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C7JE cylinder heads

March 19 2018 at 9:33 PM
Paul  (no login)

Response to Heads

Hey good for you, those are pretty darn good heads. Congratulations also for getting the motor torn down and seeing things are looking good.

As far as the springs are concerned, I don't know right off the top of my head but they would most likely be stock automotive 352 and 390 springs, but those would be from hydraulic motors so we better check on that. There need not be a lot of spring pressure because the cam is not much of a popper and the lift is not that high, and the rpm range is not all that much either. If you are in there and the piece is on the bench, I would go ahead and replace all the springs. It would appear to be cheap insurance.

The marine Edelbrock carb is a 600, and the original Carter was 625 cfm. If you have a 650 better check to see if it's marine, which is a big safety feature on a motor that could drip gas somewhere other than a parking lot. The Edelbrock Performer RPM will work great on your motor, especially since it's not trying to push a cruiser. As always, when the motor is done and properly broken in, be real sure to read the plugs after a SHORT RUN to be sure you're not overheating things and getting ready to melt pistons due to a lean mix with that combination.


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