What do the timing marks mean on a Porsche 911?
Different year 911s had different timing points, but it should be marked with a number “5” or similar marking. This mark indicates the timing mark for five degrees before top dead center, or after top dead center, depending upon the year and engine.
How to set the dwell on a Porsche 911?
Be very careful not to place any tools or fingers near the fan when the engine is running, and watch the cord of the timing light as well. On the pre-1977 911s, you must set the dwell angle for the points as well as the timing position of the distributor.
Where does the distributor point on a Porsche 911?
The objective is to turn the crankshaft so that cylinder #1 is at TDC (the Z1 mark aligns with the notch on the fan assembly), then install the distributor so the rotor points to ignition wire #1. The Z1 mark on the crankshaft pully represents the TDC point for BOTH cylinders #1 and #4, so you need to make sure it points to cylinder #1.
How to set idle speed on Porsche 911?
For details on setting the idle speed for your 911, make sure that you look at Projects 29-31, which are specific to each different type of fuel injection system. To properly set the timing, you may have to remove the vacuum hoses from the distributor.
Where are the timing marks on a Porsche 911?
There are three timing marks (notches) on the crankshaft pulley, these indicate the TDC points for the three pairs of cylinders. There is also a notch on the fan assembly, this is the alignment point for the timing notches on the crankshaft pulley.
The objective is to turn the crankshaft so that cylinder #1 is at TDC (the Z1 mark aligns with the notch on the fan assembly), then install the distributor so the rotor points to ignition wire #1. The Z1 mark on the crankshaft pully represents the TDC point for BOTH cylinders #1 and #4, so you need to make sure it points to cylinder #1.
Be very careful not to place any tools or fingers near the fan when the engine is running, and watch the cord of the timing light as well. On the pre-1977 911s, you must set the dwell angle for the points as well as the timing position of the distributor.
When did Porsche start using the Motronic system?
In 1984, the factory employed the use of the Bosch Motronic engine management system, which incorporates the fuel injection and ignition systems together. The timing and dwell of the Motronic system is controlled by its central computer, and cannot be adjusted.
Where are the breaker points on a Porsche 911?
On the earlier cars, the breaker points are controlled by a cam that is located on the main shaft of the distributor. As the distributor rotates, the cam pushes the points open. At this point the coil releases its stored energy and sends a charge to the spark plug determined by the position of the rotor inside the distributor cap.
What was the production number of a 1977 Porsche 930?
Production numbers was 727 for 1977 for the USA market. Porsche began experimenting with turbocharging technology on their race cars during the late 1960s, and in 1972 began development on a turbocharged version of the 911.
When was the first Porsche 911 Turbo made?
PORSCHE 911 Turbo (930) 1977 – 1989. Member of the same 930 series and first launched in 1974, the Porsche 911 Turbo was revised in 1977 when the German manufacturer unveiled an upgraded version of the car.
When did Porsche switch to group b-208?
FIA Nr. 3076 remained in effect until replaced by FIA B-208 in 1 Mar 1982 for Group A/B when the homologation designation was changed from “Porsche Turbo” to “911 Turbo”.