[Shotimes] fuel pressure regulator and 255lph pump issue

[Adam Parrott]

Carl,

Just about everything you would ever care to know about the factory fueling
system can be found hashed out in this thread here:

http://www.shoforum.com/showthread.php?p=28394

Adam


  ----- Original Message -----
  From: Carl Prochilo
  To: shotimes@autox.team.net
  Sent: Monday, September 12, 2005 8:45 PM
  Subject: Re: [Shotimes] fuel pressure regulator and 255lph pump issue


  Interesting, I did not know this.  Is there a write-up somewhere that
  describes this system?  From what I saw when I replaced my pump, it is
  fairly low tech, but mine is a 92.
  --
  Cheers,
  Carl Prochilo
  92 Ultra Red Crimson

  On Mon, September 12, 2005 6:49, Adam Parrott said:
  > Something else to remember is that the '89-'90 cars have a factory
installed
  > 2-speed fuel pump system that is absent/disabled on the later ('91 and
up)
  > cars.  Since this two-speed system runs at low speed (and thus low flow)
at
  > lower TPS voltages, the '89-'90 cars usually do not show the same over
  > pressurization problems with the 190lph and perhaps even the 'regular
  > pressure' 255lph pumps.
  >
  > Adam
  >
  >
  >   ----- Original Message -----
  >   From: Bruce Malachuk
  >   To: 'Carl Prochilo' ; shotimes@autox.team.net
  >   Sent: Sunday, September 11, 2005 9:42 AM
  >   Subject: RE: [Shotimes] fuel pressure regulator and 255lph pump
  > issue
  >
  >
  >   I've found that the 190lph won't always over run the stock FPR as a
  > friend has one in his car and his fuel pressures are where they are
  > supposed to be.
  >   FWIW I think the MTX SHO's got a 110lph, and a 155 is the next
  > larger step that one can go to without running the possible risk of
  > overrunning the stock FPR. I have read enough accounts of the 190
  > overrunning, but it seems it doesn't happen to everyone.
  >
  >
  >   Bruce J Malachuk
  >
  >   * 94 Opal Frost MTX
  >   * 93 Emerald Green MTX - SOLD
  >   * 93 Black ATX - New Parts CAR
  >   * 95 Silver Frost ATX SE - SLO -Buyer waiting
  >   * 96 TR - Cam Failed parts car :-(
  >
  >
  >   -----Original Message-----
  >   From: shotimes-admin@autox.team.net
  > [mailto:shotimes-admin@autox.team.net]
  >   On Behalf Of Carl Prochilo
  >   Sent: Saturday, September 10, 2005 9:23 PM
  >   To: shotimes@autox.team.net
  >   Subject: Re: [Shotimes] fuel pressure regulator and 255lph pump
  > issue
  >
  >   The stocker is not 155lph.  If you were to buy that size pump from
  > say apeusa.com, it would be considered an upgrade.  This should be fine
  > for a BOS upgraded SHO.  Even the 190lph pump will overrun the FPR.
  >   --
  >   Cheers,
  >   Carl Prochilo
  >   92 Ultra Red Crimson