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Old 01-18-2012, 12:58 PM
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wet spark plugs

I have a 400 chevrolet small block with vortec heads steam holes have been drilled and a 750 edelbrock carbuerator, spark plugs keep getting wet, is this to much carbuerator for the engine?


Last edited by rmcclain2974; 01-18-2012 at 01:14 PM.
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Old 01-18-2012, 01:24 PM
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I don't think so. 750s are usually right on home on 400's. However there are things that can cause this condition. Float level too high, fuel pressure too high, trash in the needle and seat causing a flooding condition. Butterflies off the idle circuits due to spark timing advance being too low. This can also be caused by a weak ignition system. Most carbs don't like over 5 psi fuel pressure. When is this occuring, at cruise? Idle?
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Old 01-19-2012, 07:58 AM
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Wet Plugs

Is it possible that I need a better set of plugs, I am using Autolite Copper Core Resistor Spark Plugs.
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Old 01-19-2012, 10:08 AM
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DoubleVision has listed 2 of the problems that I would have thought about first, float set too high or fuel pressure too high.
Set the float according to the instructions in the Owner's Manual, shown in a link at the bottom of this post. Then tee off at the carb inlet, running a copper line back to the firewall and up past the lip of the hood to the cowl. Temporarily mount a mechanical 0-15 psi, liquid-filled fuel pressure gauge on the cowl using duct tape or tie wraps or whatever, so that you can monitor the fuel pressure through the windshield while you drive. If you see over 6 psi pressure, replace the fuel pump with this Carter muscle car pump and monitor pressure....
frequently asked questions...
Owner's Manual...click on the link in the site above. My computer has some worms in it and will not let me link it.
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