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Fuel Pulsation Dampers

Old 01-03-06, 01:17 AM
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Fuel Pulsation Dampers

I read the archived thread about pulsation dampers, and I saw that a lot of you guys replaced the dampers with banjo bolts. It's been a few years since that thread, and I just wanted to know how that's worked for you.

Also, i saw a few guys just use a hose to route the fuel to outside the engine bay for when the damper breaks. Has it broken yet? Did the hose work?

Just wondering, because a lot of those "My Car Burst into Flame" stories were with '87 Turbo II's..which I have. I'd like to keep my car uncooked.
Old 01-03-06, 01:20 AM
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go with the s5 fuel rails, those don't have the same style PDs.
Old 01-03-06, 01:25 AM
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Well im looking for a temporary fix until summer when i can rebuild my engine. Then I'll be switching to an S5 primary fuel rail.
Old 01-03-06, 10:16 AM
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S5 dampers can fail just like the S4's. Why would you want to rig up a temporary fix on something that could very well cause your car to burn to the ground? Get a new FPD or banjo bolt and fix the problem right. There is too much misleading information on this forum, go here for the truth-> http://www.fc3spro.com/TECH/FAQ/pd.html
-John
Old 01-03-06, 10:58 AM
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^^^^^^^ Word.

Do it right. I am going with the Marren FPD, just my preference.
Old 01-03-06, 11:46 AM
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Originally Posted by InMyWhiteTII
Well im looking for a temporary fix until summer when i can rebuild my engine. Then I'll be switching to an S5 primary fuel rail.
Those are still prone to failure, just not as often.
Old 01-03-06, 11:49 AM
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so youd suggest what, going to a banjo bolt? Ive heard of people removing the PD and going with a banjo bolt
Old 01-03-06, 02:22 PM
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You could go banjo bolt, or you could do the Parallel fuel mod and run an Aftermarket FPR. ITs all in how much you would like to spend, and how much work you want to do.

Some people will argue against the Banjo bolt mod, but whats the hand off? Uneven fuel delivery versus a burned down car? I think the answer is obvious.
Old 01-03-06, 02:24 PM
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Is there a mileage rating on how often you are supposed to replace the pulsation damper?
Old 01-03-06, 02:29 PM
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I am unaware of one..
Old 01-03-06, 03:05 PM
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Originally Posted by mazdadude
Is there a mileage rating on how often you are supposed to replace the pulsation damper?
There is not a factory recommendation for dampener replacement, however I recommend every 10 years or 100K miles (which ever comes first).
Old 01-03-06, 03:09 PM
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i completely forgot about the pulsation dampner. i bet mine has never been chenged. thanks for the friendly reminder!! no should i go banjo bolt or the PD???.....
Old 01-03-06, 03:23 PM
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Originally Posted by J-Rat
You could go banjo bolt, or you could do the Parallel fuel mod and run an Aftermarket FPR. ITs all in how much you would like to spend, and how much work you want to do.

Some people will argue against the Banjo bolt mod, but whats the hand off? Uneven fuel delivery versus a burned down car? I think the answer is obvious.

I like teh parallel fuel mod, but idk of anyone who has done it. If anyone has it please lemme know how its working for you, and some details if you got 'em .
Old 01-03-06, 03:25 PM
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Alot of us have done it, do a search for the Parallel Fuel Mod. I have it on my car also.
Old 01-03-06, 04:05 PM
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I am doing it right now....

This is a back shot, but you can see the AN fittings. After I get a bit more, I wil take a better shot.


Look at this thread to get ideas.
https://www.rx7club.com/showthread.p...ngine+bay+pics
Attached Thumbnails Fuel Pulsation Dampers-engine.jpg  
Old 01-03-06, 05:16 PM
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^^that pic. is teh sex!! i take it you got the motor rebuilt?
Old 01-03-06, 05:25 PM
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YearsOfDecay has a pretty good pic in that thread. Although it looks like his isn't a parallel setup.



But be aware, if you plan to go all stainless braided lines and AN fittings, things can get pricey fast. Here's some parts I was looking at getting. This doesn't include the pressure gauge but does include a new fuel filter.

About $370?
Old 01-03-06, 05:29 PM
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Originally Posted by 88rxn/a
^^that pic. is teh sex!! i take it you got the motor rebuilt?
Thanks !!!! Yes I did get the motor rebuilt.!
Old 01-03-06, 05:36 PM
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Originally Posted by The Wankler
I am doing it right now....

This is a back shot, but you can see the AN fittings. After I get a bit more, I wil take a better shot.


Look at this thread to get ideas.
https://www.rx7club.com/showthread.p...ngine+bay+pics
No rust on your exhaust manifold? Did you paint it?
Old 01-03-06, 06:20 PM
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Originally Posted by daten
No rust on your exhaust manifold? Did you paint it?

No, I had it sand blasted at Rotaryshack.com. I bought a Hybrid Turbo from Robert, and he blasted it for me. I would like to get it ceramic coated though.
Chris
Old 01-06-06, 02:19 AM
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Originally Posted by Icemark
There is not a factory recommendation for dampener replacement, however I recommend every 10 years or 100K miles (which ever comes first).
My pulsation dampener failed at less then 50K miles on itacording to the first owner, who kept great records . Failed again on me at about 150k. interesting that it did last about 100k the second time around.
Old 01-14-06, 06:28 AM
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So how did you guys attach your ss hoses to the fuel tank? Did you use the stock metal fuel lines? If so how did you convert the 5/16" (I think) metal tube to AN? Ive been wanting to do some upgrading of my fuel system but I cant figure out how to go from the tube to the SS hose. I saw that earls has an adapter that will do it, but it is listed for no more then 25 psi.
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