[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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[jonmachota78]

Originally Posted by HWYSTR455

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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Im running a return.

[HWYSTR455]

Originally Posted by jonmachota78

Im running a return.

Hm, what kind of regulator? Maybe you need to use a better one? I've recommended and checked installs on 2 other cars, and they too are dead silent.

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[jonmachota78]

Originally Posted by HWYSTR455

Hm, what kind of regulator? Maybe you need to use a better one? I've recommended and checked installs on 2 other cars, and they too are dead silent.

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Its the jegs billet return style reg. Seems to be a nice piece. Pressure is set at 6psi and never goes below 5.5 or so at WOT. So i cant complain about performanc. I see holley sells a new gerotor for these pumps but for $70 im not real motivated to try it.. my car is kinda loud anyway. Now if i put some quieter mufflers on it them ill probably try and quiet down the pump too...

[HWYSTR455]

Yeah, I originally ran the first pump I had deadhead, and it overheated and started making noise. I called Holley about and they sent me a rebuild kit for free (took a number of calls). Even after rebuilding, it was noisy, so I just bought a new one. I added the bypass regulator setup before I bought the new pump, and even after that and the rebuild it was loud. Stuck the new one on there and it was silent. I think that very first pump I got lasted like 500-800 miles and it was done. Might have just been a bad one, dunno, maybe because it was deadheaded. But I had the lines all routed and out of convenience went with the same pump part . (Didn't have to route or change fittings). Think that pump has been on for well over 50k miles, have driven 1000+ of miles in a day, never had a problem. I had a spare for years I carried around, never needed it, eventually sold it.

I argued with Holley tech about running the HP pump deadhead, and they even told me they wouldn't warranty it if I go to a bypass. Did anyway. Glad I did. I also removed the shim relief and disabled the relief, let it rely on the bypass regulator only.

I had a Comp 140 on before, went through a few of them, they didn't last for continuous duty, though have heard others don't have a problem with them.

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