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Fuel: Parallel vs. Series

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Old 04-27-14, 04:55 PM
  #26  
F**K THE SYSTEM!!

 
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wired... hah. Fuel lines are ran in series.(like factory)
Old 05-05-14, 02:02 PM
  #27  
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Originally Posted by WANKfactor
Any conceivable problems with this before i start ordering fittings? Thanks in advance.
I'm no expert, but that drawing looks like it's just begging for trouble.. I may (likely) be wrong, but it looks to me like the Primary rail is going to see a majority of the fuel, and the secondary is going to get less than it needs/wants.


If your lines are -6, but your rail is -8, why not just get a male/male fitting with -8 threads on one side, and -6 threads on the other?
Old 05-05-14, 03:00 PM
  #28  
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Originally Posted by junito1
I have mine wired in series. Could this be the reason my afrs lean a bit when my secondaries kick in? I can see in the log, when duty cycles drops(secondaries kick on) it spikes a couple of tenths of AFRs. I run 40psi base fuel pressure with ID1000pri and ID2000sec injectors fed by Aeromotive stealth pump. I've been wanting to sort that out, as im not sure if it is a tuning issue or not. I cannot currently log fuel press. im working on it.

I was tuning 15U's car two weekends ago and I noticed his did this same thing. I dropped the crossover percentage from 40% to 30% and dropped the Ms to I think .05 and the problem went away.

It was occuring exactly at 40% where the secondaries came online.

The way this works is the secondaries and primaries ramp together given the time duration and the percentage. I don't see a negative to dropping the Ms time delay to almost nothing outside of a little overshoot, but I have yet to see the overshoot?

so try dropping the overlap time value......leave it at 40% and see what happens. I bet it goes away, if not drop the percentage where it ramps the secondaries up.

The settings are on the "settings 5" page.
Old 05-05-14, 04:00 PM
  #29  
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Originally Posted by fendamonky
I'm no expert, but that drawing looks like it's just begging for trouble.. I may (likely) be wrong, but it looks to me like the Primary rail is going to see a majority of the fuel, and the secondary is going to get less than it needs/wants.


If your lines are -6, but your rail is -8, why not just get a male/male fitting with -8 threads on one side, and -6 threads on the other?
The rails came with four -8 male/male fittings, so i thought id use them. my thinking is the tiny bit of extra volume using -8 line and fittings looping the rails will help even out pressure fluctuations.
also this way i only need to buy two -6 to -8 male to males.

Your concern regarding one rail getting more pressure than the other concerns me. I was thinking the same thing, but then thought if the pump and regulator are doing their jobs then pressure across both rails should be the same? I would be interested to hear others opinions on this as well
Old 05-05-14, 04:59 PM
  #30  
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Stick to single lines at your power goals. A single line should handle anything below 550rwhp with relative ease, especially with regular/race fuel (non-alcohol).
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