5 hours ago, JUSTA6 said:

Sold as a pair. That way they make sure you have a regulator in the system.

I agree, and in theory it makes sense. My confusion is why the pump is a set pressure that is higher than the advertised max pressure of the regulator that came with it. I had everything torn down including the electrical, justa the empty housing and didn't see a way to adjusta the pressure of the pump itself. That's the question I'm wanting to see if Holley can answer, I justa didn't know if I was missing something.

I justa got off the phone with Jason again at Holley tech support. I really don't like this guy. Same guy I talked to the first time. He said he remembered me and still says that they have never seen this issue and acts like I took sandpaper or a pocketknife to the inside of the fuel bowl. Anyways, he said the pump is nonadjustable at 14psi and would not give me an actual MAX pressure for the regulator. He did assure me that it would handle 15psi with no problem, but the adjustment screw would only allow it to be adjusted between 4.5 and 9psi. So there we have it. If the rain stops, I will get it installed and hopefully take her for a drive, if not, tomorrow maybe.

I would imagine, the 15lbs would be to handle 2 carbs? If necessary, they would have to cover all scenario's. Best I can come up with.

12 hours ago, JUSTA6 said:

I would imagine, the 15lbs would be to handle 2 carbs? If necessary, they would have to cover all scenario's. Best I can come up with.

That makes sense

Well, no test drive as of yet. When installing the fuel pump my son over tightened the fitting on the outlet side of the pump and stripped the aluminum housing. So, I guess I'm going to pick up a Heli-coil and try that unless y'all have another idea.

Justa an update, so no heil-coil, after looking at the parts house I looked online. No luck, according to their website they don't make this size. So unless I can come up with another fix, I guess It'll be another fuel pump. I did think of tapping it but I'm afraid there's not enough meat left for that. A friend suggested "cold steel" where the threads were, thread in the fitting and thread it out then let it harden. I'm concerned about leaks or if it ever comes apart it clogging a filter or the regulator.

Am I missing something? My car has stock fuel pump & no regulator and runs like it should. Surely, the needle & seat act as a sufficient regulator under standard conditions. Even with my foot mashed to the floor there is no shortage of fuel getting to carb.

Is there a reason why you have opted for a high performance pump & reg?

There appears to be plenty of metal remaining to tap that hole. What do you have to lose by trying to run a tap through for all new threads?

I'd also consider the use of some green Loctite 290 compound to act as a sealant for the stripped threads. Again, what do you have to lose here if you think your next best option is an all-new pump? The green Loctite should be considered as a permanent fix and that you will never be able to undo that particular connection. Also, it is heat and fuel resistant.

Rick

7 hours ago, Fitzy said:

Is there a reason why you have opted for a high performance pump & reg?

No real reason bro, more for convenance. When I replaced the old one during the build I justa decided to go electric this time. The electric I bought I was told was too small, so I bought this one with hopes of turning it down and it doing its job. If I decide to add anything like power adders or change anything later, it should still handle my needs. Well, that was the thought.

3 hours ago, B52bombardier1 said:

There appears to be plenty of metal remaining to tap that hole. What do you have to lose by trying to run a tap through for all new threads?

I'd also consider the use of some green Loctite 290 compound to act as a sealant for the stripped threads. Again, what do you have to lose here if you think your next best option is an all-new pump? The green Loctite should be considered as a permanent fix and that you will never be able to undo that particular connection. Also, it is heat and fuel resistant.

Tapping it has been on my mind today, Rick. Kind of the same thought, its already messed up so why not. Hadn't thought about the green lock tight though. Thanks for the idea bro.

On 11/14/2025 at 9:08 AM, Wrongway said:

Justa an update, so no heil-coil, after looking at the parts house I looked online. No luck, according to their website they don't make this size. So unless I can come up with another fix, I guess It'll be another fuel pump. I did think of tapping it but I'm afraid there's not enough meat left for that. A friend suggested "cold steel" where the threads were, thread in the fitting and thread it out then let it harden. I'm concerned about leaks or if it ever comes apart it clogging a filter or the regulator.

mate, justA run a tap through it and get yourself a shouldered fitting and a copper crush seal, i see a nice flat face that it could seal on and in deep i see the thread looks ok

JB Weld...nuff said!!!

JB Weld will certainly do it. I'm a certified JB Welder and love the stuff. Lots easier to find than the green Loctite, too.

