How to Choose the Right Fuel Pressure Regulator
Choosing the right fuel pressure regulator is critical to the proper operation of your engine. Doenst matter if its a big or small power engine, they all need to be regulated to get the best performance. We’re cover all the things to consider when making this selection.
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#pressureregulator #fuelsystem #aeromotive
I just did a V8 swap on my S10 Blazer it did not have a provision for a mechanical fuel pump so I got a Edelbrock micro inline fuel pump my truck came factory TBI so it has a return line to the tank I ordered the Holly 128866 I think it is it looks like your fuel pressure regulator but it is a return style I have a Mr gasket fpr currently but it’s not hooked up it’s brand new in the box and I said no and ordered the Holly return style I have a Edelbrock avs2 brand new in the box carburetor I have lots of nice parts if you check my channel I’m going to put a few more things on my channel I just started working on this Blazer I’ve had it for about 10 years but I totaled my Nissan 300ZX and almost got killed about 4 months ago that was my main car for this channel 1 low z but now my setup is going to be more like yours with the Holley fpr and any advice would be helpful I’m used to building a vg30 for the Nissan now I have a SBC 350
Hey there how are you doing I was just watching your video I have a question I have a 71 Buick LeSabre with a 350 motor that I thought was a 430 big block I ended up buying a Street demon 750 carburetor for it but I actually think it’s too big because I just found out that it’s a 350 motor will adding a fuel pressure regulate help it bogs down and lacks power when I accelerate from the light
Have a question hopefully you can help . I bought a Quick Fuel 30-899QFT Quick Fuel Fuel Pressure Regulator that has an idle bleed jet in one of the inlet/outlets . I’m wondering what side is the inlet from fuel supply ? It’s not mentioned anywhere nor in the directions. The side with the idle jet or the opposite side … im running my regular after the fuel log return to the tank and other side blocked off … this order :fuel pump-filter-carb-gauge-regulator-return .. I’m having a pressure drop from a steady 6psi before regulator install to 3psi after I installed regulator .. the regulator is adjustable 4-9 psi and supposedly factory set to 6.5 psi … can’t understand the drop to 3psi unless the new regulator is bad
I have the Holly regulator and a good gauge installed, sometimes I check the pressure and it’s reading zero, still runs fine, just curious. Thanks.
My God, Aeromotive is $$$, but I am sure worth it. Especially since have the "return to tank" line run. I used a Mr Gasket and removed it, almost caused a fire. They suck, don’t buy them.
My Crate 355 SBC starts right up sounds and feels like a 454 😂 I’m not an engine LS swap dude I’m good with 10 mpg city 13 mpg hwy 32 gallon tank my K5 is loving that 91 octane she does well and I like to keep her vintage status feeling like Gucci
( They don’t make em like you no more ) 🤣
New to your channel. Love your subject matter and detail. Thanks for having me.
Hey brother, I’m having a frustrating regulator problem I hope you can help me out with. I recently installed an Aeromotive deadhead style fuel pressure regulator on my SBC 350. Mechanical pump and 650 Holley DP. It works good, only issue I’m having is if the truck sits for more than 3 days the regulator seems to be stuck closed and completely blocks the flow of fuel to the bowls. The fix is backing off the regulator adjustment screw until PSI is near zero, then I’m able to get fuel to the bowls and reset the psi to 5.5 psi and all is well until it sits for another 3 days. Rinse and repeat. Any idea what the issue might be ??
With that holley deadhead regulator you have on the Chevy, can you add an orifice fitting at the 2nd outlet and make a return line if needed? I’m asking because I have the same holley deadhead regulator, and I’m getting vaporlock, and I can get a .063 orifice fitting for 15 dollars.
Question for ya. I have a Holley 1-4psi deadhead regulator. I ridded my Jeep 258 engine of the mechanical pump, the new ones are junk. I have to install a Facet 12-15 psi electric pump because of the location of the pump and I need a lot of dry lift. Will 12-15psi into the deadhead regulator hurt the pump? Do I need a return, and if so, will a return style filter cause too much pressure fluctuation? I cannot find a bypass regulator that will provide the 3psi my Weber carb likes.
