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pulley Genuine Porsche part 91110202201

Code: 91110202201

Genuine Porsche part

pulley

The product code 91110202201 was also found on these diagrams

813-45 - pulley

Air conditioner, compressor driving mechanism mounting 911 1974-77

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

4 4 4 4

Crankshaft pully 127mm for EFI conversion. Porsche 911 1974 - 1989

93010202809

Product Information

Adapt Motorsport 127mm 36-1 Crank Pulley

Upgrade the crankshaft pulley on a classic air-cooled Porsche 911 with this precision-machined Adapt Motorsport 127mm crank pulley, available in separate A/C and non-A/C configurations.

Fits:

Porsche 911 / 911S 2.7Ltr - 1974 to 1978
Porsche 911 Carrera 3.0Ltr - 1976 to 1977
Porsche 911 SC - 1978 to 1983
Porsche 911 3.2 - Carrara 1984 to 1989 (without Air Conditioning Version)

Both versions incorporate a 36-1 toothed crank trigger arrangement, providing the accurate crankshaft position reference required when converting an air-cooled Porsche engine to modern programmable electronic fuel injection. Adapt Motorsport designed the trigger pattern primarily for use with a suitable Hall-effect crankshaft sensor.

The non-A/C 127mm pulley is suitable for Porsche 911 2.7, 3.0 and 3.2 Carrera applications, while the A/C version incorporates an additional 90mm air-conditioning drive pulley.

Important: the A/C version is for early cars with the piston-style A/C compressor and is only suitable for cars up to 1983. It does not fit the 1984-onwards Porsche 911 Carrera 3.2 A/C system, which uses a larger-diameter A/C pulley. Adapt Motorsport specifically advises visually checking the pulley arrangement fitted to the engine before ordering.

What Does the Crank Pulley Do?

The crankshaft pulley is driven directly by the engine crankshaft and provides the belt drive required for associated engine accessories.

On these classic Porsche applications, the main pulley also provides a convenient location for an accurate crankshaft position trigger when converting the engine to modern electronic management.

The A/C version adds the secondary belt groove required to drive the appropriate early air-conditioning compressor.

Integrated 36-1 Crank Trigger

Both pulley versions incorporate a 36-1 trigger pattern.

A 36-1 trigger has 36 possible tooth positions with one tooth deliberately omitted. As the crankshaft rotates, a suitable position sensor reads the passing teeth and identifies the missing-tooth reference.

This provides a compatible programmable ECU with an accurate indication of crankshaft position and engine speed.

The result is a much more suitable crankshaft reference for a modern EFI system than relying solely on the original distributor-based arrangement.

Designed for Hall-Effect Sensors

Adapt Motorsport states that the 36-1 trigger arrangement is best suited to Hall-effect sensors.

A compatible crank sensor and correctly positioned sensor bracket are required to read the trigger wheel.

Adapt Motorsport offers a matching crank trigger sensor kit for this purpose.

Suitable for Sequential EFI Conversions

A crankshaft trigger provides the ECU with accurate crank position and engine-speed information, but fully sequential engine management also needs to establish which engine cycle each cylinder is on.

Adapt Motorsport therefore recommends combining the crank pulley with its matching distributor-drive reference and crank trigger sensor kit when building a sequential EFI system.

With the appropriate ECU, sensors and calibration, this can provide the positional information required for modern sequential fuel injection and ignition strategies.

Precision-Machined 7075 Aluminium

The A/C pulley is precision machined from 7075 aluminium and finished in black anodising.

7075 is a high-strength aluminium alloy commonly selected where a combination of strength and relatively low component weight is required.

Replacing an original steel pulley with a machined aluminium component can also reduce pulley mass, although the primary purpose of these Adapt Motorsport pulleys is to provide a replacement pulley with an integrated 36-1 EFI trigger system.

Campagnolo-Inspired Design

The non-A/C version has been styled after the distinctive appearance of the famous Campagnolo rally wheel.

This gives the pulley a period motorsport-inspired appearance that complements classic 911 restomod, rally-inspired and competition engine builds while incorporating the modern 36-1 crank trigger.

Why Upgrade to a Trigger Pulley?

A crank trigger pulley becomes particularly useful when the engine is being converted from its original management system to a modern programmable ECU.

Typical reasons for installing one include:

Programmable EFI conversion
Sequential fuel injection
Modern programmable ignition
Distributor-delete conversion
Coil-on-plug conversion
Engine rebuild with modern management
Restomod engine build
Motorsport engine preparation
More accurate crankshaft position sensing
Replacement of the original steel crank pulley

The pulley itself does not increase engine power. Its main advantage is providing the mechanical drive function together with a precise crankshaft reference for compatible electronic engine management.

Porsche Carrera 3.2 Applications

For a Porsche 911 Carrera 3.2, the distinction is straightforward.

If the engine does not require an A/C pulley, the 127mm non-A/C version is the appropriate version covered by this listing. Adapt Motorsport lists its non-A/C pulley for 2.7, 3.0 and 3.2 engines.

If the Carrera 3.2 retains its original-style air-conditioning system, do not use the 127/90mm early A/C version. The 1984-onwards 3.2 Carrera requires the later larger-diameter A/C pulley arrangement.

Checks Before Ordering

Classic Porsche 911 engines frequently undergo modifications, engine swaps and air-conditioning upgrades, so model year alone should not be the only check.

