[acaskie]

With my 48 IDFs, I use a standard mechanical pump and the Inglese dial regulator set at 2.5 lbs, and have had no problems when running. In a previous webered vehicle, when I used an electric fuel pump in the trunk, I used a firewall-mounted Mallory 4207 regulator adjusted to 3lbs also to a good result.

If you have any problems with leakage after a hot shut down (out the butterfly shafts onto the manifold), a return line to the tank (to bleed off the pressure in the system after shutdown) shouyld fix that as well.