Fuel Pulsation Damper? Needed?

[Hybrid EG]

The "fuel pulsation damper" is located on the end the fuel rail, on the opposite side of the FPR.

My question is, is this unit absolutely needed? I was swapping out the OE fuel rail in favor of a AEM one. And I planned to upgrade the whole fuel system at the same time. My problem is, the aftermarket fuel filter (with Aeroquip hose and AN connectors) uses the -6AN connector to connect to the AEM; this leaves no option to mount the pulsation damber but to leave it out of the fuel system.

Will it have any side effect on the car, i.e., bad idle, random power lost (being rich), and etc.?

My setting is JRSC @ 6psi, stock injectors, BOSCH pump. Since the motor is out of the car, I am not able to determine the side effect.

Any insight is greatly appreciated! Thanks!

Derek

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[bobbrown]

In so many words - Yes. Especically if you're running stock injectors. Under full boost your fuel pressure is extremely high and the back pulses from the injectors opening/closing can be very strong. Install it with the aftermarket fuel rail. I'm not sure what effect it would have if it were to be omitted, but I can't imagine the results would be favorable. As far as I know, all fuel injected cars have some sort of pulsation dampers.

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2001 GS-R, JSRC 6psi (215whp & 157trq), Kami Headers, AEM CAI, AEM Cam Gears, Tanabe G-Power Exhaust, H&R Sport Springs, Tokico 5-Way Adjustables, MufflerTech Custom Test Pipe, 17" 5-Zigen GT8 Wheels, Neuspeed Short Shifter, Neuspeed Front Strut Tower Brace, B&M FP Gauge, JR MAP Controller, Zip's O2 Simulator, Skunk2 Rear Sway Bar, Skunk2 Rear Strut Tower Brace

[VaporTrail]

The result would be spikes in fuel pressure at all times, worse under higher fuel pressures. You definately want this piece installed, otherwise your car will not run properly.

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-JG-
-1994 Civic EX-
-Turbo and 2.0 buildup in process-
-vapor-trail.net-

[marouj_moron]

We build fuel lines without them and there's no difference in low or hi rpm operation. Nobody uses them with stainless steel fuel lines hooked to stock or bullit fuel manifolds.

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[SuperTeg]

I haven't had mine on for about 2yrs. now and no problems so far. I made a fitting to go to my str fuel rail and the fitting didn't involve the dampner. Car runs like a champ.

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95'GSR w/JRSC at 6psi.
1/8 mi. 8.44 at 81mph.
Hp 226.7 torque 159.8

[grand600]

This is very interesting has anybody done any extensive research on this matter??? I would like to know just for the sake of knowing???

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JRSC @8psi RC 270's, cartech 2025i water inj, jr map mod, vpac, JR BTC, dcsports 4-1, apex-i N1 catback 2.1/4", 2.1/4" test pipe, Zip22 02 sim, J&S safeguard, fuel pump, aluminum fly(6.5)lb, center force dual friction clutch. A/F gauge, FP gauge, boostgauge, EGT gauge, MSD digital 6, blaster coil, MSD cap, magnacore wires, J&S dual monitor.

[marouj_moron]

ImportBuilders has done scientific testing and research on it and it's not needed.

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