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dual pumps stock rail and regulator question

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Old 02-21-17, 06:28 AM
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mmac0405
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Default dual pumps stock rail and regulator question

bought sc with this setup its dual walbros intank to stock fuel rail but has return and all -6 lines so the relay setup running the pumps was pretty ghetto so i ordered new relays from painless.my question is i disconnected one of the pumps and the car was running lean on the wideband it was idling funny and was getting to about 212 degrees water temp. but was hitting about 13lbs of boost now i hooked up second pump afr are alittle rich car is running alot better but only hitting 6lbs of boost the setup is 2jzgte auto gt4088. stock injectors stock fuel rail stock aristo ecu no piggy back i bought the car like this, i do not even no why there is two pumps, only thing i can think of is **** voltage it is set up with power wire for the relays straight to alternator which i ran new 10 gauge to my battery just waiting on the relays to come in? any suggestions and has anyone ever had dual pumps on stock rail and computer ?
Old 02-21-17, 11:46 AM
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gerrb
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what model of walbros are they ? how are they wired .... individual relay per pump or they are both on at the same time using one relay ?
Old 02-21-17, 11:57 AM
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mmac0405
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i just pulled them out this is what im dealing with! aeromotive 340s wiring looks horrible do not know where to even start and i just picked up brand new aeromotive today lol


Old 02-21-17, 12:30 PM
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GTX580
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Ya definitely the wiring man. Either redo them or get a single Walbro 450 E85 and call it a day...

Or get this bracket from racetronix...

http://www.racetronix.biz/itemdesc.a...PA-510&eq=&Tp=
Old 02-21-17, 12:41 PM
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mmac0405
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im only looking to make 600 650hp i have brand new single aero not a big fan of walbro, im really not sure what to do at this point but i know that dual setup with be nice if i go e85



Old 02-21-17, 12:42 PM
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Originally Posted by gerrb
what model of walbros are they ? how are they wired .... individual relay per pump or they are both on at the same time using one relay ?

individual relays
Old 02-21-17, 03:10 PM
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im assuming pumps are in line each other thats why i was getting lean when only one pump has power.... the circle with question mark is stock feed? the set up has me alittle confused im new to the dual fuel pump world thats why there is so many pics. thanks any help would be appreciated
Old 02-21-17, 03:13 PM
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mmac0405
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Originally Posted by ross3857
Ya definitely the wiring man. Either redo them or get a single Walbro 450 E85 and call it a day...

Or get this bracket from racetronix...

http://www.racetronix.biz/itemdesc.a...PA-510&eq=&Tp=

what is this?



Old 02-21-17, 08:48 PM
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Originally Posted by mmac0405
what is this?

thats for stablizering the voltage to the stock pump.
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