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Thread: Dual Pumps in tank???
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02-10-2010, 06:41 PM #1
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
Dual Pumps in tank???
First of all, is it possible to do two pumps in the stock tank??? Secondly, What would be invlolved,
and lastly, is it possible to run a walbro 255 in conjuction with the stocker??
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02-10-2010, 07:27 PM #2
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Phantom Black Metallic- 2004 GTO M6
GMHTP has had write ups of cars using dual Walbros in the tank. I dunno what exactly you have to do. I think the twin pumps take up the space of the factory single unit. Keeps the motor from leaning out/blowin up from fuel starvation. Pretty snazzy setup IMO. But I dunno if it would be wise to run a Walbro as a "helper" pump. Someone will add more info as this thread goes along.
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02-10-2010, 10:03 PM #3
Subscrbed....
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02-11-2010, 02:29 AM #4
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Why? I run a serious 408 Stroker.....have a Walboro 255 and never see under 60lbs of fuel pressure even at WOT.
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02-11-2010, 04:03 AM #5
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
y?
Well, I dont know why, lol. maybe just to do it, or was just curious if possible. Im converting to e85 with my turbo build and will be around 500whp. so i have no idea what the 255 is good for on the corn juice. and i was thinking more like the walbro is the main pump and the stocker would be the helper.
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02-11-2010, 06:02 AM #6
If your main pump puts out more psi. than the stocker then the stocker is'nt going to help the new pump. More likely it would serve to choke the main pump off and one of the pumps prolly won't last long in a in-line comfig (if that's what you mean). Could be more trouble than it's worth. I'd just get a good single pump and go from there..
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02-11-2010, 07:17 AM #7
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
the thought was to "T" them together in the bucket. like how Fbodies do it. I could be way off base here, but if they were "t" together, their pressures would stack?
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02-11-2010, 07:24 AM #8
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
i think the single walbro would be more then enough for 500whp on the corn juice. But i like the added insurance. Makes me feel all warm and fuzzy inside.
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02-11-2010, 07:24 AM #9
I imagine they might if the 2 pumps produce equal pressure. I would surmise, that if one was producing less presure the other may serve to "stall" the weaker pump and cook it.. I'm sertainly no expert, but I have worked with many different makes of pumps (usually not automotive) hydro statics ect.ect.
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02-11-2010, 07:58 AM #10
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
i agree, i work in the feild of geothermal, i deal with system design based on flow and feet of head all day long. but i do it in a closed circuit where the water is returning to be pumped again. So not only do the pumps have to achieve a certain GPM, but they have to do it at a certain ft/hd. but this is different to me since the pumps will be pulling from an open source without pressure.
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02-13-2010, 12:57 PM #11
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02-15-2010, 11:11 AM #12
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02-15-2010, 02:05 PM #13
you should talk to qwkgto on here.....he either does or has ran twins in the tank I believe.
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03-05-2010, 03:43 AM #14
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03-05-2010, 03:53 AM #15
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Phantom Black Metalic- 2005 GTO
yes and its easier to heat the fuel up,I have experimented with all kinds of setups,and found the best way to do this in a FI car,I had the twin intank 255s they did alright up too around 850 rwh after that I was having problems,I now run a stock intake pump and a Weldon 95 psi pump as a secondary, and a sumped tank I built..also going to add a MSD boost a pump to the second pump this makes it have 23 volts under full boost,saves a guy from going exoctic on the injectors. I have for example ,80 lb injectors last year my car was saying that the injector duty cycle was 125-135 no way that was right,with those INJ. should be good for 1350 HP. so the boost a pump should do the trick, MSD has the new adjustable Boost pump.IT uses a laptop,ill let you know how it works out soon as this damn snow is gone here in OHIO.
I have a twin 255 setup in a bucket all wired and ready,im sure with the boost a pump it will work just as well,ill make u a deal if your interested.
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03-05-2010, 03:57 AM #16
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03-05-2010, 04:13 AM #17
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PBM 366ci TC78 E85- 2004 Pontiac GTO PBM A4
thanks quick
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03-05-2010, 11:13 AM #18
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Phantom Black Metalic- 2005 GTO
here is a shot of my setup from the trunk
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03-05-2010, 03:29 PM #19
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I do not know why you dont just put a Kenne Bell BaP on there and call it a day....mine has performed excellent for over 4 years now....
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03-05-2010, 06:41 PM #20
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Phantom Black Metalic- 2005 GTO
I am putting one on as well,MSD boost a pump that way I wont run out of fuel with those 80lbers.
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