Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

Bewy said
24" of vac at idle? Sounds high.

The engine was just rebuilt so that could be part of it, the cam is very mild as well. The t slot is a square so I wouldn’t say the blades are too far closed.

Newbomb Turk said
I don’t have time to give you a full reply but stop looking at the O2 sensor. 15:1 at a cruise is bitching if your ignition will fire it.

Learn to read plugs and then use the O2 and believe the plug over the sensor.

And never tune to a hard number. Give it what it wants.

I mainly use the AFR gauge to see how steady the fuel is. I should’ve added that it does have enough fuel to maintain cruise, the afr is pretty smooth in the 15-16 at cruise, my main concern is when I get on the throttle to say go up an incline and I don’t stomp on it, just press it down a bit more, I can feel the surging start (first it feels flat, then I can hear the engine cutting out and the afr gauge goes crazy)