Fuel Pump Answers!
Posting Guru
Joined: Mar 2011
Posts: 1,037
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From: Florida
Laughing Gas
Joined: Sep 2007
Posts: 1,051
Likes: 4
From: Caro, MI
Wow my mistake! I used the wrong chart! Tryin to provide good data and I do a dump mistake. My chart compares almost the exact same. Sorry. I grabbed data from the low flow pump that is its brother.
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I have graphs for the 044, the 392, and I have a comparison graph - plus the data to make my own. I need info on my stock pump, and there's only one way to get it - get a gauge and play with the pump.
Elevation: Water has a higher density than fuel, but the engineering data for water is a loss of 0.433 PSI per foot of elevation. So... if our pumps delivered water, we'd lose 0.87 PSI from the pump to the bowl. Hardly a value to fret over. The suction side of things is where we don't want a significant elevation change. A perfect pump with infinite power can suck water up a pipe about 33 feet at sea level and that's it.
I really appreciate all the feedback!
Elevation: Water has a higher density than fuel, but the engineering data for water is a loss of 0.433 PSI per foot of elevation. So... if our pumps delivered water, we'd lose 0.87 PSI from the pump to the bowl. Hardly a value to fret over. The suction side of things is where we don't want a significant elevation change. A perfect pump with infinite power can suck water up a pipe about 33 feet at sea level and that's it.
I really appreciate all the feedback!
Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
So I said the other day I said I installed my fuel pressure gauge. I finally was able to test it out today. I am running g 160ccto sticks, stock pump (no in tank mods or post tank for that matter) and Clays frx. In my econo which I believe is DPs 80e I hold just above 50the psi at wot. In my hottest tune it dropped below 50 before I had to let off at 80 mph
Posting Guru
Joined: Aug 2009
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From: ellensburg
Tugly,
I really cant wait to get this all in your rig on sunday. You're going to have a serious permagrin. Thought I'd let you know we will also be doing valve springs in two rigs, and an exhaust. Possibly if time allows a melling install on my rig. Should be a day full of shenanigans
I really cant wait to get this all in your rig on sunday. You're going to have a serious permagrin. Thought I'd let you know we will also be doing valve springs in two rigs, and an exhaust. Possibly if time allows a melling install on my rig. Should be a day full of shenanigans
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Ah... a bounty of busted knuckles. I'll bring the Band-Aids.
50 PSI at WOT on the 80e with the possibility of air in the line? Those are really good numbers! I just studied up on the uber details of split vs. stock and It made me wonder:
When you went from splits to singles, what nuances did you notice? Quieter or louder under power? Acceleration changes - stronger, weaker, later, earlier, more consistent?
50 PSI at WOT on the 80e with the possibility of air in the line? Those are really good numbers! I just studied up on the uber details of split vs. stock and It made me wonder:
When you went from splits to singles, what nuances did you notice? Quieter or louder under power? Acceleration changes - stronger, weaker, later, earlier, more consistent?
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
[QUOTE=Tugly;12320135]Ah... a bounty of busted knuckles. I'll bring the Band-Aids.
[FONT=Times New Roman]50 PSI at WOT on the 80e with the possibility of air in the line? Those are really good numbers! I just studied up on the uber details of split vs. stock and It made me wonder:[/FONTANELS]
When you went from splits to singles, what nuances did you notice? Quieter or louder under power? Acceleration changes - stronger, weaker, later, earlier, more consistent?[/
QUOTE]
It is definitely stronger but they are 30%a larger so that is to be expected. Don't notice that its any quieter or louder under power. All I hear is Turbo and exhaust. My idle is louder but as you know I am having problems with that.
