Here is what I have found in the testing of the 14mm VE I was testing a few years back. High lift cam plate decreases rpm potential as does the 14mm head and rotor. It has to due with chamber fill time. I spent tons of time porting, machining and doing everything possible to make the little VE move enough high rpm fuel to be competitive in my local 2.6 class. In the vane pump I turned the rotor down and noticed case pressures holding on for higher rpm, but the the vane pump exploded due to not enough of the vane being in the rotor and over stressing them. As for the governor I never changed anything in mine, different springs made it pull as high as I was looking for. All the porting and vane pump mods you can think of still will not make the internal pump keep up with the head and rotor. I found that I got the most flow feeding 50-60 psi to the main inlet then feeding 150+ into the shutoff solenoid port with a belt driven pump. I had a check valve inline to keep the case pressure in until it dropped enough for the belt driven pump to take over. As for delivery valves i found a set of non ic ones turned down on a small lathe worked great. I also had drilled holder as i was trying some .093 .120 lines. I have a whole notebook full of numbers and flow rates from when I was messin with the VE so if anyone has an idea run it by me. I might have already tried it lol. I went p pump so I am out of the VE game, at least it's still a 92 though.
