255 fuel pump pressure drop on 408
07-11-2009, 09:59 AM
#21
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No. You have to add a 255 inline before the filter on the frame rail. It is a relatively easy install and you don't have to compromise your in-tank bucket (FWIW). I have never had fuel pressure drop up to 12 psi boost. I see 70 psi fuel pressure at 12 psi boost with the stock FPR on the rail. I red line at 5600 rpm.
I agree with Rick. Somewhere above 450 RWHP you will start to run out of injector on the 42# injectors.
OP:
Watch out for low fuel tank slosh. I am still having problems with it at 3/8 of a tank. It can kill a good time.
I agree with Rick. Somewhere above 450 RWHP you will start to run out of injector on the 42# injectors.
OP:
Watch out for low fuel tank slosh. I am still having problems with it at 3/8 of a tank. It can kill a good time.
07-11-2009, 10:08 AM
#22
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Your truck should have a return style system. Install a Magnavolt and a Walbro pusher inline pump also available from Magnacharger. That should be more than enough fuel for what you're doing.
07-11-2009, 10:12 AM
#23
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07-11-2009, 11:11 AM
#24
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I've got this Vortech fuel pump. Is it going to be good as inline fuel pump for the truck.
http://www.summitracing.com/parts/VOR-8F002-265/
http://www.summitracing.com/parts/VOR-8F002-265/
07-11-2009, 11:24 AM
#25
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Is the intank stock pump going to restrict the inline pump? If so, then what's the use of the inline pump?
https://ls1tech.com/forums/4538716-post5.html
https://ls1tech.com/forums/4538716-post5.html
Last edited by Denali08; 07-13-2009 at 04:01 AM.
07-11-2009, 11:28 AM
#26
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It looks like it will work fine but I have no experience with it and have not heard of anyone's experience with it. If it is marketed by Vortech it should do. It is about the same rated flow from what I can tell. Might even be a Walbro. If it is it is more money. 70gph x 3.785L/G = 265 LPH flow.
07-11-2009, 11:35 AM
#27
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Is the intake stock pump going to restrict the inline pump? If so, then what's the use of the inline pump?
https://ls1tech.com/forums/4538716-post5.html
https://ls1tech.com/forums/4538716-post5.html
07-12-2009, 02:50 PM
#28
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Is the intake stock pump going to restrict the inline pump? If so, then what's the use of the inline pump?
https://ls1tech.com/forums/4538716-post5.html
https://ls1tech.com/forums/4538716-post5.html
07-13-2009, 04:04 AM
#29
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Sorry, I mean "intank", corrected.
So, the stock pump will be enough flow wise. The inline will be needed just to backup the pressure drop, right?
What will happen if the stock intank fuel pump fails while the inline pump is there? Will fuel be restricted to the inline pump and cause a lean condition and engine damage??
Sorry for the hijack of the thread.
So, the stock pump will be enough flow wise. The inline will be needed just to backup the pressure drop, right?
What will happen if the stock intank fuel pump fails while the inline pump is there? Will fuel be restricted to the inline pump and cause a lean condition and engine damage??
Sorry for the hijack of the thread.
07-13-2009, 11:37 PM
#30
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The stock pump with the inline pump will supply fairly well to around 500RWHP. Over that it's recomended to have a 255 Walbro in the tank also.
If the intank fails the truck will barely run (had this happen to a friends truck). It will create a lean condition, but you'll know right away that there is a problem and that should tell you to keep your foot out of it.
If the intank fails the truck will barely run (had this happen to a friends truck). It will create a lean condition, but you'll know right away that there is a problem and that should tell you to keep your foot out of it.
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