service resulting in completely restored carburetors both mechanically and cosmetically. All components are removed, inspected and replaced or restored. The following are additions to the Level 2 remanufacturing service above:

• Carburetors are completely disassembled including removal of all lead plugs and studs
• Tops and bottoms of Throttle Housings and top covers machined for flatness and sealing efficiency
• All machined surfaces are de-burred prior to application of finishes
• All threaded ports refreshed by re-tapping
• All fuel delivery galleries are opened, reamed to refresh the passageways and re-plugged
• Period correct, OEM finishes restored on all components

Notes:

• Customer to supply:
  • Complete carburetors including fuel inlet banjo fittings
• Customer to retain:
  • Air cleaners and associated components
  • Intake air horns
  • Intake manifolds
  • Throttle linkages
• Please review Standard Shipping Guidelines provided on the SHIPPING web page.
• Customer is responsible for performing final adjustments to tailor the tuning of their carburetors to their engine.
• We strongly recommend upgrading throttle bodies using the early style shaft couplings to the later style, cylindrical couplings @ $150 for two throttle bodies.  Reuse of the earlier style couplings may result in rotational slippage between the throttle plates: Performance Oriented does not provide warranty repair for this issue.
• Please visit Standard Service Options below for additional carburetor services offered by Performance Oriented.
• It is assumed the supplied carburetors are serviceable units removed from a running engine. Units with missing components, seized throttle shafts, broken jet holders or that are corroded and/or dirty may result in adders in the cost estimate in order to return them to service.

Standard Service Options

The following are optional standard services available for Weber carburetor projects.  Please visit Weber Performance for additional service options.

Remanufacture throttle linkage set @ $175

This service completely restores and blueprints your throttle linkage set and includes all linkages and mounting plates from the bell crank mounted to the intake manifold at cylinder #3 to the drop links at your Webers.  Typically: the adjustable links are bent, have damaged threads and the 8mm ball sockets are worn out; the throttle cross bar is distorted, the 8mm ball studs are worn and will have cracks in the brazed joints; the bell crank mounted at cylinder #3 has worn 8mm ball studs and has bearings are shot and the mounting brackets that attach to the intake manifolds are bent.  This service corrects all of these issues, restores the OEM finishes, installs new 8mm ball studs as needed, provides new 8mm ball sockets (Qty = 7), provides new bearings for both bell cranks and straightens the mounting plates. 

Item service details:

• Throttle cross bar
  • Straightened and blueprinted for geometry
  • 8mm ball studs measured for wear and replaced as necessary
  • Brazed joints checked for cracking and repaired as necessary
  • De-burred and refinished per OEM specifications
• Side mounting plates
  • Straightened and checked for cracks/distortion and repaired as necessary
  • 13mm ball studs checked for wear/damage (replacement is cost adder)
  • De-burred and refinished per OEM specifications
• Adjustable link rods
  • Checked for correct type for application
  • Straightened, de-burred and refinished per OEM specifications
  • New 8mm ball sockets and locking nuts supplied (Qty = 7)
  • Serviced items include:
    • Two drop links from throttle cross bar to throttle lever arms on carburetors
    • One long link from bell crank @ cylinder #3 to throttle cross bar
• Bell crank mounted to 8mm shaft on intake manifold at cylinder #3
  • Straightened and checked for cracks/distortion and repaired as necessary
  • 8mm ball studs measured for wear and replaced as necessary
  • De-burred and refinished per OEM specifications
  • New, sintered bronze bearings installed
• Bell crank mounted on transmission side cover
  • Straightened and checked for cracks/distortion and repaired as necessary
  • 8mm ball studs measured for wear and replaced as necessary
  • De-burred and refinished per OEM specifications
  • New, sintered bronze bearings installed

Restoration of OEM intake manifolds @ $325

The OEM intake manifolds are made of die cast magnesium (except for the very earliest version which were sand cast of magnesium) and were delivered without a protective coating until 1970 when they were painted with a very tough polyurethane finish.  Magnesium is particularly reactive to the combustion gasses in the intake tract resulting in pitting due to corrosion.  In addition to corrosion issues these manifolds are routinely distorted due to the pressure applied to their flanges during torquing of installation fasteners.

Performance Oriented corrects these issues during the refinishing process, which includes:

• Removal of all studs and bell crank mounting shaft
• Top and bottom surfaces fly-cut to re-establish flat interfaces
• Interior walls smoothed of pitting defects due to corrosion
• Exterior finish blasted clean and black (or grey as requested) magnesium chromate finish applied
• Exterior surfaces coated with protective, oil-based penetrant and corrosion inhibitor
• Refinished studs and bell crank shaft re-installed
• Cost adder for black polyurethane finish over black magnesium chromate: $95

Level 1 Supplemental Service Package @ $375

The Level 1 service excludes refurbishment of most of the components of the carburetor.  The "Supplemental Service Package" helps bridge the gap between a Level 1 service and a Level 2 service by providing refurbishment of all mechanical components used in the carburetor to facilitate the assembly, tuning and function of your Webers.  All carburetor components addressed per the Level 2 service are cleaned, inspected, blueprinted and refinished leaving carburetor assembly requiring only a rebuild kit for completion. 

Refinish intake air horns

The intake air horns varied in type over the years of production of the Porsche 911 and 914/6 cars.  The earliest hours were spun from one piece of flat material and then finished with nickel plating.  Later horns were spun from a thinner material and were zinc plated with a yellow chromate finish.  Finally, beginning in 1968 injection-molded air horns were adopted for use and were either grey or black.

Performance Oriented offers restoration of the two types of metal horns:

• Zinc plated steel air horns @ $75
• Nickel plated air horns @ $175

Additional Services

Webers sometimes have issues such as: broken housings, seized jet holders, broken studs, blocked fuel galleries or stripped threads. Performance Oriented routinely repairs these problems so don't scrap your carbs without first checking with us. 

Click on the image below and scroll through some typical repairs.