Roger, 2 - 2 1/2 lbs. is all SU's need. Get a regulator and a guage. Mount the guage on a "T" downstream of the regulator. The regulators with the numbers on them aren't all that accurate.
I have to ask again........Should this 79 1500 with SU's and a couple of thou skimmed from the head still be timed to 10* BTDC? Dave Burlington WI Roger Elliott wrote: > I have been chasing similar problems for quite a while. It never > occurred to me that the problem could be too high of fuel pressure. > > What did you need to set the pressure at to make the car run correctly? > I stopped at Napa, they had one that could be adjusted 2 - 4 pounds and > one that could be adjusted 4-9 pounds. > > Thanks, > > Roger Elliott > > Paul Meyer wrote: > >> Several years ago I swapped carbs on my '78. >> Similar fuel problems resulted, which were eventually identified as being >> caused by the new carb requiring less fuel pressure. Idle was ok, but as >> soon as I increased rpm or fiddled with the choke, it would roughen or >> stall. I too replaced the fuel pump, but that only made things worse. >> >> >> I put in a cheap, in-line fuel pressure regulator, and got some improvement, >> but the cheap regulator caused flow problems in high rev conditions. >> >> Ultimately, I put in a higher quality fuel pressure regulator, and that >> solved it. >> >> >> >> Paul F. Meyer >> >> Home Phone: 781-551-8574 >> Cell Phone: 781-801-3170 >> e-mail: [EMAIL PROTECTED] _______________________________________________ Spitfires mailing list Spitfires@autox.team.net http://autox.team.net/mailman/listinfo/spitfires