Services for Weber 40IDA3C & 46IDA3C Carburetors

Scheduling notice:

Please review Notice regarding scheduling of new projects.

$2725 Re-Manufacturing Service for one pair of complete carburetors

A completed set of Re-Manufactured 40IDA3C Weber carburetors.  Note that although clean, the bodies have not been restored.

A completed set of Re-Manufactured 40IDA3C Weber carburetors.  Note that although clean, the bodies have not been restored.

Our remanufacturing service provides reconditioning services not offered by any other service provider; we install six journal bearings per Throttle Housing, resize each throttle bore by 0.005" and complete the refurbishment by installing new, hand-fitted throttle valves.  The re-boring results in perfect bore and throttle valve fitment and the six journal bearings provide optimum fit and support of your throttle shafts.  After 40 years of service life the Throttle Housings display bore distortion and the OEM journal bearings have wear related clearances with the throttle shafts that are not optimum for normal operation.  This exclusive service provided only by Performance Oriented rectifies these issues and underscores our commitment to exceptional service standards.

After performing these mechanical refurbishment services the Throttle Housings are bench tested for throttle valve flow parity at idling position prior to reassembly.  The following is a partial list of items addressed by the Throttle Housing service:

  • Throttle Housings completely disassembled (excluding removal of studs)
  • Six journal bearings are installed into each throttle housing using oil-impregnated bronze bushings
  • Throttle bores machined to remove age and wear related distortions
  • New hand-fitted throttle valves machined to match the 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 bench tested for throttle valve flow parity at idling position
    • Idle Air Correction Screws adjusted
    • Throttle Lever Stop Screws adjusted

Continuing from the Re-Manufacturing of the Throttle Housings a comprehensive refurbishment of all components of the carburetors is performed followed with rebuilding.  After rebuilding they are test run and adjusted for idling performance on our dedicated test engine.  The Re-Manufacturing service returns your Webers "ready to run" and equal in function to new Webers.  The following is a continuation list of items addressed by the Re-Manufacturing service which is in addition to those tasks performed for the Throttle Housing 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 with fuel inlet banjo fittings and banjo bolts
  • 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 @ $110 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.

 

$3475 Restoration Service for one pair of complete carburetors

A completed set of Restored 40IDTP13C Weber carburetors for a 1970 914/6. 

A completed set of Restored 40IDTP13C Weber carburetors for a 1970 914/6. 

The Restoration service adds continues from the Re-Manufacturing 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 Re-Manufacturing 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 @ $110 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.

 

Restoration of OEM intake manifolds @ $350

Restored intake manifolds

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

NOTE:  Add $100 if supplied manifolds are painted or powder coated.

 

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 @ $85
  • Nickel plated air horns @ $195

 

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.