Fuel pulsation dampner (keep or no)

[Warpath]

Hello All,

I've been reading some of the old threads regarding this question and unfortunatly some say keep it and some say don't. So i will ask if my particular setup will require it.

Mods:
-550cc rc injectors
-lex afm
-DM afpr kit
-walbro 255 pump
-57 trim ct26
-cartech intercooler
-intercooler hard pipes
-BIC ddp & full 3" thunder exhaust with test pipe.

I appreciate any help.
Jim

 

[TurboStreetCar]

Its not a mater of whether your setup requires it or not. It smooths the pulsation of the closing injectors. It prevents the condition similar to "water hammer" in home heating systems. Its something good to have but not required.

It takes strain off of the FPR, pump and injectors themselves. If your using rubber lines for the feed (not braided lines) then i wouldn't worry about it as the hoses absorb the shock themselves. Im going to be running aluminum fuel lines without a damper unless i can find something when the time comes. I have not really looked thus far.

 

[isnms]

I kept mine.

Here's a post I made and Mr. Y informed that Marren makes a performance damper.

 

[Warpath]

Its not a mater of whether your setup requires it or not. It smooths the pulsation of the closing injectors. It prevents the condition similar to "water hammer" in home heating systems. Its something good to have but not required.

It takes strain off of the FPR, pump and injectors themselves. If your using rubber lines for the feed (not braided lines) then i wouldn't worry about it as the hoses absorb the shock themselves. Im going to be running aluminum fuel lines without a damper unless i can find something when the time comes. I have not really looked thus far.

I kept mine.

Here's a post I made and Mr. Y informed that Marren makes a performance damper.

Thank you both for the replies. I was just wondering since some of what i had read was telling me that in some cases it could act as a restriction. Just wanted to make sure i was covering all the bases.

-Jim

 

[IJ.]

You can buy aftermarket high flow damper assemblies, I don't run one at all but my lines are all rubber from pump to rails.

 

[Warpath]

Thanks Ian, I will definatly check that out. I have the steel bradied return lines that came with the DM AFPR kit. But the supply lines are stock that lead up to the FPD.

-Jim

 

[92TealSupra]

You can buy aftermarket high flow damper assemblies, I don't run one at all but my lines are all rubber from pump to rails.

You used rubber to dampener the force of the fuel Ian? Was there because you removed your dampener, or just because you wanted them?

 

[arknotts]

I'm in the process of installing my AFPR right now and I have all stainless braided lines (all 3: stock feed at the bracket bolted to the block to fuel rail, rail to AFPR, AFPR to tank return). Now the braided lines are actually rubber that is lined with braided SS. Is the braid really stiff enough to keep the hose from flexing and absorbing the pulses? Is it worthwhile with braided lines to get a FPD? Granted, I hope to be pushing 500whp eventually if that matters. (I mention that in case it becomes more/less beneficial with higher horsepower)

 

[IJ.]

You used rubber to dampener the force of the fuel Ian? Was there because you removed your dampener, or just because you wanted them?

Just about always run rubber lines here, anywhere there's limited ground clearence get's a sheild, hardlines tend to crush if bottomed out on anything and I'm not a big fan of braided lines where they're not needed.

I ran much the same twin system on the 7M with 2 pumps 2 lines the whole way to the fuel rail with a 1 way non return valve in each line just before the rail, this way I can run a single pump at st 50% speed/volume for daily driving and have the 2nd pump boost operated, doing it this way meant the damper had to go though.