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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 2.0ltr - 1965 to 1969
Porsche 911 2.2ltr - 1970 to 1971
Notes
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) and is designed for operation with titanium connecting rods only.
If you want to run this crankshaft with steel connecting rods, use crankshaft part number 90110201100/1. 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.
You can easily swap out any 2.0ltr or 2.2ltr 911T crankshaft that doesn't have factory counterweights for this crankshaft with counterweights.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91610201600
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
Fits:
Porsche 964 3.6 Turbo 08/1992-07/1994 (M65.40)
For Single-Belt Conversion, with Air Conditioning
Click 'Zoom in' for large parts diagram.
Diagram ref no 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410215020
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
Pulley hub for 89-94 964 tapered snout crankshaft.
Machined from heat treated alloy steel and yellow zinc plated these are exact reproduction of OEM part.
For OEM replacement or use with 3609001402 single belt pulleys.
Fits:
Porsche 964 ('89-'94) Crankshaft Pulley Hub
for Tapered Snout Crankshaft
*Pulley in image is not included.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410205001
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Standard Size Crankshaft (STD)
The standard size crankshaft (STD) is a critical
rotating component used in Porsche 964 engines.
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO S 3.6L 1991-93
Precision machined to maintain original journal dimensions, this crankshaft ensures proper bearing clearance, smooth rotation and reliable power delivery. When rebuilding a high-performance flat-six engine, choosing the correct standard size crankshaft is essential to restoring the engine’s structural integrity and achieving long-term durability.
Engineered to meet the performance characteristics of the original design, this crankshaft is ideal for restorations, performance rebuilds and repairs requiring uncompromising accuracy and balance.
What the Engine Crankshaft Does
This crankshaft delivers several vital engine functions,
including:
- Converting piston motion into smooth rotational force
- Maintaining
precise journal dimensions for correct oil film and bearing clearance
- Balancing
the rotating assembly to minimise vibration and engine stress
- Supporting
consistent oil delivery through internal lubrication channels
- Ensuring smooth power transfer across all RPM ranges
- Forming the structural core of the bottom end assembly
A well-balanced standard-size crankshaft is essential for proper engine behaviour, especially in performance-prone flat-six units.
Why Crankshafts Commonly Fail
Despite being exceptionally robust, crankshafts can fail due
to age, wear or incorrect operating conditions. Common causes include:
- Oil
starvation leading to journal scoring or bearing failure
- Metal
fatigue after years of high-RPM use or detonation events
- Overheating
compromising the metallurgical integrity of the crankshaft
- Contamination
from debris causing gouging or premature wear
- Imbalance
or improper machining from previous engine work
- Severe
knock or misfires bending or twisting the crankshaft
- Prolonged high load driving accelerating fatigue in older engines
Symptoms typically include low oil pressure, knocking noises, excessive vibration, or visible scoring on journals during teardown.
Why You Should Replace a Worn or Damaged Crankshaft
Replacing a compromised crankshaft with a precision-built, standard size alternative engineered to match the original specifications ensures your Porsche 964 rebuild is stable, durable and capable of performing as intended.
Benefits include:
- Restored bearing clearance and oil pressure stability
- Reduced engine vibration and smoother power delivery
- Stronger resistance to high-RPM and high-load conditions
- Improved longevity of other bottom-end components
- Prevention of catastrophic engine damage or seizure
- More accurate balancing for performance and reliability
During an engine rebuild, the crankshaft is one of the most critical components to inspect and replace if any wear is detected.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410202108
The product you are viewing cross references to these numbers