Were The Heck Is The Fuel Pulsation Dampner
#26
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Originally posted by JONSKI
The people who have eliminated the FPD say they haven't had any problems. The FPD is there to absorb the pressure pulses generated by the injectors. By doing this it keeps the fuel rails and fuel hoses from vibrating and shaking loose. Supposedly.
The people who have eliminated the FPD say they haven't had any problems. The FPD is there to absorb the pressure pulses generated by the injectors. By doing this it keeps the fuel rails and fuel hoses from vibrating and shaking loose. Supposedly.
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#27
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Originally posted by JONSKI
The people who have eliminated the FPD say they haven't had any problems. The FPD is there to absorb the pressure pulses generated by the injectors. By doing this it keeps the fuel rails and fuel hoses from vibrating and shaking loose. Supposedly.
The people who have eliminated the FPD say they haven't had any problems. The FPD is there to absorb the pressure pulses generated by the injectors. By doing this it keeps the fuel rails and fuel hoses from vibrating and shaking loose. Supposedly.
If yes, is a FPD something that is typically designed into the system? Would you say that it's necessary?
Finally, if it really is necessary to have a FPD, is there a more robust alternative to Mazda's part that we can adapt to the FD?
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Yeah, that's what I'm thinking, but I'm one of the AST believers ![Smilie](https://www.rx7club.com/images/smilies/smile.gif)
It's probably a bad comparison, but everyone's probably been in a house with water pipes that bang when a faucet is shut off. I understand that they include sealed air chambers as part of the plumbing system to "buffer" the pressure variations and prevent that type of noise. Thus, if you do hear the banging, it means that the air chambers have filled with water.
So we have our 40-60 psi (?) fuel system-- could it suffer the same effects? Do the pressure changes in the fuel system cause major stress on the components if undamped? I'd hate to remove the FPD, then have a fitting or line burst from the effects of a shockwave.
OTOH, we already know that the FPD itself is of questionable durability. That's why I'm wondering about alternative FPDs...
![Smilie](https://www.rx7club.com/images/smilies/smile.gif)
It's probably a bad comparison, but everyone's probably been in a house with water pipes that bang when a faucet is shut off. I understand that they include sealed air chambers as part of the plumbing system to "buffer" the pressure variations and prevent that type of noise. Thus, if you do hear the banging, it means that the air chambers have filled with water.
So we have our 40-60 psi (?) fuel system-- could it suffer the same effects? Do the pressure changes in the fuel system cause major stress on the components if undamped? I'd hate to remove the FPD, then have a fitting or line burst from the effects of a shockwave.
OTOH, we already know that the FPD itself is of questionable durability. That's why I'm wondering about alternative FPDs...
#30
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so called "water hammer" usually occurs in plumbling systems when there is a sudden closure/restriction of flow, which in turn causes a violent shock wave to reverberate back through the system....I guess a high pressure fuel system might be analogous
interesting reading http://www.omega.com/techref/waterhammer.html
I'd like to know how many forum members with 100k+ miles still have the stock FPD in place
interesting reading http://www.omega.com/techref/waterhammer.html
I'd like to know how many forum members with 100k+ miles still have the stock FPD in place
#31
here is an aftermarket FPD. i don't think that it is made FOR cars, but would probably work. just use a T fitting and put it in line. I wonder how high G cornering would effect it? ![Smilie](https://www.rx7club.com/images/smilies/smile.gif)
http://www.matronics.com/fuelchec/dampener.html
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http://www.matronics.com/fuelchec/dampener.html
#32
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Hmmm, looks like they designed it for airplanes, so I would hope that it would operate correctly under the G loads a car would produce. It's $47 including the T-fitting...
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