[DDS]

Engine is a turnkey FAT motor, dyno tuned and run in with 44IDFs in place at their facility. Idles beautifully, runs great, very strong, until fuel pressure drops. Heads were totally rebuilt and have larger than stock intake and exhuast valves (can't recall the size) and were ported, manifolds matched etc.....

BTW, FAT has been great to deal with, nice people, very helpful.

I expect the issue is simpler and more basic than carb size, (I would hope so!) at least I will be certain to eliminate the possibility fuel supply problems before going further. This setup worked fine with the previous engine but sat for several years.

Have not had a chance to run again with revised fuel system, but will hopefully tinker this weeekend. I have a 3.5 psi vane type pump, will run without a regulator but will rig the gauge and watch what happens.

Have some experience with webers - last engine had 42DCNFs, I rebuilt a set from a maserati merak, jetted, synched, setup myself, am well acquainted with the basics, though I am hardly an expert.

Will re-read the weber books I have for "first principles" on fuel supply, (just in case) but the question was asked hoping to get some opinions from those (like John Rogers) who have thoughtfully built and learned from track cars, without budget as the first priority.

Thanks as always, going to dig out the weber books.

Dave