using a pulsation damener vs not
there is alot of speculation about using a pulsation dampener or not using one.
many people get rid of it when it leaks or even before it leaks, not thinking twice of the possible risk of pulse waves in the fuel causing damage to the fuel injectors. is this hoax or is there evidence behind this IN STREET APPLICATION. most good fuel pressure regulators have a built in fuel pulsation dampener. aeromotive 1-1 as an example. this fpr sits after the fuel rail on the fuel return and dampens the fuel accordingly protecting the injectors from harsh waves. now every one i talk to and know they dont run a pulsation dampener, but the tuners i talk to say that they are a critical part of the fuel system and one must not go with out a pd. i would like to see a pole of who uses one (including fuel pressure regulator with PD built in) and who doesnt use one. including what size injectors you are using and what hp range as well as boost. |
mine is built in to my fpr, but i did not plan to purchase my fpr with one. it just decided to. all my friends have had theirs ditched and they run perfectly.
aeromotive fpr 550cc primary 1600 seccondary stock rails, an fittings and ss covered rubber line. |
never used one and never had a prob jessica! :) lol
lee runs 9's on a hurt motor and doesnt use one! lol |
My new setup, 720/1680 injectors, has one built into the Aeromotive 1:1. The old setup (550/720) went for about a year without a PD with no damage though.
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Originally Posted by fc3schick87
many people get rid of it when it leaks or even before it leaks, not thinking twice of the possible risk of pulse waves in the fuel causing damage to the fuel injectors.
is this hoax or is there evidence behind this IN STREET APPLICATION. https://www.rx7club.com/attachment.p...1&d=1269027699 Besides canceling out some noise as the fuel injectors operate, the PD is there to reduce variation in fuel delivery. On a practical level (not concerned about emissions etc), it's not that important for an n/a engine because the likelihood of detonation or lean mixtures is slim. On a turbo car it may matter more for the safety of the engine, but it still depends on many factors. |
I don't use one one my n/a, haven't had a problem. However, I'd invest in a new one if I were building a turbo car. The "The amount of injected fuel will be more or less than the desired amount" line scares me.
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i was wondering ussing the stock fuel setup, and ussing the banjo bolt and a FPR inline would this work, if the fpr has a PD built in then it shoudl be good right. hooking up the fpr right after the filter and still run the stock fuel setup, also making sure the FPR is just there as a PD and not bleeding excess fuel away, any ideas?
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the FPR should be last. Do not put it after the fuel filter.
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Originally Posted by arghx
(Post 9879274)
the FPR should be last. Do not put it after the fuel filter.
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the location of the PD is nowhere near as important as the location of the FPR.
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Originally Posted by arghx
(Post 9879549)
the location of the PD is nowhere near as important as the location of the FPR.
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That'd be a waste of an aftermarket FPR. There's nothing to lose by having the built-in PD located after the rails with the FPR. It will still dampen pressure waves and do its job.
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using a pulsation damener vs not
Sounds interesting but is she high maintenance? |
Originally Posted by satch
(Post 9879731)
using a pulsation damener vs not
Sounds interesting but is she high maintenance?
Originally Posted by Aaron Cake
(Post 9878848)
Originally Posted by 88redturbo2
(Post 9879373)
oh ok, but the PD comes first in the stock setup, so wouldnt you want it coming first also?
im not sure though. but think, if its just basically moving with the pulses and absorbing them like a shock absorber then anywhere in the fuel system near the injectors would be ideal. |
I bought a brand new one when I rebuilt the fuel system in my car. I don't like the design of the thing, but I feel pretty safe that it isn't going to leak anytime soon though. The old one I took off was scary looking.
http://img291.imageshack.us/img291/1764/oldpd.jpg |
Had one on my first FC, it was an engine fire waiting to happen. Before I removed it it could fill a shot glass after idling a few minutes. Replaced it w/ a banjo bolt, never had any problems.
I launched a preimptive strike on the PD in my current FC, replaced it w/ emissions removal. Been running the stock injectors and 9-10 psi like that for 3 years w/o issue. |
Originally Posted by RotaryRocket88
(Post 9879719)
That'd be a waste of an aftermarket FPR. There's nothing to lose by having the built-in PD located after the rails with the FPR. It will still dampen pressure waves and do its job.
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Originally Posted by 88redturbo2
(Post 9880118)
yeah i know it would be a waste, but i got a aeromotive FPR just laying around,i was just planning on running a banjo bolt and the FPR right after the fuel filter, and all id be ussing the aeromotive FPR for is for a PD not as a fuel pressure regulator, as in it would be allowing the same pressure in and out of it...sound like a waste of time?
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When i removed mine, it appeared to be in perfect working order.
I deleted it for peace of mind. The last thing i'd like to do is lose my car to an engine fire. And if you own a wideband to TELL you your air/fuel ratio, the tiny change that MIGHT occur from deleting it in your fuel delivery will be apparent and you can adjust your system accordingly if you need to. |
1 Attachment(s)
Originally Posted by fc3schick87
(Post 9879818)
i was told that a FPR that has a pd installed simply just absorbs the fluctuations in the fuel rails. i could be wrong but being that this is true, having it after the fuel rails would be almost the same as having it before.
im not sure though. but think, if its just basically moving with the pulses and absorbing them like a shock absorber then anywhere in the fuel system near the injectors would be ideal. https://www.rx7club.com/attachment.p...1&d=1269092026 If you put the FPR before the fuel rails... I don't even know how that would work. You would have a huge pressure drop I guess. You would be hooking the fuel rails to the return line from the FPR. I'm not even sure if the car would run. |
Originally Posted by sharingan 19
(Post 9880028)
Had one on my first FC, it was an engine fire waiting to happen. Before I removed it it could fill a shot glass after idling a few minutes. Replaced it w/ a banjo bolt, never had any problems.
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