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bushing Genuine Porsche part 90110202501

Code: 90110202501

Genuine Porsche part

bushing

The product code 90110202501 was also found on these diagrams

102-00 - bush complete

crankshaft and connecting rods 911 1970-73

102-00 - bush

crankshaft 911 1978-83

102-00 - bush

Crankshaft 911 1974-77

102-00 - bush complete

crankshaft and connecting rods 911 1965-69

102-000 - bush (complete)

Crankshaft 914-6 1970-76

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.

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Lightened crankshaft for steel con rods. Porsche 911 2.0ltr / 2.2ltr

90110201101/1

Product Information

Lightened crankshaft for steel con rods.

oematch

Fits:
Porsche 911 2.0ltr - 1965 to 1969
Porsche 911 2.2ltr - 1970 to 1971

Notes
Conforms to FIA Appendix K
Tested to 10,000 RPM

Increasing the performance of an engine via the crankshaft does not make sense at first glance, but it is worth taking a closer look.

The mechanical efficiency of an engine, which, together with the thermodynamic efficiency and the volumetric efficiency, determines the rated output of an engine, depends fundamentally on the diameter of the crankshaft bearings and the friction in the bearings.

Of course, the diameter cannot be easily changed, but the friction can, which in turn depends on the bending loads and the resulting vibrations of the crankshaft. This is exactly why the use of top-quality titanium connecting rods is of little use if the resulting significantly reduced rotating masses at the connecting rod foot are not also taken into account on the counterweight side of the crankshaft.

Because only a perfectly designed crankshaft, calculated for the connecting rod weights, actually brings with it less bearing friction due to eliminated vibrations, and thus an increase in performance. Furthermore, this crankshaft is speed-resistant up to 11,000 rpm and tested in continuous operation up to 10,000 rpm. A pleasant side effect is of course a reduced load on the crankcase and less wear.

This crankshaft is designed utilising the latest calculation methods using CAD and FE methods (finite elements), but is still FIA legal for historic motorsport and conforms to Annex K, but is only designed for operation with steel connecting rods. The focus was on the FIA regulation that " in the case of a new production, the original or the newly manufactured component may be lightened, which was exactly the case with this crankshaft.

If you want to run this crankshaft with titanium connecting rods, use crankshaft part number 91610201600/1 which is designed for the lower rotating masses of titanium connecting rods. Failure to comply with the mass balance will sooner or later lead to the crankshaft breaking at maximum speeds.

Furthermore, this crankshaft is an authentic replacement for every standard crankshaft of the 911 from 1965 to 1971, i.e. every 2.0ltr and 2.2ltr engine.

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

90110201101

90110201100

The product you are viewing cross references to these numbers

Flywheel with starter ring gear Lightweight. Porsche 911 1965-68 / 914-6 70-76

90110202602/2

Product Information

Flywheel with starter ring gear, Lightweight. Porsche 911 1965-68 / 914-6 70-76
6 Bolt type 215mm

Fits:
Porsche 911 2.0L 1965-69 (not for 912)
Note: early 911's might need to change the starter motor to later type (part number 901604102DX)

Porsche 914 1970-76 (6 cylinder only 914-6)

Lightweight Flywheel with starter ring for Porsche 911 65 - 69

The flywheel with starter ring is an important component in the drive system of a vehicle, including the Porsche 911 from 1965 to 1969. This component has a crucial function in starting the engine.

The flywheel is a round plate that is connected to the crankshaft bearing. It serves as a support for the starter ring, which in turn is connected to the vehicle's starter motor. The starter ring consists of a series of teeth or cams that allow it to mesh with the starter motor. When the driver turns the ignition key, the starter motor is activated and engages the starter ring to turn the crankshaft and start the engine.

The flywheel with starter ring for Porsche 911 from 1965 to 1969 is specially designed and manufactured for these model years. It is made of high quality material to ensure reliable performance and durability. The starter ring is precision manufactured to provide a secure and smooth connection with the starter motor.

When servicing or repairing the drive system of a 1965 to 1969 Porsche 911, it may be necessary to inspect or replace the flywheel with starter ring. Damage or signs of wear can impair the performance of the starter or lead to starting problems. In such cases, it is advisable to replace the defective component with a high-quality spare part to restore optimum engine function.

The flywheel with starter ring is an important element for the smooth starting of the engine of a Porsche 911 from 1965 to 1969. By regular maintenance and the use of high-quality spare parts, car owners can ensure the reliability of their vehicle and improve the driving experience.

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

90110202602

90110202601

90110202307

90110202308

90110202600

90110202601

90110220100

90110220107

The product you are viewing cross references to these numbers

Crankshaft Standard (STD). Porsche 911 2.0ltr / 2.2ltr / 914-6

90110201101/2

Product Information

Standard Size Crankshaft (STD)
The standard size (STD) engine crankshaft is an essential rotating component for the early air-cooled Porsche models.

Fits:

Porsche 911 1965-1968 2.0L / 912 SWB (F)
Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Porsche 914-6 2.0L (1970-1976)

These first-generation air-cooled flat-six engines rely heavily on the strength, balance and accuracy of the crankshaft to deliver the smooth, free-revving performance that made the classic 911 legendary.

Whether performing a true-to-original restoration or a full bottom-end rebuild, this crankshaft ensures proper bearing clearances, smooth rotation and the reliability required to support both naturally aspirated and early turbocharged Porsche engines.

What the Crankshaft Does

This crankshaft plays a central role in engine operation by:

Transforming piston movement into rotational torque to drive the transmission
Maintaining exact journal sizing for correct oil film and bearing support
Ensuring balanced rotation across the entire RPM range
Supporting reliable lubrication through precision oil galleries
Handling high load and thermal stress typical of air-cooled performance engines
Providing dependable bottom-end stability for both normally aspirated and turbocharged setups

Without a properly sized and balanced crankshaft, the engine cannot run smoothly or reliably.

Why Crankshafts Can Fail

Although Porsche’s air-cooled crankshafts are renowned for durability, age, performance use and lubrication issues can lead to failure. Common causes include:

Oil starvation causing bearing damage and journal scoring
Contamination in the oil system leading to abrasive wear
High-mileage fatigue resulting in stress cracks or journal out-of-round conditions
Overheating reducing metallurgical strength
Incorrect machining or imbalance from past rebuilds
Detonation or pre-ignition placing excessive load on journals
Corrosion from long storage or moisture intrusion

Symptoms can include low oil pressure, vibration, bearing noise, metal debris in the oil, or excessive crankshaft end-float.

Why You Should Replace a Worn or Damaged Crankshaft

Installing a new or precision-engineered standard size crankshaft—matched to original Porsche tolerances—provides the foundation for a reliable, long-lasting engine rebuild.

Benefits include:

Restored bearing clearance and proper lubrication
Smooth rotational balance and reduced engine vibration
Improved reliability for both standard and turbocharged engines
Protection against catastrophic bottom-end failures
Extended lifespan for connecting rods, bearings and pistons
Consistent performance in high-heat air-cooled environments

For early air-cooled Porsche models, the crankshaft is one of the most critical components that determines the success and durability of any engine rebuild.

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

90110201101

90110201101

90110201100

901102917X

901102917 X

The product you are viewing cross references to these numbers

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bushing Genuine Porsche part 90110202501