[FONT=Times New Roman]50 PSI at WOT on the 80e with the possibility of air in the line? Those are really good numbers! I just studied up on the uber details of split vs. stock and It made me wonder:[/FONTANELS]
When you went from splits to singles, what nuances did you notice? Quieter or louder under power? Acceleration changes - stronger, weaker, later, earlier, more consistent?[/
QUOTE]
It is definitely stronger but they are 30%a larger so that is to be expected. Don't notice that its any quieter or louder under power. All I hear is Turbo and exhaust. My idle is louder but as you know I am having problems with that.
Posting Guru
Joined: Aug 2009
Posts: 1,025
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From: ellensburg
Rich,
I know when I went to my hybrids, I noticed a bit of a more pronounced idle and light throttle. Under load, or hard throttle it sounds the same. When I say pronounced, I'd say the best way to characterize it is the cackle is louder, but its more of a snapping not cackle.
See ya tomorrow buddy, take care driving past the fire. Keep your fingers crossed for the wind to be up so that we can enjoy some clean(er) air.
I know when I went to my hybrids, I noticed a bit of a more pronounced idle and light throttle. Under load, or hard throttle it sounds the same. When I say pronounced, I'd say the best way to characterize it is the cackle is louder, but its more of a snapping not cackle.
See ya tomorrow buddy, take care driving past the fire. Keep your fingers crossed for the wind to be up so that we can enjoy some clean(er) air.
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Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Thanks to ChowderDownUnder, I found a link to a dead horse and I think I'll beat on it for a while.
Flow test on new pump:
0 PSI 60 GPH
60 PSI 31.58gph
70 PSI 30.93gph<!--color-->
My original hypothesis was 33 GPH at 45 PSI and I'm going to stick with that. This just so happens to be the fuel demand of AC160s if the tune drains them completely per cycle (race tune).
I will start my drive to 2000ca250's house in a few hours... new injectors and turbo get the back seat. I have to go the long way around because the mountain pass between us keeps closing, due to fire. Just to be safe with my injectors, I will run in stock tune until I get my fuel pressure gauge or a new pump. I have plenty of data I want to collect in stock tune, so this is no real inconvenience. I won't have numbers in the fun tunes until I'm sure my old pump is still good or I replace it. I know eyes will roll, but my twelve-year-old pump has sucked a lot of air and I don't trust it. Clay's getting an order real soon.
Flow test on new pump:
0 PSI 60 GPH
60 PSI 31.58gph
70 PSI 30.93gph<!--color-->
My original hypothesis was 33 GPH at 45 PSI and I'm going to stick with that. This just so happens to be the fuel demand of AC160s if the tune drains them completely per cycle (race tune).
I will start my drive to 2000ca250's house in a few hours... new injectors and turbo get the back seat. I have to go the long way around because the mountain pass between us keeps closing, due to fire. Just to be safe with my injectors, I will run in stock tune until I get my fuel pressure gauge or a new pump. I have plenty of data I want to collect in stock tune, so this is no real inconvenience. I won't have numbers in the fun tunes until I'm sure my old pump is still good or I replace it. I know eyes will roll, but my twelve-year-old pump has sucked a lot of air and I don't trust it. Clay's getting an order real soon.
Elder User
Joined: Dec 2002
Posts: 797
Likes: 1
From: UT
This is great knowledge for the guy pushing the limits a little further like myself. I'm ok with buying a HO pump to support it fully. The Fuelabs pump or 044 looks to suit the bill. How many amps does the FL 41404 pull @ 60% setup?
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Last time I will post in here...
You do NOT need a fuel lab, Air dog, Fass or any other crap.
For a bunch of guys that talk about KISS all the time, you sure are dead set on making things difficult.
STOCK PUMP WILL DO FINE... WALBRO will do fine.
You do NOT need a fuel lab, Air dog, Fass or any other crap.
For a bunch of guys that talk about KISS all the time, you sure are dead set on making things difficult.
STOCK PUMP WILL DO FINE... WALBRO will do fine.
Cargo Master
Joined: May 2002
Posts: 2,530
Likes: 7
From: Montana
This is true, however the named pumps above work pretty damn good.