[HWYSTR455]

Originally Posted by jonmachota78

My hp150 is noisy as heck! Not quite as bad as my old holley blue, but still pretty loud.. i must just be lucky i guess. i even sent it back to holley, they inspected and tested it and said its OK and sent it back. It performs great and has been reliable though... just not quiet.

You must be running it deadhead, which in contrast to what Holley says, is not the recommended approach.

Mine I swear is so quiet, even with the car off, you have to stick your head down there to hear it run. I hear more from the regulator cycling when it's sat for a while than the pump.

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