dual pump noise

Dzchey21 · May 30, 2013

I think at idle there is just too much flow from the pumps and not enough needed since idle should be similar to stock

bigrpowr · May 30, 2013

Dzchey21 said:
I think at idle there is just too much flow from the pumps and not enough needed since idle should be similar to stock

and extra steel line creating harmonics a that flow level ? my silver truck is minimal at worst.

Dzchey21 · May 30, 2013

i know the harmonics exist otherwise, i could hear it with a modded pump and stock lines, its just not pronounced like dual fuelers.

bigrpowr · May 30, 2013

Dzchey21 said:
i know the harmonics exist otherwise, i could hear it with a modded pump and stock lines, its just not pronounced like dual fuelers.

i never heard it with a mod'd pump. must be the altitude.

Dzchey21 · May 30, 2013

no you just have your music up to loud

91turbogsx · May 30, 2013

Dzchey21 said:
The part that kills me is when my truck is cold it makes no noise, part of me thinks its in the tuning

Same for me even with the RCD setup.

78f100 · May 31, 2013

I had the humming line when I had ported rails, Is that similar to what ya'll are hearing?
I have the DD dual fueler and it is very quiet, sounds like stock other than belt squeak when I shut it off. Sounds like a cummins at shutdown.

Wayne · May 31, 2013

Most of the vibration could be caused by lines on a bind. Every twin pump kit I've done so far has been quiet as stock until Erik's. That had a horrible hum at idle. As it turns out, the line was overtorqued, and a bit twisted. I just replaced it, being extra careful on the torque, and it went away completely. I just used assy lube where the nut meets the end of the line, to eliminate, or at least minimize line twisting while tightening .If you could get some anti-seize in there, without contaminating the fuel system, I'm sure that would help too. Pillow clamps like Haller used are also a great help. Good luck.

thuglike · May 31, 2013

Well...I covered the line with FatMat sound deadening material and did a temp zip tie from the line to the i/c pipe and the noise is totally gone...I'll take a pic later but no more rattle or loud hum from the line at all.