I run a triple 97 carb set-up on my highly modified '32 4-banger...using a Holley regulator running at 3 psi. After a couple of minutes running, I get 0 pressure. It's delivering gas, but starving when driving. Another one of my cars is a '39 with twin 97s. I run a Mr. gasket regulator and that also failed. Could not even get the engine to run longer than 10 seconds. What I need is a good dependable regulator. Any suggestions ? other than the two ****py makes I had. More money is not the problem, I just want one that is dependable.
I have run Mallory regs with good success. Unfortunately I doubt that you can buy one new, as Mallory doesn't exist any more. Aero-quip makes a good regulator. they are pricey and billety.But they work. I think you'll find that about any regulator you find works off of a diaphragm. You probably need to find one that is alcohol compatible.
Do you know for sure if you have a regulator that was made to start with at factory for 3lbs.? Even though they look a like. Regulators come with def set ups inside them as to what PSI they are made to work at= if you have a regulator made to work at 6 to 10psi,but you set it lower then it was made for{ like 3lbs}, you may get it to read 3psi,but it will not hold or even just close up.
ive run a holley regulator for 15 yrs on my coupe and never had any issues, got another on my roadster and it seems fine up til now too. I have a holley red pump on the coupe and it runs a tri carb on a sbc. on the roadster ive got a carter pump and its running twin 97s on a flathead. triple carbs on a 4 banger? I'm surprised it runs at all with that many carbs on it. are you sure your issue isn't overfuelling? when you say its running at 3psi is that the pressure you get when driving or sitting idling? can your pump keep up with feeding 3 carbs?
This is a highly modified Overhead Valve engine with an equally wild cam. Plugs are at a nice even brown color, so no, not over rich. Starving for gas is not good for such an engine.
which regulator is it? https://www.summitracing.com/parts/hly-12-804/overview/ or something else? Did you put a pressure gauge before the regulator to make sure it's getting fuel to it?
Had a dual 4 setup on a 327 in my 57 panel that wWnd go again when you nailed it. After a week or so of that after I got it running I pulled the lines off the carbs and found a br*** fitting in the line with a tiny orifice that was probably for natural gas. Who ever had set the carbs up and installed the engine had used it when they put it together. Changed the fitting and it ran like Jack the Bear. What I am getting at is that somewhere in that setup could you have a restriction that shuts enough gas off after it fires up that it dies or boggs down to where it won't run right?
I've used (higher pressure) Holley regulators like this for years, never had problems with them until they get old and start to leak. I doubt ethanol is the problem....unless maybe you let it sit for several months at a time...
Empty the silicone fluid out of the regulator pressure gauge and it will work better at giving accurate psi readings. That's what I found.
If you want a reliable low pressure fuel pressure regulator this Aeromotive one is probably the best. Not cheap but worth it. And ignore that stupid advice on draining the fluid from the pressure gauge. They're designed to have the fluid and work best as designed. http://www.jegs.com/p/Aeromotive/Aeromotive-Ultra-Low-Fuel-Pressure-Regulators/3440692/10002/-1
The absolute best fuel pressure regulator is Malp***i. Infinetly adjustable, and it maintains the set pressure. I bought mine on e-bay from a company in England, the regulator was delivered within a week,very good guys to deal with. Malp***i regulators are made in Italy. Tom Sent from my 6045O using Tapatalk
I have a Malp***i sitting in the shop new in the box. I don't like the gl*** bowl on it. Too vulnerable to damage on an open wheel car. I'm going to use the Aeromotive one instead.
Just for the hell of it ,is there something floating around in tank ,when runing a few it ****s up to pick up ,then after It dies float away until next time , I have experienced this before , I have ran Hollys for many years like someone else says after a few years they start to leak , Aeromotive does have a good regulators
Blue One Re: "And ignore that stupid advice on draining the fluid from the pressure gauge." All I can say is that my stupid advice works for me. Your remark was uncalled for.
I have a regulator you might be interested in. Enderlie Injection make them for me, they are 3psi poppets that you 'tee' into the pressure line and the poppet goes between the pressure line and the fuel supply line to the fuel pump. When the pressure exceeds 3psi the poppet opens and send the excess fuel back to the fuel pump (you can send it back to the tank if you want) and fuel continuously flows. The pics show the poppet and one plumbed into a SBC.
Just because it works for you doesn't make it right. And yes, the remark was called for. Far too many times bad advice is given and followed blindly. Fluid filled pressure gauges are fluid filled for a number of reasons including the fact that the fluid dampens pulsations, insulates and lubricates the gauge internals and INCREASES ACCURACY over the life of the gauge. So, draining them is a bad idea, and contrary to your belief they do NOT give more accurate readings when drained.
Yea, that "stupid" advice also worked on my fuel pressure gauge, and was given by a very knowledgeable and well known friend many years ago. I also had to drain all high pressure brake system fluid-filled gauges to obtain fast (and accurate) response during my dynamic vehicle test employment. Fluid filled gauges may have their purpose, but I haven't found any with fuel or line pressure gauges. Yes, the remark was uncalled for, but not the first from Blue One.
The problem I had with my liquid filled gauge is that I didn't read the instructions about the little valve on the side. You're supposed to open it to let the pressure equalize when the temp changes. Now it works great, I just do that every now and then.
Sorry guys, been away for a few days....hernia operation does that to guys. I'll definately look into the aeromotive unit. All of the above possible problems have been tested, and in Canada, we do not have menthol in our gas. In fact, we are lucky to have 'Petro Canada' gas hi octane rated at 94 octane. For those who wondered about gas tank problems, yes, I ran a direct rubber gas line hose into the tank via the gas cap, direct to the fuel pump, gauge at 6 psi, and it runs perfect.....did this test before and after I removed the reg. Did now notice the 97s are sweating a bit, so have to go back to 3 PSI.
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