Simplest mechanism for increasing fuel pump pressure (while simultaneously decreasing the volume available) is for the spring to break. The shorter spring has a higher spring rate than the longer (unbroken) spring and can increase the pressure up to double.
HTH, Donald. > From: "griffco" <[EMAIL PROTECTED]> > Date: Wed, 8 Oct 2003 07:53:34 -0600 > > Nolan Penney said: > > > If the diaphragm were to stiffen with age, that could result in higher > > pump pressures. Never seen that actually happen, but theoretically it's > > possible. > > I wonder how this is possible? The diaphram is driven by the spring, which > in turn is loaded (compresed) by the lever running on the cam. If the > diaprhagm gets stiffer, the spring has less chance of moving or flexing it. > The result is less fluid moved, either due to less movement of the > diaprhagm, or due to the diaphragm moving slower on each stroke. Anyway, > that's the way I see it. I've had diaphragms stiffen up to where they won't > move at all. > > cheers, Fred *** http://www.team.net/the-local *** *** unsubscribe/change address requests to [EMAIL PROTECTED] or try *** http://www.team.net/cgi-bin/majorcool *** http://www.team.net/mailman/listinfo *** Archives at http://www.team.net/archive *** Edit your replies!
