Reply to "Weber IDF's and Panteras"

One more little comment: all the books say 'run 3 psi fuel pressure in Webers'. This is erroneous; whats more important is enough fuel VOLUME for the engine's intended use. One of my more satisfying 'tunes' happened at a friend's CA dyno shop, where a real 289 Cobra with quad Webers was being set up for the Monterey Historics. Lots of popping & banging and it wouldn't rev above 5000 rpms. When the dyno operator asked me what I thought, I looked at the 'official' setup and suggested they remove and throw away the chrome 3 psi fuel pressure regulator. I said, you can always shut it down if the engine doesn't sound happy, so the owner reluctantly agreed. The little engine immediately soared to its 7000 rpm rev-limiter with no problem! The dyno instrumentation said all normal on all its readings. That li'l tip got me a well appreciated cold beer at Monterey from the owner a month later, and he finished his best ever Historic race.
Use a good quality pro fuel pressure regulator with at least 3/8" internal passages, although I've personally found no problem running full 351 C-std-pump 6 psi fuel pressures into Webers of all kinds on the street. Stock floats and needle/seats seem to be able to take the slight overpressure.