fwtexasbj8
Senior Member
Offline
Hey guys, I need help again getting the old girl back running well after not being driven much for the past few years.
I recently rebuilt my BJ8 carbs and since, I seem to have very little power and the engine seems sluggish. I have gross jets in the floats and when I get the airflow the same and the jets adjusted, the tops of the jets are between .125 (front) and .165 (back) below the jet bridge. I have removed the float covers (again) and adjusted the float levers to 7/16" per my service manual but when I look down into the jets, it looks like the fuel level is 1/8-1/4 inches below the top of the jets. The car was idling good up until recently when I am starting to see some decay as it gets hot. I am convinced the timing is good and I checked the valve rocker clearances when I had the cover off last weekend and they were all good.
Does anyone know approximately where the top of the jets should be relative to the bridge and how far below them the fuel level should be? I have read the fuel level should be "just" below the jet top but am unclear how far. Do the gross jets have any effect on float lever setting?
When I rebuilt the carbs, I verified the needle diameter but it has a tapered neck without a clear indication of where it should be installed flush with the bottom of the piston. I did my best to set it right where the needle starts to taper and then was careful to set the other one with the same amount below the piston. Does anyone have a better way to set tapered needles?
Finally, any other tips to correct the lack of power? I really think it is carburation since the car had good power before the carb rebuild but have about tapped out my guesses.
Doug
I recently rebuilt my BJ8 carbs and since, I seem to have very little power and the engine seems sluggish. I have gross jets in the floats and when I get the airflow the same and the jets adjusted, the tops of the jets are between .125 (front) and .165 (back) below the jet bridge. I have removed the float covers (again) and adjusted the float levers to 7/16" per my service manual but when I look down into the jets, it looks like the fuel level is 1/8-1/4 inches below the top of the jets. The car was idling good up until recently when I am starting to see some decay as it gets hot. I am convinced the timing is good and I checked the valve rocker clearances when I had the cover off last weekend and they were all good.
Does anyone know approximately where the top of the jets should be relative to the bridge and how far below them the fuel level should be? I have read the fuel level should be "just" below the jet top but am unclear how far. Do the gross jets have any effect on float lever setting?
When I rebuilt the carbs, I verified the needle diameter but it has a tapered neck without a clear indication of where it should be installed flush with the bottom of the piston. I did my best to set it right where the needle starts to taper and then was careful to set the other one with the same amount below the piston. Does anyone have a better way to set tapered needles?
Finally, any other tips to correct the lack of power? I really think it is carburation since the car had good power before the carb rebuild but have about tapped out my guesses.
Doug