wkilleffer
Jedi Knight
Offline
Hello everyone,
Now that the valves are adjusted and the ignition is working properly on my MGB, I decided to have another crack at balancing the carbs. The engine's an 18GK and the carbs are HS4.
I used a new to me tool that involves putting metal rods in place of the dashpot pistons to gauge airflow, and making adjustments based on carb behavior when pushing down or lifting up on the rods. Pushing down on the front carb seemed quite springy. The back carb was less springy and didn't go down so far, even though the indicators said they were breathing in the same amount of air. Also, I think the back carb was no less than three flats richer than the front.
Carb adjustment is a major source of frustration for me. I'm just coming to the realization that it doesn't always work according to what the books or instructions say. But is something wrong with my carbs? They look old, but I had them rebushed and shafted about four years ago, and the rebuilder put new floats and gaskets on them as well.
Unless someone here comes up with a better solution, I'm going to take them off the manifold and have a look inside of everything to make sure nothing's impeding the airflow.
Also, anyone know where I could get a good sporty-looking K&N setup for this car? One of the supporting vendors of this site makes something, but they're kind of rich for my blood right now.
Thank you,
Now that the valves are adjusted and the ignition is working properly on my MGB, I decided to have another crack at balancing the carbs. The engine's an 18GK and the carbs are HS4.
I used a new to me tool that involves putting metal rods in place of the dashpot pistons to gauge airflow, and making adjustments based on carb behavior when pushing down or lifting up on the rods. Pushing down on the front carb seemed quite springy. The back carb was less springy and didn't go down so far, even though the indicators said they were breathing in the same amount of air. Also, I think the back carb was no less than three flats richer than the front.
Carb adjustment is a major source of frustration for me. I'm just coming to the realization that it doesn't always work according to what the books or instructions say. But is something wrong with my carbs? They look old, but I had them rebushed and shafted about four years ago, and the rebuilder put new floats and gaskets on them as well.
Unless someone here comes up with a better solution, I'm going to take them off the manifold and have a look inside of everything to make sure nothing's impeding the airflow.
Also, anyone know where I could get a good sporty-looking K&N setup for this car? One of the supporting vendors of this site makes something, but they're kind of rich for my blood right now.
Thank you,