Hey thanks Guys,
Colin, no not original fuel pump. its the "CB Performance" rotary, with 3.5psi output and I have the double headed Holley Fuel pressure regulator on there, system checked while running with a gauge tied in.
I'm now about 90% certain that I am uncertain about switching to FI. at least on this engine. maybe if i ever do get around to building one myself. I have a huge box of FI stuff with nearly 3 of everything, a fuel tank, cutout bits of aircleaner stand, etc. some gorgeous fuel pump and FI wiring harnesses...
it does sound nice sometimes doesn't it!
Satchmo, i know its impossible to be in someone elses shoes via the internet, but i assure you i inspected these carbs like nothing else i have ever done. i had 3 sets, and did everything to select the best and compatible parts from the lot.
my throttle plates do look like the mix screw was cranked in a bit ...in fact, i think one of my few other threads on itinerant air was about this specific thing with pictures. that thread showed me i may have been splitting hairs. census was they were OK.
m pretty confident the jets weren't tampered with - i had quite a few to select from, and they were stared at too!
throttle shafts were rebuilt by keifernet off the samba. minimal play, comparable to a nos one i have. (wrong style though, too old, cant use it)
Dont get me wrong guys, i have no flat spot, feels like pretty impressive power at speed given its the 1700 baby of the T4 engines, and oil temp never gets over 220 any more where as last year it would rock pretty high (pre-anal carb rebuild)
really, my only issue with the bus is a perceived, and sometimes quite noticeable chuffing style noise, which i believe could be a knock developing. I had my head in there with my ear on the fan shroud after a long drive (man it runs cool/smells good!) hugging the engine and listening to the sound deep inside. would have looked very strange to any passer-by. unrelated to fuel delivery! anyhow I'll keep an eye on it.
I have not ever verified my accelerator pump output volume.
so...does fuel percolation occur with electric or stock pumps?