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Bosch P7100 Pump Timing
How do I check my CPL number?
The Control Parts List number or CPL number is located on the engine data plate, which can be found on the drivers side of the timing gear cover. The engine data
plate includes such information as the CPL number, engine serial number, and pump timing information.
How do I determine what the stock pump timing is?
The pump timing as set by the factory when the engine was manufactured, is also located on the data plate which can be found on the drivers side of the timing gear
cover.
What are the advantages of advancing the pump timing?
The advantages of increasing the pump timing are increased fuel economy, increased top end horsepower, increased throttle response, decreased exhaust temperatures,
decreased hydrocarbons, and smoother operation.
What are the disadvantages of advancing the pump timing?
The disadvantages of increasing the pump timing are increased noise, increased NOx emissions, increased black smoke particulates, decreased bottom end horsepower, and
increased cylinder head pressure.
How much should I advance my pump timing?
For stock trucks or trucks with only mild horsepower increases, the typical rule of thumb is 1° advance is better, 2° advance is not.
Do horsepower modifications effect the pump timing?
For higher horsepower applications, the proper timing will vary according to your specific modifications. Things like what injectors you have, what RPM you want to
achieve, changes to the head gasket, and other factors can effect the pump timing and how your specific application needs to be setup.
How do I convert degrees of timing into plunger lift in millimeters?
First check to see what CPL number your engine model / year is. Then use our Bosch P7100 Plunger Lift timing chart.
Are there any TSB's related to pump timing?
TSB 18-11-96 applies to CPL numbers 2022, 2023, and 1863. Check the notes at the bottom of our Bosch
P7100 Plunger Lift timing chart.
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