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Old 03-09-2013, 08:15 PM
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350 engine glass bowl having vapor lock issue

my 350 engine edelbrock carb gas bowl is getting vapor lock what can cause this please help

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Old 03-09-2013, 10:14 PM
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Common for fuel filters to have an air pocket on the high side while in use. Doesn't affect operation.
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Old 03-09-2013, 10:22 PM
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Quote:
Originally Posted by liljoe1996miller@aol View Post
my 350 engine edelbrock carb gas bowl is getting vapor lock what can cause this please help
A true vapor lock is caused by the fuel flashing into a vapor in the fuel line, creating a blockage. If this is what you're experiencing, removing the fuel line from the heat source- either by relocating it or by using a shield to protect it- will keep vapor lock from happening.

If you're talking about the common problem of the aluminum Edelbrock carb boiling the fuel in the fuel bowl, using an insulating gasket or spacer can help.
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Old 03-09-2013, 11:21 PM
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I have had 2 engines do this. One had a holley 4150 with an performer RPM DP intake. It would get so hot, that the fuel in the bowls would boil, causing the car to be hard to start and load up at idle. I put an RPM air gap intake on it, and the problem was gone. The other was on my 388 with a 144 supercharger. The super charger made so much heat, that it would boil the fuel as well. It already had a nitrous plate, but I added a wood spacer. This help some, but is still an issue in the heat of the summer. I cant change the intake and keep the supercharger...

My suggestion would be to try a spacer first, either wood or plastic. If that doesnt work, you may have to try some sort of an air gap intake. Also make sure your fuel lines are as far from any heat sorce as possible.

Chevyguy13
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