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 Post Posted: Mon May 21, 2012 8:57 pm 
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Joined: Tue Apr 01, 2008 10:56 pm
Posts: 110
Location: Kilgore Tx [North East Tx]
Racers,

With my APD belt drive fuel pump and bypass regulator the idle fuel pressure "bounces" between 1 - 3 pounds at about 1200 RPM. Increasing RPM to about 1800 - 2000 results in steady, as set pressure. Will a smaller idle jet in the regulator steady the low RPM pressure?

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Larry Woodfin, builder of Kinetic Art.


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 Post Posted: Mon May 21, 2012 10:01 pm 
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Joined: Tue Apr 18, 2006 6:38 am
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Location: Coming At Ya!
I don't run a bypass regulator but I do run a belt drive setup and my fuel pressure will fluctuate at idle also in the 2psig range +/-. You have to understand that fuel delivery/pressure in a belt drive system is RPM dependent and RPM at idle is NOT constant. As long as the down track fuel pressure is OK I wouldn't concern myself with what it's doing at idle as long as there's enough delivery to keep the fuel bowls full.

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Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.

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