dual kennedy pumps - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Performance Parts Discussion Discussion of Performance Parts For the 01-04 LB7 Duramax Trucks No Advertising

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post #1 of 59 (permalink) Old 12-30-2012, 06:23 PM Thread Starter
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dual kennedy pumps

i have one of the kennedy pumps right now, thinking about adding two. Would it make to much pressure that it would start to surge at idle? Still kinda undecided if i need it or not because it should make around 150-160gph @ about 4 psi with just one pump. Could use anyone's input with first hand experience on these.

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post #2 of 59 (permalink) Old 12-30-2012, 06:31 PM
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Pumps create flow, restriction creates pressure

I have dual Kennedy/TTS pumps and they make 8-10psi. Never surges.

Had a set on my LBZ for 4 years, and my LB7 is going on almost 2 years. Never once a problem, I love them.
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post #3 of 59 (permalink) Old 12-31-2012, 07:56 AM Thread Starter
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alright that helps me out. wasnt sure what it would do. ill order one up!

2003 Medium Green Metallic CC/SB LB7 Duramax
EFI Live With DSP5 | Autometer EGT, Fuel, Boost | LED Dash | MBRP 4" Straight Pipe Exhaust
LML Exhaust Manifold | Diamond Eye Downpipe | PPE Boost Valve | Fass 150 Titanium Pump
Tuff Country 4" Lift | Black And Machined 17" Eagle 197's On 285/70/17 AT3s | Custom Traction Bars
Rare Parts Tie Rods | Custom Steering Brace | Bills Custom AEM Intake | ProEFX Cowl Hood
High Idle Mod | High's/Low's/Fog's All On Mod | DDM 5000k HID's | Debadged | Tinted Lights | 5% Windows
Wishing For A Built Trans!
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post #4 of 59 (permalink) Old 12-31-2012, 11:53 AM
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In my opinion one pump is enough unless you are planning on a big built motor. But you could always run two and add a regulator if needed. Two is also nice for redundancy in case one goes out.

Also the statement above is incorrect. The pump creates the flow and pressure. Restriction causes a loss of pressure.

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post #5 of 59 (permalink) Old 12-31-2012, 12:09 PM
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Actually, 2 pumps are fine for a stock engine. Ive ran them for almost 6 years.

No regulator needed as the TTS pumps are on-demand pumps.
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post #6 of 59 (permalink) Old 12-31-2012, 12:31 PM Thread Starter
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well i was thinking about just adding another since its not a ridiculous amount of money and would help over come dual filters and keep the cp3 feed with pressure at all times. i dont have a fuel pressure gauge to let me know how its working which kinda sucks for me.

2003 Medium Green Metallic CC/SB LB7 Duramax
EFI Live With DSP5 | Autometer EGT, Fuel, Boost | LED Dash | MBRP 4" Straight Pipe Exhaust
LML Exhaust Manifold | Diamond Eye Downpipe | PPE Boost Valve | Fass 150 Titanium Pump
Tuff Country 4" Lift | Black And Machined 17" Eagle 197's On 285/70/17 AT3s | Custom Traction Bars
Rare Parts Tie Rods | Custom Steering Brace | Bills Custom AEM Intake | ProEFX Cowl Hood
High Idle Mod | High's/Low's/Fog's All On Mod | DDM 5000k HID's | Debadged | Tinted Lights | 5% Windows
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post #7 of 59 (permalink) Old 12-31-2012, 12:32 PM
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Quote:
Originally Posted by 784x4chev View Post
Also the statement above is incorrect. The pump creates the flow and pressure. Restriction causes a loss of pressure.
Explain yourself o knowledgeable one!

If you have your pump running, and pinch the line...is the pressure between the pump and pinch point going to rise or lower?

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post #8 of 59 (permalink) Old 12-31-2012, 12:33 PM
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Glowshift has a electric fuel pressure gauge that is like 60 bucks. Can run the sending unit to the bleeder screw on the fuel filter housing and put the gauge in your pod.
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post #9 of 59 (permalink) Old 12-31-2012, 12:35 PM
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Quote:
Originally Posted by 784x4chev View Post

Also the statement above is incorrect. The pump creates the flow and pressure. Restriction causes a loss of pressure.


Like I said, pumps create FLOW. RESTRICTION creates PRESSURE.



Ill put it into Laymans terms...


Turn on your garden hose at wide open, now squeeze the hose to RESTRICT the FLOW. Now you get PRESSURE.



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post #10 of 59 (permalink) Old 12-31-2012, 12:36 PM
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Pumps create flow, a restriction creates pressure!


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