On another forum a guy was talking about grinding down the fuel pump eccentric on a cam to be able to press on a toothed wheel of some sorts for a cam sensor that could be mounted through a fuel pump block off plate. This got me thinking, do you even need to do anything to the fuel pump eccentric? Could you not simply point the high spot of the eccentric towards the fuel pump openning and run a sensor through a block off plate towards the cam until it touches the eccentric then back off a hair? It would work like a half moon sensor (like the dodge 318 one on the EMC hemi) with only a shorter signal interval.
This of course may not likely work on all engines, but ones you could get close to the eccentric with some kind of hall sensor. Of course the clocking of the eccentric is probably important and changes engine make to engine make (or maybe even cam to cam )
I'm wondering about on my OHC Pontiac engine, for first round start up I'm going to use the distributor points contacts for the Tach signal, could I use the fuel pump eccentric for a cam signal and do sequential right off the bat? Originally I was going to start with batch fire until I figured out a crank sensor to make the distributor the cam sensor.
The fuel pump is right next to the distributor.
The shiny streak to the left of the gear is the fuel pump eccentric.
Thoughts? Would it work?
This of course may not likely work on all engines, but ones you could get close to the eccentric with some kind of hall sensor. Of course the clocking of the eccentric is probably important and changes engine make to engine make (or maybe even cam to cam )
I'm wondering about on my OHC Pontiac engine, for first round start up I'm going to use the distributor points contacts for the Tach signal, could I use the fuel pump eccentric for a cam signal and do sequential right off the bat? Originally I was going to start with batch fire until I figured out a crank sensor to make the distributor the cam sensor.
The fuel pump is right next to the distributor.
The shiny streak to the left of the gear is the fuel pump eccentric.
Thoughts? Would it work?
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