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Old Mar 18, 2008 | 08:51 AM
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Default turbo fuel system questions

not sure where to put this. so if it needs to be moved have at it.

i have questions about dual pumps. i see where people put in two walbro's. well i only have one. but what would be wrong with installing it along with the stocker? the stocker seems to flow pretty well. i'm going return style. just wondering, thats all.
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Old Mar 18, 2008 | 04:57 PM
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Originally Posted by 4.8T
not sure where to put this. so if it needs to be moved have at it.

i have questions about dual pumps. i see where people put in two walbro's. well i only have one. but what would be wrong with installing it along with the stocker? the stocker seems to flow pretty well. i'm going return style. just wondering, thats all.
That would work, but your fuel would be more limited on the single pump. If you do a hobbes switch to control turning on the second pump, you'd be adding another 255lph when on. I believe the stocker is around 120ish lph? You just need to set the hobbes to come on almost immediately with boost (like at 2psi), which may end up cycling that pump on and off a lot.

Honestly, though, if you are pulling the tank anyway... save up another 300 clams and do two 255 pumps. Just to be on the safe side.
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Old Mar 18, 2008 | 06:52 PM
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would there be a problem runing two different flow rate pumps at the same time? as in would one fight the other? so far i've got 10psi on stock pump. with 10:1-11.7:1 afr.
just wondering
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Old Mar 18, 2008 | 10:54 PM
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Yeah, I ran my stock pump to 10psi as well, with meth. When I went to 12psi it couldn't hold the fp.

I don't think there would be any problems with the different rates. After thinking more, I believe my stock SSS pump was 170lph, and yours may be too.
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Old Mar 19, 2008 | 11:14 AM
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I just added and inline pump to mine which seems to be working well, I just think Im running out of injector.
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Old Mar 19, 2008 | 12:12 PM
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i don't think i'll have a problem with injectors. just fuel flow lol.
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Old Mar 19, 2008 | 01:53 PM
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what size inj. are you running? mine are 42's and they are in the mid 90's IDC
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Old Mar 19, 2008 | 02:03 PM
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60's more like 72's with our pressure. and they are at like 55-59% i think it was i'll have to look again. do you still have your maf?
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Old Mar 19, 2008 | 03:03 PM
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Originally Posted by WJ MARK
what size inj. are you running? mine are 42's and they are in the mid 90's IDC

My 42's are at 105% lol but I have a "fix" for that
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Old Mar 19, 2008 | 03:29 PM
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Originally Posted by kbracing96
My 42's are at 105% lol but I have a "fix" for that
Speaking of that....WTF? Did they work out? PM me and let me know. I dont wanna jack up 4.8T's thread.
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