fuel pulsation damper

[ULTM8Z]

Anyone running an aftermarket one with their EFI conversion? I just bought a Tanks EFI tank for my 1971 Camaro and I can't use the original GM one anymore (the one that goes in-tank on the supply line).

Looking for an external one. The pulsation noise is quite loud now, hoping to damp it back down.

[no go nova]

Don't the factory ls and vortec motors have them built into the factory rails?

[no go nova]

http://www.radiumauto.com/Fuel-Injec...mper-P300.aspx

[cornfedbill]

Don't the factory ls and vortec motors have them built into the factory rails?

The LS rails do. The older plastic Vortec rails do. The newer Vortec rectangular steel rails are "self-damping".

[cornfedbill]

Anyone running an aftermarket one with their EFI conversion? I just bought a Tanks EFI tank for my 1971 Camaro and I can't use the original GM one anymore (the one that goes in-tank on the supply line).

Looking for an external one. The pulsation noise is quite loud now, hoping to damp it back down.

If you run a regulator near the fuel rail, it may dampen better than controlling pressure at or near the tank.

The later returnless LS1 rails have a damper in the crossover that looks like the regulator. This one is a bit bigger and may be more effective than the smaller screw-in aftermarket dampers.

[ULTM8Z]

http://www.radiumauto.com/Fuel-Injec...mper-P300.aspx

Interesting. Thanks for the link. I'd have to rig up some receptacle in my fuel rail setup to screw this in to...

[andrewb70]

Bill,

I see that some dampers have a vacuum hook up. Can you elaborate on that?

Andrew

[cornfedbill]

Bill,

I see that some dampers have a vacuum hook up. Can you elaborate on that?

Andrew

Andrew,

Yes I can. The vacuum reference helps to keep the diaphragm in a neutral position so it works best. If the fuel pressure is referenced to manifold air pressure (MAP), than it will vary depending on throttle position and engine speed. The vacuum reference makes the damper more effective. This does not work for constant pressure systems or for some of the newer constantly variable pressure systems.

[ULTM8Z]

So for a TPI fuel system where the pressure stays pretty constant (at least mine does), a non-vacuum-referenced damper should be sufficient? The OEM one was certainly not that elaborate...

[andrewb70]

This one seems to be inexpensive and easily adaptable:

http://www.amazon.com/401-0012-Press...ds=fuel+damper

Bill,

If a damper is designed to be used in a system at 48psi, is there a danger of braking the damper if run at 58psi?

Andrew

[cornfedbill]

So for a TPI fuel system where the pressure stays pretty constant (at least mine does), a non-vacuum-referenced damper should be sufficient? The OEM one was certainly not that elaborate...

Correct.

[cornfedbill]

This one seems to be inexpensive and easily adaptable:

http://www.amazon.com/401-0012-Press...ds=fuel+damper

Bill,

If a damper is designed to be used in a system at 48psi, is there a danger of braking the damper if run at 58psi?

Andrew

Andrew,

It is very unlikely to break simply because the margin of safety most fuel system suppliers use. It may not work optimally though.

There is a point where the damper is "bottomed out" and loses most of its effectiveness.

Bill