Services for Weber 40IDA3C & 46IDA3C Carburetors

Performance Oriented reconditions Weber 40IDA3C carburetors to a quality surpassing that of any other service provider.  As a one man shop you are assured all tasks associated with your Weber service are personally attended to by Paul Abbott.

Please note the following are exclusive services provided by Performance Oriented underscoring our commitment to exceptional service standards:

  • Two throttle shaft bearings are typically replaced as the industry standard however, Performance Oriented replaces all six journal bearings in each throttle housing for all service offerings thereby ensuring optimum shaft support and minimizing uncontrolled air being drawn into the throttle bores during slow speed operation. 

  • Fuel galleries supplying the idle and progression circuit are opened and re-sized to remove internal corrosion, a typical problem in these carburetors.

  • Level 1: Throttle Housings Only - This service includes flow testing of the throttle valves for flow parity after assembly.

  • Level 2: Complete Carburetor Re-manufacturing - This service includes on-engine running and pre-adjustment to provide “plug and play” installation.

  • Level 3: Complete Carburetor Restoration – This service removes all components from the housings, re-machines all gasketed surfaces and restores finishes to all components to OEM configuration.

Service Offerings:

Level 1: Throttle Housings Only: $1775

The Level 1 service provides essential mechanical refurbishment of the throttle shaft bearings to rectify slow speed running issues.  This is our most economical service offering and is provided for those wanting to perform disassembly, assembly & tuning themselves.

Details of work performed

  • Re-manufactures one pair of carburetor housings returning them ready for reassembly

  • Complete disassembly of throttle housings & ultrasonic cleaning of all components

    • Housings cleaned by:

      • Dip tank soaking

      • Pressure washing

      • Ultrasonic cleaning

  • Six, high-capacity, steel-infused, self-lubricating, sintered-bronze, self-lubricating throttle shaft bearings installed per housing

  • Throttle bores honed

  • Six new, OEM diameter throttle valves installed

  • End-float of both throttle shafts in each throttle housing adjusted

  • Throttle housing bottom flanges are re-surfaced for flatness

  • OEM finishes are restored on throttle shaft components and adjusting screws

  • OEM style, riveted 8mm ball studs installed on throttle lever arms

  • “Hidden” fuel galleries supplying idle jets are opened, cleaned & re-plugged

  • New accelerator pump rods and lever arms (lever arms installed on throttle shafts) supplied as required

  • Throttle housings are bench tested for throttle valve flow parity at idling position

See photo to identify what items to send to Performance Oriented for Level 1 service

A pair of " Level 1: Throttle Housings Only " after service is completed.  Only those items shown in the image are to be sent for this service.  Note the restored finishes on the adjusting screws and levers.

A pair of "Level 1: Throttle Housings Only" after service is completed.

Only those items shown in the image are to be sent for this service.

Note the restored finishes on the adjusting screws and levers.

 

Level 2: Complete Carburetor Re-manufacturing: $3175

The "Level 2: Complete Carburetor Re-Manufacturing" service returns your carburetors "ready to run" and equal in function to new Webers.

Please note:

  • Jetting is assessed with regards to your engine particulars and for your driving application.  

  • If you are using IDTP Webers on a non-OEM specification engine then Performance Oriented will provide counsel regarding modifications to mitigate transition drive-ability issues.

Details of work performed

  • Re-manufactures one pair of carburetors returning them ready to run

  • Complete disassembly of carburetors & ultrasonic cleaning of all components

    • Housings cleaned by:

      • Dip tank soaking

      • Pressure washing

      • Ultrasonic cleaning

  • Six, high-capacity, steel-infused, self-lubricating, sintered-bronze throttle shaft bearings installed per housing

  • Throttle bores honed

  • Six new, OEM diameter throttle valves installed

  • End-float of both throttle shafts in each throttle housing adjusted

  • Throttle housing bottom flanges are re-surfaced for flatness

  • OEM finishes are restored on steel components and adjusting screws

  • OEM style, riveted 8mm ball studs installed on throttle lever arms

  • Brass components are de-burred, vapor-blasted and polished

  • Fuel floats are blue-printed for geometry and leak checked

  • Main venturis & auxiliary venturis vapor-blasted

  • Fuel galleries supplying idle jets are opened, cleaned & re-plugged

  • Vent pipes in top covers removed, re-plated and reinstalled

  • Top covers modified to control float bowl percolation

  • New accelerator pump rods and lever arms (lever arms installed on throttle shafts) supplied as required

  • Accelerator pump bodies & top covers

    • blueprinted for geometry

    • re-surfaced for flatness

    • vapor-blasted

  • Throttle housings are bench tested for throttle valve flow parity at idling position

  • Assembly hardware kit including new float needle valves

  • 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

See photo to identify what items to send to Performance Oriented for Level 2 service

 

A pair of " Level 2: Complete Carburetor Re-Manufacturing " after service is completed.  Only those items shown in the image are to be sent for this service.  Note the restored finishes on those items readily removable for servicing.  This set is from a 1969 911T.

