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Re: What's normal for inline HP fuel pump noise?
Do you know what the Micron rating on the filter is? I'm wondering if you have too small of an orifice, causing the pump to fight the filters. When you add heat and load, it gets worse.
My 255 whined occasionally until we switched the feed from -6 to -8. I have tank foam, and fill up as soon as it gets to the foam (about 1/3 left)
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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