Damien Runs but with issues..help needed
02-25-2008, 12:46 AM
#21
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Originally Posted by 2000SilverBullet
That'* the point to beefing up the wiring. The pump draws more power. The wiring is not large enough. The voltage drops and the pump runs at a lower pressure. The heavier wiring promotes a higher voltage......as much as 1.5 volts....so the pump will run faster and produce more pressure and flow..
Originally Posted by SSEimatt93
If i was to update the wiring, it would be custom..and do-able.
Like i says though..Ive got some scanning and mechanical testing to do
Like i says though..Ive got some scanning and mechanical testing to do
Ed
02-25-2008, 12:52 AM
#23
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My fuel pump is capable of nearly 60psi with the Walbro on stock wiring, and my wires don't get warm. 
But then again, the stock Series 1 L67 fuel pump outflows the S2 L67 fuel pump, so I may have larger wiring to begin with.
But then again, the stock Series 1 L67 fuel pump outflows the S2 L67 fuel pump, so I may have larger wiring to begin with.
02-25-2008, 01:07 AM
#24
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Originally Posted by willwren
But then again, the stock Series 1 L67 fuel pump outflows the S2 L67 fuel pump, so I may have larger wiring to begin with.
That blower looks nice. Good luck with your build.
02-25-2008, 01:27 AM
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It’* a known fact that a weak link in tuning your supercharged 3800 is the inadequate fuel pump wiring system. When you install a higher capacity fuel pump, you place a greater demand on the wiring to the pump. Voltage drop in excess of 2 volts has been observed due to the factory'* wiring being unable to pass sufficient current to the pump. This plug-and-play kit remedies this problem by supplying a larger gauge wire to the pump. NO WIRES TO CUT! Includes SEALED relay, SEALED fuse holder and all OEM style wiring and connectors. THOUSANDS of these style "HotWire" kits have been sold to the Grand National market with great success! Now they are available for the 3800!
02-25-2008, 07:05 AM
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I don't see the claimed 2V+ drop occurring in normal conditions. How tiny can stock fuel pump wiring be? Who can post the gauge? We can once and for all figure this out.
02-25-2008, 07:42 AM
#27
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I saw a voltage drop on mine when I did my pump. Damn near a full volt if memory serves me. The wiring and new relay are the next on the list for upgrades, after I get my PCM sorted out.
02-25-2008, 07:56 AM
#28
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Originally Posted by 1994se
Originally Posted by willwren
But then again, the stock Series 1 L67 fuel pump outflows the S2 L67 fuel pump, so I may have larger wiring to begin with.
That blower looks nice. Good luck with your build.
02-25-2008, 10:00 AM
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The new Walbro 255 lpm unit that Intense sent me with the wiring kit was physically smaller than my OEM pump.
It'* a positive displacement pump so output is directly proportional to rpm which is proportional to supply voltage.
I wondered if the claimed capacity or flow increase is due to it not having the 1/8" bypass for the bucket syphon.
Anyone know what the stock pump is rated at :?:
I believe the pressures should be very similar between 40 to 60 psi. and the flows should be a bit more for the Series 2 but not much.
It'* a positive displacement pump so output is directly proportional to rpm which is proportional to supply voltage.
I wondered if the claimed capacity or flow increase is due to it not having the 1/8" bypass for the bucket syphon.
Anyone know what the stock pump is rated at :?:
I believe the pressures should be very similar between 40 to 60 psi. and the flows should be a bit more for the Series 2 but not much.
02-25-2008, 10:04 AM
#30
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For the L67'*, the flow is in favor of the S1, not the S2. We never quite figured out why, but DrJay and I both found flow data on them about 3 or 4 years ago. And on different sites that confirmed each other.