My gut reaction would expect 12-13" of vacuum on that combo, properly tuned and warmed up. Maybe the P4B, a non degreed cam and a generous PCV is reducing the number?
Maybe the carb's idle circuit is still way rich, and it would pick up if it were to be leaned some. That motor is likely going to want a 32-33 IFR and 70-ish LSAB, mixture screws 3/4" of a turn from seated. Just the fact that it's got a blocked power valve and a milled airhorn makes me wonder what else funky was done to it. That engine should pull hard to 5700. If it's not scaring the owner when he stomps it, something is seriously wrong.
__________________
I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
Last edited by chiphead; 06-15-2024 at 11:58 PM.
|