93flatbed

Well one of my pumps started to not want to idle and low power out put, so threw on one of my spares and took it apart and here you go . Gotta order a few parts on monday. Any suggestions while it's apart?

maybe368

I can't help with the pump, but I sure would like to see you put it back together. I am waiting on knee surgery, but if that doesn't interfere, and you don't mind, I sure would drive out your way to see that...Mark

dieselJon

Looking through your posts, seems like you are wanting more power.

How much do you want?

93flatbed

Mark, it will be going back together at my dealership, I have a cleaner and better place to work there. I'm sure we can work something out.
Jon, I'm wanting to break 450 but I'd be more than happy over 400. What are you thinking. I'm really wanting to know the secrets that some know inside the pump more than a cam plate or the 14mm head. I've read about shaving a piston or something like that? I'm not scard to try/pay to have something tried. I know a guy at a very good mechine shop.

dieselJon

Well, I have somethings to try with the extra pump I have. Those things include:

Enlarging the pump inlet to the vane pump
Either making a 6 blade or just cutting 4 more slots for an 8 blade vane pump. Should help with keeping up flow at high rpms.
The timing piston, adding the spacer and getting a stiffer spring so when adding more fuel, it doesn't advance on its own
One restriction that no one has addressed was the inlet for the rotor in the head...
Fuel return regulated by an adjustable external source.

The piston shaving is for the timing advance. I have only seen a couple people do it but I think M&H have the right ticket with the spacer. Or is it DNR???

There is a couple more things I am thinking of but I need to do a bit of testing first.