A pair of "Level 2: Complete Carburetor Re-Manufacturing" after service is completed.

Only those items shown in the image are to be sent for this service.

Note the restored finishes on those items readily removable for servicing.

This set is from a 1969 911T.

Level 3: Complete Carburetor Restoration: $4375

The "Level 3: Complete Carburetor Restoration" service continues from "Level 2: Complete Carburetor Re-Manufacturing" service resulting in your Webers being restored both mechanically and cosmetically to OEM specifications.  All components are removed, inspected and replaced or restored.

  • Restores one pair of carburetors returning them ready to run; both mechanically and cosmetically equal to OEM specifications

  • Continues from the work performed by "Level 2: Complete Carburetor Re-Manufacturing" service

  • Details of additional work performed in addition to those provided by the Level 2 service

    • Bungs for main jet holders & float bowl drain bolts are refreshed by machining

    • Bungs for hex caps over float needle valves are refreshed by machining

    • Throttle bores machined 0.010" oversize to remove age and wear related distortions

    • New, hand-fitted throttle valves machined to match the throttle bores

    • 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 re-machined surfaces are de-burred prior to application of finishes

    • Throttle housings and top covers vapor-blasted

    • All threaded features refreshed by re-tapping

    • Machined surfaces of brass components re-machined to restore OEM texture

    • All fuel delivery galleries are opened, reamed to refresh the passageways and re-plugged

    • Period correct, OEM finishes restored on all components

      • Period correct, nickel plating used on accelerator pump linkages (1966 through 1968 year models)

See photo to identify what items to send to Performance Oriented for Level 3 service

A pair of " Level 3: Complete Carburetor Re-Manufacturing " after service is completed.  Only those items shown in the image are to be sent for this service.  Note the restored finishes on all items.  This set is from a 1968 911S.

A pair of "Level 3: Complete Carburetor Re-Manufacturing" after service is completed.

Only those items shown in the image are to be sent for this service.

Note the restored finishes on all items.

This set is from a 1968 911S.

General Notes:

  • Customer to supply:

    • Carburetors as depicted in the photos for each level of service.

  • Customer to retain:

    • Air cleaners and associated components

    • Intake air horns (unless restoration is requested)

    • Intake manifolds (unless restoration is requested)

    • Throttle linkages (unless restoration is requested)

  • Customer is responsible for performing final adjustments to tailor the tuning of their carburetors to their engine.

  • 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.

  • Packaging and Shipping:

    • Recommended packaging procedure:

      • Place each carburetor int its own box with appropriate packing material.

      • Tape these two boxes to be as one larger box.

      • Place this assembly of tow boxes into a larger box with appropriate packing material.

      • Have Performance Oriented sign for the shipment at time of delivery.

      • Performance Oriented prefers FedEx as the shipper.

      • Contact Performance Oriented prior to shipping to assure we are ready to receive it.

    • Address (This is a residential address.):

      Performance Oriented

      1040 Luradel Ave S

      Salem, Oregon 97302

      530.520.5816

      Attn: Paul Abbott

 

Standard Service Options

The following are optional standard services available for Weber carburetor projects. 

 

Restoration of OEM intake manifolds @ $425

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 machined to re-establish flat interfaces

  • Interior walls smoothed of pitting defects due to corrosion

  • Exterior finish blasted clean and black magnesium chromate finish applied

  • Exterior surfaces coated with protective, oil-based penetrant and corrosion inhibitor

  • Refinished studs and bell crank shaft re-installed

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

 

Refinish intake air horns (Pricing below)

The intake air horns varied in type over the years of production of the Porsche 911 and 914/6 cars.  The earliest horns 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

Restoration of throttle linkage Set @ $225

  • Throttle cross bar straightened/de-burred/blueprinted for geometry and new 8mm ball studs installed followed by finish restoration

  • Drop links and long link straightened/de-burred and threads "chased"; ball sockets de-burred and threads "chased" followed by finish restoration

  • Link from transmission to bell crank straightened/de-burred and threads "chased"; ball socket de-burred and threads "chased" followed by finish restoration

  • Bell cranks (both transmission and intake manifold bell cranks) straightened/de-burred and new 8mm ball studs installed followed by finish restoration and supplied with new bronze bearings

  • Side mounting brackets straightened/de-burred followed by finish restoration

 

Throttle Linkage Set after restoration.

Throttle Linkage Set after restoration.

 

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.