Thrust issues with AFR gauge and Brawler carb

[Newbomb Turk]

Not sure what happens at beginning. Acceleration pump seems to have its own issues, when I press gas lightly at any speed it goes momentarily leaner and after that start to accelerate properly.

You are correct. He’s something I had to learn the hard way.

There is a puddle of fuel at the bottom off the intake manifold.

I can’t explain it nor do I have even a rudimentary understanding of it. Yet.

But there is a puddle and that puddle gets upset and moves with G forces. The way I understand it is that any sudden opening of the throttle blades drops the pressure in the intake tract. Any vaporized fuel becomes liquid again and it adds to the puddle and the puddle ends up dumping and you get a rich spike even it could be lean.

I’ve watched that Jon Kaase video over and over until I can’t see and I can’t see a puddle.

BUT, if you watch closely you’re A/F ratio you are logging you will see how the puddle influences A/F ratio on a running engine.

The upshot is my dumb *** should have paid more attention in school.

 

[Hysteric]

Hard to tell from those photos but most likely an ignition issue. When the calibration is close to stock then I would suspect ignition.

I've seen a 0.5v drop in alternator voltage output change the burn to make it look rich when the AFR didn't change.

 

[Newbomb Turk]

Hard to tell from those photos but most likely an ignition issue. When the calibration is close to stock then I would suspect ignition.

I've seen a 0.5v drop in alternator voltage output change the burn to make it look rich when the AFR didn't change.

I agree but when he has four open emulsion holes and that AFR graph he needs to clean that up first.

But I agree the ignition looks a bit weak. I just didn’t want to blow him up with more stuff. I know it gets overwhelming.