I'm in the midst of tieing up my fuel system, and I'd like to know what the consensus is with the rest of you running 1600cc secondaries, aftermarket FPRs, big fuel pumps. How many of you have run a setup that does not include some sort of fuel pressure dampener? How do you like it so far?

 

I do not currently run one, but I will be in the near term. I have not had any problems, but for ~125.00 why not run the Marren? I am running am A1000 and 1680 secondaries. I can definitely feel the pulsation in the lines when the motor is idling(hand on a line, or rail). I think it is just a case of an inexpensive reliability mod. I have an Sx rrfpr. I run secondary to primary in series. It would be "T'd" in between the two, or after the primary, before the FPR. I think the fact that the FPR sees fluctuating pressures is the potential problem. I have a -8 feed, the larger your lines, the less critical it probably is, due to the damping by the shear volume of the line. It takes 3 gallons of fuel just to prime my system(including a 1/2 gallon surge tank). Carl

 

I'm still running the stock FC one. though about getting rid of it....decided against it.

 

I'd run none over the stocker. The stocker is designed for ~45 psi, I run 60-70psi. One screw loose, and you are done.

 

I run 45psi base, and up to 65psi boosted. No dampner with the Bosch '044, 860cc and 1680cc's. Rock steady fuel pressure with no logged dips or delays coming off the gas.

Tony

 

Aeromotive pressure regulator that most of us use includes pulsation dampening due to its diaphram design- info is in the literature that comes with it or available online I believe.

 

You should run a PD on each rail. Yes some of the aftermarket FPR's come with a PD but is very pore. Without a PD the injectors opening and closing will cause harmonic bounces in the rail. This can and will cause injectors to get stuck open or be starved for fuel. In short do not run straight batched fuel setups. Run independent lines with a PD on each rail.

 

Great point! I use the Aeromotive unit, both rails join up at the FPR. Learn something new everyday.

BTW, the SX unit is the same design but has very small internal twists and turns.