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increasing fuel line size

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Old Sep 17, 2012 | 01:40 PM
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Default increasing fuel line size
Has anyone ever increased a C3 fuel line size without raising the body? If so, would you please describe the method you used, including do's and do not's? I understand it is a difficult job. I need to increase my stock 1980 size to feed a performance 406.
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Old Sep 18, 2012 | 04:35 PM
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Why do you think the stock 3/8" line isnt sufficient for a 406 ?
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Old Sep 18, 2012 | 05:05 PM
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Originally Posted by MelWff
Why do you think the stock 3/8" line isnt sufficient for a 406 ?
3/8" will handle up to about 400-450fwhp
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Old Sep 18, 2012 | 05:12 PM
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Hmm. Do you need a return? Could you tee off before the hard line, use both lines to feed fuel, then recombine them at the engine?
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Old Sep 18, 2012 | 07:46 PM
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I've been led to believe by articles in the Vette and Corvette Fever magazines that the stock size is smaller than 3/8".
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Old Sep 18, 2012 | 08:10 PM
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Stock fuel line size is 3/8- regardless of which engine was in the car when delivered. Even the HP big blocks had 3/8 line.
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Old Sep 18, 2012 | 09:14 PM
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OK. I won't worry about keeping what's there now, but I'd like to measure the inside diameter after I disconnect the hose in the engine compartment.
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Old Sep 23, 2012 | 11:46 AM
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Default Increasing Fuel Line Size
I measured the fuel line size. The OD is 0.375 inch. With 0.028 inch wall thickness, the ID is 0.0319, or about 5/16 inch.
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