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I have a 1957 283-250hp Corvette that fouls plugs due to the choke staying on too long and running to rich when it's on. I can start the car 6-7 times but then it's time to pull the plugs. Any suggestion's ?
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Re: 1957 fuel injection
Bob, what conditions are you starting/driving the car under? The early FI units have a vacuum bypass in them, so that the enrichment diaghram runs on full rich until the electric choke has opened up. In college I ran one of these units driving from where we lived to school-1.3 miles one way. About four days of this would trash a set of plugs to the point where the engine would not clean out & run to redline without new plugs. If you're showing & thus trailering, it's even worse. Some things that can be done to "cheat" this situation (which is normal, for car's "short hopped" by the way) include the following:
A: Hotter Spark plugs with extended tips-AC-46S or equiv.
B: Adjust the choke to a leaner condition
C: Adjust the rich stop on the fuelmeter to a more lean condition
D: Make sure the choke wire is connected to the "high" side of the
ballast resistor (not the side the Dist. connects to)
These may help some, otherwise, notheing beats a full warmup to operating temperature, about a 10-15 mile drive at road speed. I hope this helps. -
Re: 1957 fuel injection
Bob, what conditions are you starting/driving the car under? The early FI units have a vacuum bypass in them, so that the enrichment diaghram runs on full rich until the electric choke has opened up. In college I ran one of these units driving from where we lived to school-1.3 miles one way. About four days of this would trash a set of plugs to the point where the engine would not clean out & run to redline without new plugs. If you're showing & thus trailering, it's even worse. Some things that can be done to "cheat" this situation (which is normal, for car's "short hopped" by the way) include the following:
A: Hotter Spark plugs with extended tips-AC-46S or equiv.
B: Adjust the choke to a leaner condition
C: Adjust the rich stop on the fuelmeter to a more lean condition
D: Make sure the choke wire is connected to the "high" side of the
ballast resistor (not the side the Dist. connects to)
These may help some, otherwise, notheing beats a full warmup to operating temperature, about a 10-15 mile drive at road speed. I hope this helps.Comment
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Re: 1957 fuel injection
Bill, Thanks very much for your response.I will get right on it.Comment
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Re: 1957 fuel injection
Bill, Thanks very much for your response.I will get right on it.Comment
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