Rick

Ok so I've been a bit busy and hadn't had a chance to update. I think Holley may have justa put out a bad batch of fuel pumps. I did end up JB Welding it and as always JB worked like a champ. Once reinstalled back on the car it and power to the pump turned on it the pump worked great. Fuel filter filled ALL THE WAY UP. Car started and idled fine. I only let it run about 10 min. Shut it off, no dieseling. Great! Decided to wait until my son got out of school to restart it so we could go for a drive. Nope! When he came out and we restarted it, the pump was loud, the fuel filter barely filled to the halfway point. The acted exactly like the last one. So, my thoughts are the little steel blades on the rotor are wedging up against the aluminum fuel bowl in the pump and locking up. This is causing that skipping that we see in the first pictures I posted of the inside the pumps fuel bowl. When it locks up it can't build pressure, so it doesn't fill up the fuel filter and so on. here's pics of the JB and videos with 2 different gauges reading the pressure. I'm thinking it's time for a new non-Holley fuel pump.

That pump sounds awful!!

Rick

Was that the Holley ???? Sounded like you had a concrete breaker doing your driveway !!!

She’s stuffed mate !!!!

There are lots of nice quiet solid state pumps out there mate

I haven’t been a fan of the Holley pumps

Always loud and they really are not doing a big job ! You only need 5-8 psi

JustA grab a Walbro pump and be done with the meat grinder 😜

Edited December 9, 2025Dec 9 by 64 kiwi boni

Yeah guy's, that's the NEW (2nd) fuel pump. I've never been a Holly fan either Kiwi. The only reason I even tried their fuel pump was I got such a good deal on it. But yeah, I'm looking at something else now. Trying to decide on what.

Have to ask where you are mounting the pump? Many will not pull fluid more than 12in high. I use the tank strap bolt at the frame to make my mount from. If needed you can remove the 1 bolt or all drops down together when dropping tank.

I made a bracket, picture a 4" C channel that bolts to the frame directly in front of the tank. The bracket is held on with 2 bolts so you can remove everything or justa the 2 bolts mounting the pump to the bracket. When mounted the pump sits slightly above the tank but the inlet and outlet fitting are justa below where the factory fuel lines came out of the tank and it does gravity feed into the filter I have between the tank and pump. I'd show you a pic, but it's snowing and too damn cold for me to go outside.

Hey y'all, still playing with fuel issues but I think were on the right track. So, we tossed out that piece of shit Holley fuel pump and replaced it with an Edelbrock. I had a couple conversations with Edelbrock after, and it looks like there was more than one problem. So first, I had mentioned a concern that the fuel filter had not been filling completely up, only about half to 3/4 full and the fuel pressure was only showing about 3.5PSI He said that could either be the regulator (Holley also, it came in a kit with that fuel pump), or something wasn't sealing. The Edelbrock pump is factory set at 6.5 PSI so the regulator was removed to see what would happen. Now, new fuel pump, fuel pressure gauge fuel filters then carb, that's it. The fuel filter filled up full so there was also an issue with that regulator also. As pressure started to build up fuel started bubbling up from the carb vents on top of the carb. Remember while trying to tune the carb we had fuel running over the top of the carb and dieseling after shutting her off? So the Holley pressure spiked and I had to readjusta the floats to stop the flooding. But it continued to diesel justa bit on the last test ride. Because Edelbrock said something might not be sealing and that could cause low PSI I looked at the needle and seats and seen a small indention circle around the needle tip in the coating. Edelbrock said that the pressure spike could have forced the needles up hard enough to cause that ring and it would allow fuel to seep by. New needles and seat installed. Everything hooked up and power on to pump, fuel still bubbling out the top. Carb back on bench. Checking over every single piece with a big ass bench mounted 6" old man light up magnifying glass I found what I think was causing the flooding issue. I tiny pin hole in the float! Pin hole soldered up and water tested since yesterday. No air bubbles and no water in float when I shake it. We will see what happens in a couple days when it warms back up a bit.

I love your tenacity going at this problem Wrongway. Excellent progress. Keep it up, we are all rooting for you!

1 hour ago, Frosty said:

I love your tenacity going at this problem Wrongway.

Read this quickly as "love your tenacity about going about this problem the wrong way." Was like "man, Frosty doesn't sugar coat it."

Nice work mate 👍👍👍👍

So, I have a dumb ass embarrassing question to ask that I SHOULD know the answer too! I might ask later or tomorrow. But today, right now I justa want to celebrate my small win with yall.

Wrongway !!!!!!!!! woop woop !!!!! wayyyyyyyy cool the 63 sounds strong as !

my god !!!! all your hard work has paid off !!!!!!

i am so impressed !!!! it inspires me !!!!!