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Old 02-25-2006, 01:13 AM
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maybe carb problems

I have a 327 small block in my 57 chevy . The block is a 68 and the heads are 62 double hump fuelie heads. I know it has a rv cam and a edelbrock dual quad manifold with two 600 cfm carbs. My problem is when I start the car cold it starts right up, but it kind of flutters at about 1500 rpm. It runs great at cruise speed and wide open throttle. After I shut it down and it sits for a few minutes it cranks over several times before it will start. I've adjusted the valves(hydraulic) put in new plugs, changed the cap and rotor, checked the compression, changed the fuel pump, took the carbs off, checked for proper float adjustment, took the carbs completed apart, cleaned, and reasembledthem. It also has a crane cams electronic module in the distributor. I've never had the heads off so I really can't tell you anything about the type of pistons or bottom end components that are in it. However it does run what I consider very strong. At one point in time it didn't have this problem. It's not what I consider a big problem but it is annoying. It doesn't smoke out of the exhaust, but the inside of the tailpipes are black in collar, and the gas milage is down about 3 to 4 miles per gallon. Do you think I have to much carburation on this? Would appreciate any help I can get on this. Thanks a lot. classof 57

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Old 02-25-2006, 10:50 AM
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I don`t think your over carbed, I know your over carbed. 1200 CFM total on a mild 327 says over carbed. If it were me I would replace it with a single quad dual plane intake and one of the eddy carbs your running. but if you want to keep the dual quads, I would go with something considerably smaller and have them tuned for the purpose.
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Old 02-25-2006, 12:48 PM
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as double vision posted you are 100%+ over carbed for the cubes and cam

swap to 525-575cfm carb and high rise intake for the rv cam

or ???? go find a dyno shop and ask them to do the best they can do to tune it as it is......almost (?) a no chance for you to find the best combo of timing/carb/cam with those parts
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Old 02-25-2006, 01:25 PM
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carb problem

thanks to all for the recommendations to lessen the carburetionon my car. I would still like to keep the dual quad setup, so i'll try to go to the smaller carbs. I'm not a street racer, but I really like the old school look, as my first 57 back in 1962 had a dual quad set up and I've always liked that look.
Thanks to all, and I'll let you know how it all works out. Now all I have to do is save up the 500 dollars or so to get the new carbs.
classof57.
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