VE pump- figuring out loud

[dragrdan]

If it is fill time related, the graph of rpm vs fuel should be a steady sideways j(proportional).

Float problems would be more of a "lightning bolt" shaped graph.

[ford69557ci]

Mine started gradually defueling and by 3700 was down a lot. It isnt like it just loses all at 3700. The vw rotor is lighter and that helps the rpm capability. The vw pump is also not trying to fill a 14mm setup through tiny passages. Less cylinders, less pump volume all enables them to fuel higher than ours.

[dragrdan]

From the looks of the 4mm camplate I received, the base is in the same position, and the extra 1.2mm of lift is added to the lobe. Therefore, if the spill port is being uncovered due to lift, it is at the full stroke end and we need to shift the camplate,(or rotor) towards the input of the pump by ~1mm to keep it covered. Are there any other issues that would be caused by doing this?

@ford, seeker, and anyone else who installed a 4mm camplate: Did you make any other provisions for the extra lift to keep the spill port covered? If so, what were they.

[ford69557ci]

I sold my truck in the middle of my testing and parts breaking so I never did go at it again. I do have another truck now but the body, lift, and tires and wheels are comin before the power so it will be awhile before I get to messin with a pump again. My guess would be do design a custom rotor???

[KTA]

6cyl Ve at 4000 rpm = 12000strokes/min
4cyl ve at 6000 rpm = 12000strokes/min

Now do you see why a VW pump can fuel and make power higher than ours? You want high rpm fuel buy an inline pump like a P7100, it is by FAR the best solution.

[PToombs]

You want high rpm fuel buy an inline pump like a P7100, it is by FAR the best solution.

Blasphemer!

[dragrdan]

I agree KTA,(and PToombs ). I have said that I am not looking to increase the RPM capabilities of my pump, just looking to tune it for better performance within the range I already have.