What kind of supercharger does Porsche 928 have?
The Vortech V-7 YSi centrifugal supercharger is the heart of this engine’s airflow. In addition, you can see the unique, complex path of the intake tubing required in the car’s chassis.
What happens if you snap the timing belt on a Porsche 928?
In all but the very early 928’s a snap of the belt allows the valves and pistons to crash resulting in catastrophic engine (and financial) damage. Clearly the function of the timing-belt and its related components is absolutely critical.
What kind of intake manifold does a Porsche 928 use?
One of the largest restrictions on a 928 engine is the intake manifold itself. For this project, 928 Motorsports created a custom intake manifold of their own design out of glass-filled nylon runners and aluminum sheetmetal plenums–yes, plural.
How often should you service a Porsche 928 S4?
While Porsche specifies a service interval of 60,000 miles, most 928 specialists recommend a conservative 40-45,000 mile service. Due to its location the water pump should be replaced. Additionally the belt tensioner should be rebuilt and Tony Harkin has some excellent information on his site at http://members.rennlist.com/v1uhoh/.
When to change timing belt on Porsche 928?
The 928 has a timing belt that should be changed along with the water Pump every 50K miles. The 16 valve engines pre -1985 are non interference engines and will not damage the engine if the belt breaks. I have never seen one really break, but the teeth do get chewed up causing the belt to slip accomplishing the same end result.
What kind of engine does a Porsche 928 have?
The belt on the 928 is reputedly the longest toothed belt ever used on a production auto. It drives either two or four overhead camshafts, the oil pump and the water pump, and several other pieces of mechanism. We are not noted for taking it easy on our engines, so it gets to see rapid acceleration, lots of gearshifts, and high RPM operation.
Is the belt tensioner in a Porsche 928 self tensioning?
The belts are NOT self tensioning. There is a belt tensioner in the belt system, but it only accounts for a small amount of stretching. If never serviced, the belt will eventually fail (lose teeth or part). In either case, the result can be from “just disabled” to “needing new valves”.
Is the Porsche 944 a world class car?
The 944 is a very reliable and fun car to drive, but it is not in the class of a 928. The 928 is a world class car that still ranks very close to one the best production performance cars ever. For power and handling there are very few competitors.