Tweet
Are these early 57 Fuel Injection Corvettes EASY to keep the engine tuned-up and running good? Or the dual carburetors easier to keep the Corvette running good? Is there a difference in performance between the two set-ups?
Thanks
Thanks
-
-
Re: 57 Fuel Injection
When you say early do you mean the 7014360 unit.If so the answer is no they are not easy to keep running and are a POC. The '4520 unit is somewhat better but the first good 57 unit was the '4800 unit. The '4800 unit got Rochester Products and Chevrolet out of hot water as it was much more reliable than the previous two. In fact it ended up being a service replacement unit. The later '57 unit is the '4960 and it's identical to the '4800 except for numbers and nozzles. It's also an excellent unit except the nozzles are too big for a little 283. Put a set of the smaller nozzles in a '4960 unit and it's tamed down. There was also one more '57-58 unit and that is the '4800R unit. Not correct for any '57Corvette but some were used up on the early '58 Corvettes.
Actually it was the best '57 style unit made as far as operation goes. Problem is that there are hardly two made alike. It's a bastardized unit made up of left over castings.
Stay away from the first unit and the others aren't that bad with proper maintenance and a knowledge of what makes it tick.As far as EASY. Answer is NO.
I personally have said for years though that a fuel injection owner should be able to understand the theory of operation and have the mechanical ability to make some minor repairs himself. But few do and end up really screwing the thing up as a little knowledge is a dangerous thing. JD -
Re: 57 Fuel Injection
I agree with John. My 4800 (906 distributor) has been problem free for over 15 years. The only thing needing attention has been to replace leaky vacuum hoses. My vehicle is not driven a lot but that should speak for the reliability of the 4800.Comment
Comment