Before ordering, confirm:

Engine type
Existing crank pulley diameter
Whether air conditioning is fitted
A/C compressor type
Existing A/C pulley diameter
Belt arrangement
Crank sensor configuration
ECU compatibility with a 36-1 trigger
Sensor mounting arrangement

For an A/C-equipped car, visually checking the existing pulley and compressor arrangement is particularly important, as recommended by Adapt Motorsport.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93010202809

93010202808

93010202804

93010202801

91110201750

91110201704

The product you are viewing cross references to these numbers

6 6 6 6 6 6

Crankshaft pulley titanium 131mm. Porsche 911 1974-77

91110201704/1

Product Information

Crankshaft pulley titanium 131mm.
Fits:
Porsche 911 / 911S / Carrera 3.0ltr - 1974 to 1977

Titanium is an Aerospace Material That Has the Highest Strength to Weight Ratio of any Structural Metal.
It has Been Used by Porsche Racing for Decades in Applications Where High Strength combined with the Lowest Weight is Required.
PMO Parts has Chosen to Produce a Limited Run of Motorsports Inspired Stock Configuration V-belt Crankshaft Pulleys for Your Engine Honoring This Rich Heritage.

Featuring:

3D Scanned & CAD Designed Using Genuine Sample Steel Parts
CNC Machined in Aerospace Grade Titanium Ensuring High Strength and Precision
Timing Marks @ Z1, 5⁰, 30⁰, 35⁰ BTDC

FE Marking is Suitable for MFI Pump Timing Applications, 120⁰ ( Z2 & Z3 ) Valve Timing Adjustment Marks also Included

Porsche Motorsports Hole Pattern Mimics Original Racing Parts
Reduces Rotating Mass and Engine Weight
Includes Proprietary Titanium Mounting Bolt Featuring Thread Locking Compound
Torque to 56 ft lbs (dry)

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91110201704

91110201704

The product you are viewing cross references to these numbers

7 7 7 7 7 7 7

Ignition Ref/Sync Sensor Kit, 127/90mm Pulley with Air Conditioning. Porsche 911 1974-83

AMS9050053KIT.1

Product Information

Adapt Motorsport Sync 2 ignition reference and synchronisation sensor kit for early Porsche 911 2.7 and 3.0 engines equipped with a piston-style air-conditioning compressor. It combines a dual-sensor module with a 127/90mm crankshaft pulley and 36-1 trigger disc.

Fits:

Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Porsche 911 1978-1983 3.0L / SC

Visually confirm the crankshaft pulley and air-conditioning compressor arrangement fitted to the engine. Check fitment for your specific vehicle, model, year and engine before ordering.

What This Product Does

The crank sensor monitors the teeth of the 36-1 trigger disc, enabling a compatible ECU to determine crankshaft speed and position from the pulse sequence and missing-tooth reference. The second Hall-effect sensor is housed in the distributor-location module and reads a single reference tooth at half engine speed.

This reference signal occurs once during each complete four-stroke cycle, allowing the ECU to identify whether the engine is on its compression or exhaust stroke. Combining both signals supplies the position data required for sequential fuel injection and ECU-managed ignition.

Functions

Measures crankshaft position and rotational speed
Provides one engine-cycle synchronisation pulse per 720 degrees
Enables sequential injection and ignition strategies with a suitable ECU
Installs in the original distributor mounting position
Provides digital Hall-effect sensor outputs

Technical Details

Sync 2 module with two ZF digital Hall-effect sensors
127/90mm air-conditioning crankshaft pulley for parallel-end crankshafts
36-1 crank trigger disc
Recommended sensor supply voltage: 8V
Supported sensor operating supply: 5–12V
Machined aluminium housing with an anodised finish, maintenance-free bronze bush and sealed roller bearing

Kit Contents

Main dual-sensor body assembly
Two ZF Hall-effect sensors
127/90mm crankshaft pulley and trigger disc
Wiring, terminals and connectors for connection to the engine wiring loom

Installation Requirements

The assembly occupies the original distributor location and uses the factory distributor gear removed from the existing unit. Installation involves connecting the sensors to a compatible engine control unit, setting the correct sensor gap at the crank trigger and configuring the reference position in the ECU software.

As the original distributor is removed, the engine requires coil-on-plug ignition or another per-cylinder coil and ignition-lead arrangement in which the ECU controls each ignition event.

Why Replacement Matters

Sequential engine management needs reliable information for engine speed, crank position and the current four-stroke cycle. This kit supplies both crank and cycle-reference signals without using the original distributor to route the ignition spark, supporting conversion to compatible electronic fuel-injection and ignition control.

Important Installation Notes

The 127/90mm pulley is intended for early piston-style air-conditioning compressor installations and is not the correct version for 1984 onwards 3.2 engines.
On magnesium 2.7 engine cases, a small boss near the crank pulley must be trimmed or die-ground to provide clearance for the trigger disc.
The system does not fit Porsche 964 or 993 3.6 engine cases; these require the separate 964/993 sensor solution.
Confirm ECU compatibility, sensor supply voltage, distributor gear suitability and available pulley clearance before installation.

FAQs

Does the kit generate both crank and cycle-reference signals?
Yes. One sensor reads the 36-1 crank trigger, while the second provides a synchronisation pulse once every two crankshaft revolutions.
Can the standard distributor ignition system remain in use?
No. The sensor module installs in the distributor position, so ignition must be controlled by the ECU using coil-on-plug or another individually controlled per-cylinder arrangement.
Is this pulley suitable for a 1984 onwards Carrera 3.2?
No. Later 3.2 installations use a larger air-conditioning pulley diameter and require the 127/133mm version.
Does installation on a 2.7 magnesium case require modification?
Yes. Adapt Motorsport specifies that a small crankcase boss must be reduced to create trigger-disc clearance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

AMS9050053KIT.1

93060250052

91110201550

91110202201

93010202301

93010202303

The product you are viewing cross references to these numbers

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pulley Genuine Porsche part 91110202201