Re: How to fix the over rich condition EASILY
His basic theory works...in theory.
Fuel pump flow VOLUME decreases as pressure increases. SO the higher the pressure out of the pump, the less volume it flows.
The plan is to have the stock pump run normally 90% of the time. Then when he uses nitrous, the MSD pump would become a "pressure" pump, and the stock pump would be a "volume" pump.
The Pressure behind the MSD pump could be as low as 6-20 PSI. at that low of pressure the stock fuel pump should be able to flow serious Fuel VOLUME.
The MSD pump, when activated, will pressurize the large VOLUME that the stock pump is providing it.
The stock pump provides high volume, low pressure, the MSD pump creates high pressure, low volume.
There are many cars out there that from the factory use a 2 fuel pump setup, similar to this.
My only reservation with his setup is that the fuel could, in theory, flow backwards through the MSD pump when it is off. Unless the MSD pump has some kind of 1 way valve built into it. Even if this happens, it would be a temporary problem as eventually the fuel pressure on both sides would equalize. I would still install another 1 way valve AFTER the MSD pump to prevent fuel from reverting through the MSD pump.
In my opinion, this setup is WAY too complicated and way to failure prone for what should be a simple wet shot.
I do agree with Brendan than a Talon/Eclipse fuel pump would solve the problem for less money, and be much simpler, not have as many points of potential failure. There are so many fuel line connection points, and each one is a point of failure. Each electrical connection between the gas pedal, the nitrous controler and the MSD pump are points of failure. The one way valves are also points of failure.
A simple upgrade fuel pump and 100% stock lines would eliminate 75% of these potential failure points.
Granted...I'm not saying that any of these points WILL fail, they are simply potential failure points. The more potential failure points in a system, the more you increase the chance that it will fail. The old KISS principle.
<hr width=60% noshade size=1 align=left>quote from 4DoorGL: <b><i>"Told you. Random is cool as hell in person, even if he is a dick on the net <img src=/images/forums/snitz/wink.gif width=15 height=15 border=0> (j/k)" </b></i>
Leave it to Random to Needlessly complicate things.
Edited by - random on 03/10/2002 12:46:12 PM
Leave it to Random to needlessly complicate things.