I was not commenting on the A/F ratios @ idle w/the cutouts. I was meaning the A/F ratios changing @ W.O.T. Got any videos of the A/F ratios changing @ Wide open throttle w/the cutout open & then closed?
In any case, there is pretty much no time out on the street I can aggressively put the pedal to the floor without the tires starting to break loose on the pavement, so plenty of fun for street driving. And as I said, it gets 17+ mpg.
I think you could get 17+ MPG w/a properly tuned Quadrajet? No? It just takes longer to get there.
Are you saying your 462 Buick does not break the tires loose on the street w/3.89 gears? What tires are you using? Don't take this as I am knocking down your car, just wondering why it does not run faster than it does.
Back to the Firebird. I properly re-timed the cam, it looks like with the thicker than stock head gasket on it the cam was timing was 1º advanced. So I dialed back what I set it too on Monday and set it to what should be 4º advanced. More realistic setting.
The valve springs and engine gasket kit arrived today, so I have everything I need to rebuild the engine now.