So, im finshing putting another engine in one of my cars...when we came across an intresting querry. Do we put another pulsation dampner on my fuel system but risk another fuel leak? Or do I delete the dampner all together and just run a straight fitting? The problem Im wondering about is will this flood the primary injectors? Could I just delete it altogether and just run the fitting straight to the fuel line with out any danger? If so what are the benefits if any? Thank you all for your input

 

the FPD does just that. it dampers the fuel pulse to smooth out the actual line pressure the injectors see. put you hand on a fuel line and rev the car you can feel the pulses even when everything is "stock" and correct. you need it unless you have a FPR that will act as one.

alot of Forum Engineers will say it is usless. i have yet to see one that just went and was not an ignored fuel smell from the owner. is this on an fd?

 

a new dampner is like 75 bucks, expensive but neccasarry. you will most likley destroy the injectors if you are running them hard. the pulses inside will keep slamming the injectors shut after each cycle and eventually the plunger won't move anymore. this is especially commin for those of us that run stock injectors for primaries and larger(1600) injectors for the secondaries.

 

Ditch the dampner, I've never had a problem running without one on any car I have ever built. It's not worth the risk burning your car down.

 

Its an FC, the problem is that i've already had this problem occur to me once. I dont want history repeating itself once again...I would just want the car not having that fuel smell or catching on fire. I just want to know if I run any risk to the internals or the seals...or is it more dangerous just putting that line without the dampner.

 

Heres what I did: I got rid of the hard line set-up (containing all the vacuum lines and what not) that goes from the rail to the side of the engine. I ran a piece of rubber fuel line from the filter to the primary rail, and my car has been fine for over a year. I figure that the forgiveness of the rubber line will act as somewhat of a pulsation dampener. I personally don't think that the dampener is needed. I'm now getting rid of that set-up and running bigger braided lines parallel to the rails, along with a bigger hardline from the tank up. Also, an easy way to know if you need a new dampner is look to see if the screw has fallen out, if the screw is out it usually means the leaking fuel has caused the thread sealer to dissolve and let the screw get loose and fall out.

 

^ thats fine, i went through over 500$ in primary fuel injectors because i ran with no dampner. i even had the aeromotive fpr and it didn't help. get into high fuel flow and high pressure and you'll ruin them. spend 75 and get the new dampner, it wasn't put on there just for the heck of it. my .04

 

Sounds like you had another issue going on, I've run all types of cars including my FC's FD's, Supras, SR20's, EJ's, and plenty more with high pressure and high flow systems built for over 800 horse with absolutely no problems. Plenty of miles on most of my setups. If you use good quality products, Injectors....ETC, then you should have a problem.

In any case, I believe it's more expensive to replace a burnt down car than any part of the fuel system. We all know they have problems and always will have problems.