Annular boosters on a Tunnel Ram
Are you all familiar with this?
D is the main air bleed.
A and B are the holes in the air tube (air well) in the main well. that is "emulsion holes"
When the holes in the well are bit too big, or there are too many, the fuel will start to flow sooner but may go rich then lean before stabilalizing.
That can also happen to some extent if the main air bleed is too big.
The way to approach the problem is to use the main air bleed to insure the AFR stays flat through the top rpm we need. That's the main job of the air bleed system. With that established then experiment with the e-holes.
Does it always work that neatly? Maybe for someone with more experience, but its how I try to work it in.
The MAB and e-holes have to be in the ballpark or its going to be pretty unpredictable.
Are you all familiar with this?
D is the main air bleed.
A and B are the holes in the air tube (air well) in the main well. that is "emulsion holes"
When the holes in the well are bit too big, or there are too many, the fuel will start to flow sooner but may go rich then lean before stabilalizing.
That can also happen to some extent if the main air bleed is too big.
The way to approach the problem is to use the main air bleed to insure the AFR stays flat through the top rpm we need. That's the main job of the air bleed system. With that established then experiment with the e-holes.
Does it always work that neatly? Maybe for someone with more experience, but its how I try to work it in.
The MAB and e-holes have to be in the ballpark or its going to be pretty unpredictable.