Joined
·
437 Posts
I have written about my 4300 before here, and have read threads about carburators as well. What I am asking for and perhaps the answer is not a simple "this carb" or "that carb" answer.
The skinny-----I have a 1969 XR7 vert. 4 speed close ratio 3.00 open rear S code with a Autolite 4300 4v carb. The car was purchased in early June of this year. It is a numbers matching cougar. It starts right up, and had a gas smell under the hood and thru the exhaust like it was running a little rich. I also have a slight leak at the accelerator pump area. I have done quite a few things to her in the past 3 months. The things done that are affecting my thread here, regarding my desire to switch the carb are the following.
I have changed the spark plugs, ignition wires, put in Pertronics ignition, air filter, switched out the accelerator pump and of course a new gasket. There was a slight hesitation on acceleration that made me feel the accel pump needed to be changed. So here I am, wishing to keep her numbers matching regarding my Autolite 4300, but I am realizing that these carbs were junk even when new. She now starst fine, but once warm idles rough and will stall out. I have not had a car in 20+ years that had a carb and even then never really fooled around with carburators. I see that there are two screws on the bottom front of the carb and these adjust the air and fuel, I believe. I feel that since all the work I have done the carb needs to be adjusted for the new plugs, wires accel pump, etc. The leak BTW is still there by the accel pump. In talking to numerous people, (my brother in law for one whom is a shop foreman at a Ford dealership in NY) the recommendation is to swap out the carb. The issue I have is which one. There are quite a few out there. Edelbrock is what my brother in law is suggesting. The CFM I believe should be around 600 tops. Not sure. Vacuum secondaries as well? Which one/model will swap out the best for doing the least amount of manufacturing to make it fit on the motor?
My question is:
Is there a carb out there that is a pretty easy swap for my cougar? I don't want to race her, just want her to start reliably, run smooth and strong that I know she is able to do.
Any help/recommendations are appreciated. Thank you in advance.
Bill
The skinny-----I have a 1969 XR7 vert. 4 speed close ratio 3.00 open rear S code with a Autolite 4300 4v carb. The car was purchased in early June of this year. It is a numbers matching cougar. It starts right up, and had a gas smell under the hood and thru the exhaust like it was running a little rich. I also have a slight leak at the accelerator pump area. I have done quite a few things to her in the past 3 months. The things done that are affecting my thread here, regarding my desire to switch the carb are the following.
I have changed the spark plugs, ignition wires, put in Pertronics ignition, air filter, switched out the accelerator pump and of course a new gasket. There was a slight hesitation on acceleration that made me feel the accel pump needed to be changed. So here I am, wishing to keep her numbers matching regarding my Autolite 4300, but I am realizing that these carbs were junk even when new. She now starst fine, but once warm idles rough and will stall out. I have not had a car in 20+ years that had a carb and even then never really fooled around with carburators. I see that there are two screws on the bottom front of the carb and these adjust the air and fuel, I believe. I feel that since all the work I have done the carb needs to be adjusted for the new plugs, wires accel pump, etc. The leak BTW is still there by the accel pump. In talking to numerous people, (my brother in law for one whom is a shop foreman at a Ford dealership in NY) the recommendation is to swap out the carb. The issue I have is which one. There are quite a few out there. Edelbrock is what my brother in law is suggesting. The CFM I believe should be around 600 tops. Not sure. Vacuum secondaries as well? Which one/model will swap out the best for doing the least amount of manufacturing to make it fit on the motor?
My question is:
Is there a carb out there that is a pretty easy swap for my cougar? I don't want to race her, just want her to start reliably, run smooth and strong that I know she is able to do.
Any help/recommendations are appreciated. Thank you in advance.
Bill