fuel pressure drop
after I turned up my pump ( ve )I noticed the truck would fall flat on upper end during wot. so I put in a fuel pressure gauge and found that it dropped to ( 0 ) psi so I put in a low pressure piston pump and I replaced the fuel line with a 1/2 inch pickup tube and 1/2 inch line all the way to the l/p ( I was there may as well do it right). I was expecting good things. come to find out it still dropped to ( 3 ) psi, better, but not good.
My question is, should this l/p be doing a better job than that, or is there something else wrong. thanks for any input shane |
OK...... does anybody else run the low pressure piston pump and have had this problem with these mods. am I expecting too much from this pump???
thanks shane :humm: |
I can pull mine down to 3 as well. 6x16's tuned to 300 horses. I have all stock fuel lines.
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doesn't that mess with your timing? I thought any thing under 8 psi was hard on things.
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A stock diaphram style is lucky to have 5 psi max. My stock one had 3 to 4 psi tops after the filter.
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Yep, your pressures are ok, not ideal but about all you can ask for. Try a little timing bump to get some top end back. 1/8" should do it.
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I did bump it up abought an 1/8. I have been reading some old threads on the dynamic timing spacer, although i havent decided what to do yet. thanks for the info.I guess I wont expect much more from my l/p.:argh:
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in my opinion the only way to go is a proper electric fuel pump thats designed for 1/2" + fuel lines!!
my pumps is a carter performance series it puts out 18psi at the pump and i can pull it down to about 15psi at full throttle!! i noticed a big gain in the top end!! |
do you have some numbers off of the pump by chance?? I am considering this route. thanks :humm:
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