Soup Nazi
The artist formerly known as Don M
- Joined
- Sep 26, 2006
- Messages
- 1,197
J,
The stock plug is what determines the total travel if everything else is removed. i.e, rack stop plate, AFC, governor travel is maxed, etc.
Adding a Mack truck plug, machining the stock plug or stacking copper washers...whatever method is used will allow more forward travel if all the other things are allowing it.
That number could vary from pump to pump just from set up and machining tolerances of the pump itself.
In the end, one could add a plug and get more travel, but you can overtravel the rack and ultimately the plunger ( past the spill port ) and just dump the pressure earlier than wanted.
IMO, the stock plug is best!
Rack travel way out there 21mm's is doing very little or no good anyway. The fuel is late in the cylce, the smoke and late burning fuel/heat just goes up and up.
The stock plug is what determines the total travel if everything else is removed. i.e, rack stop plate, AFC, governor travel is maxed, etc.
Adding a Mack truck plug, machining the stock plug or stacking copper washers...whatever method is used will allow more forward travel if all the other things are allowing it.
That number could vary from pump to pump just from set up and machining tolerances of the pump itself.
In the end, one could add a plug and get more travel, but you can overtravel the rack and ultimately the plunger ( past the spill port ) and just dump the pressure earlier than wanted.
IMO, the stock plug is best!
Rack travel way out there 21mm's is doing very little or no good anyway. The fuel is late in the cylce, the smoke and late burning fuel/heat just goes up and up.