by DTanklage » Sun Oct 28, 2007 2:17 pm
i came up with some ideas for a psycho fuel system and explained my design to josh. he was going to have a pump flowed and try this on a stand (to see exactly what it is worth) but now he is working on a p-pump instead. the system i designed would mostly be for dyno runs, 1/4 mile times, or maybe for pulling? dont know how this would work for sure, but if someone wants to give it a shot here is my idea:
the principle is simple - create a runaway condition within the ve for a short period of time (just when it is required, dyno, or 1/4 mile) and be able to stop the runaway when ever you want to. how would I do that? well, I have two different ideas, both very similar - the only difference is in the vane pump area of the ve.
on the first design, which is very simple, all you do is make a seal retainer for the front seal and feed the case body thru the return. install a high pressure pump (like 300 psi), maybe a regulator, a check valve, and for sure a solenoid (so you can kill the high pressure feed instantly) and run it into the return. put that set up on a stand and see what kind of case pressure the ve can withstand and what it does to output. the pump top mating surface may have to be machined and something other than the rubber o-ring used to seal the case. at some point the high pressure might lock up some of the case internals, I don’t know, but there is only one way to find out...
second version is similar cept do away with the vane pump entirely. build a double or triple seal holder to go in its place and run a additional 60 (or so) psi pump for the primary fuel. plumb that in thru fuel shut off solinoid (with a check valve of course) and put the 'big fuel' into the case as in the above system
whatcha think?
now you know why I kept asking if you guys would install a case pressure gauge on your ve
mine is tired, don’t know if I could trust its numbers to be typical
and it is getting 21 psi inlet pressure from lift pump which is probably affecting the case pressure
*another thing someone could try would be to remove the fuel screw and build a system with a sealed rod on a electric solenoid that when activated it would push the lever all the way to the front (causing run away)
or if one was really bored they could try both...
you may want to have some spare ve's laying around. don’t think you would want to take the ve off your daily driver, throw it on a stand, and start throwing ridiculous pressures at it
don tanklage
slowass 2nd gen - ADRL pro mod bike #798 - 4.26 @ 175 mph (1/8m) - how quick do you wanna go?