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Old 10-02-2005, 07:09 PM
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curious about supply and return lines for fuel injection

I'm going to be converting a carbureted motor over to injection, but I was curious about something.

I read from an article in Carcarft.com about installing a ramjet fuel injection, that it is better to run a smaller supply line ( -6 ) and then run a larger return line ( -8 ).

Has anyone ever heard this before? Because people I now that have fuel injected motors all told me to run -8 supply and -6 return lines.

Please let me know, any information is helpful.

Thanks

Dan.

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Old 10-02-2005, 07:23 PM
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[QUOTE=novadan]I'm going to be converting a carbureted motor over to injection, but I was curious about something.

I read from an article in Carcarft.com about installing a ramjet fuel injection, that it is better to run a smaller supply line ( -6 ) and then run a larger return line ( -8 ).

Has anyone ever heard this before? Because people I now that have fuel injected motors all told me to run -8 supply and -6 return lines.

Please let me know, any information is helpful.

Thanks

Dan.[/QUOTE the return line is usually(should be) the smaller of the two!

Last edited by ronb; 10-02-2005 at 07:50 PM.
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Old 10-02-2005, 07:48 PM
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Just remember the supply line has to provide enough flow for full-throttle, max-power. The return line is simply a bypass to bleed excess fuel back to the tank.
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