Why do we run extra large fuel lines and then restrict the flow through a tiny oriface right before we need it. Seems counter productive.
If you’re using a mechanical fuel pump with a return line on it, can you use a dead head fuel pressure regulator, or would you still recommend a by pass version?
You need educated on fuel pressure regulators in real world applications.
Recommending these is way outside you’re element.
I have the same engine and intake/carb set up. Can you guide me to buy the stuff you have on your GMC so I can do the same? Parts wise. Also I like the way you bent your hard fuel line.
Thanks.
Great videos! Very helpful to me for my Datsun 280 with a 327 SBC. I am wondering your thoughts on a fuel filter AFTER the regulator. I have a 20 micron before the pump and added a 5 micron between the regulator and the carb. Fits nicely but wondering if it affects the fuel system in any way vs between the pump and regulator like your diagram always shows.
Have a 468 big block, mechanical fuel pump, 540 hp to the crank street car. Would a dead end be sufficient for that? Thank you ✊🏽✊🏽
Gave you a follow on Rumble. Please post more up there.
I don’t know if you’ll know but my question is why did we not need pressure regulators back in the 60s and 70s? My Dad had a 64 GTO with a Carter AFB and it was piped straight from the pump. Design change?
Just put a new edelbrock 1405 on my 67 GTO. It had a old Carter on it and thought about rebuilding. After seeing a couple of videos including yours, I’ve decided to get a guage and a regulator because you have helped me figure out the host of my problems. Surging, hi idle. Dad was constantly adjusting the idle and or the timing. When he was done with the car, I aquired it and went with electronic ignition, new plugs and plug wires. And guess what after a couple of days trying to dial it in, I still have some surging. Not as bad though. I even switched the vacuum advance from port to exhaust. It does run better on exhaust. You have helped to figure out why. Just seen the video’s and will check it out just as soon as I can sneak into the garage.
Nice intro video for the most part but no one ever talks about using a return regulator to allow the use of an intank efi pump with an engine that has been converted from efi to carb. I unfortunately ordered a return regulator that came with no directions so my project is on hold till they get back to me. Made me a bit mad but it is what it is. Im dead in the water till I have a clue how to install and set this thing up.
Hi, its me again 😉 I read a lot until now …. but maybe you can help here again. Can I use a return style regulator as a dead head regulator? My system is a dead head but I dont want to install a return line so far. But if I can run a return style reg I have the option to do so. Thank you for your advice.
Hey Brother,
I have a 1974 Chevy Camaro with a 350 Engine. I have recently been having trouble with it and believe it has to be fuel related. Thus, I am wanting to change out the fuel pump, and add a pressure regulator as it currently does not have one. I have a Holly brawler 4 barrel Carb with an electric choke. Its dual fed and the current pressure gauge that is on the dual feed fuel log/line is not working. So I want to replace that. Is there any specific fuel pump, pressure regulator, filter, and dual feed fuel line/log with a gauge that you would recommend. My knowledge on these old cars and Carbs is little to none but I am trying to learn as certain things need done. I don’t mind spending money on quality parts. I just do not want to get in over my head. Thank you for all the great information you provide! If there is an easier way to contact you let me know. Thanks again!
Do you have to use a regulator for a stock setup?
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I purchased a deadhead, Holly pressure regulator part number 12–803, and I’m running a mechanical fuel pump. My question is, The fuel pressure regulator has two outlets. Can I run one of the outlets to the carburetor and put the gauge on the other side of the regulator?
The cars of 1968 Plymouth GTX, 440 with a mechanical fuel pump.
Hi there, I have a fundamental question here. I installed a fuel pump which is regulated to 7psi and there is no need for a regulator so far. BUT I installed a regualtor anyway because I wanted that return line. Now I’m seriously wondering if the regualtor ever allows gas to flow back because the pump actually doesn’t produce enough psi. I’m somehow making a mistake here. The return line isn’t always open, is it. This only opens at a certain pressure, which my supply will probably never experience, right?
I have a 74 C3 with 350 small block. It has a mechanical pump. The pump has a return to the gas tank already. If I run a pressure regulator with the return, how should I run the return? Should it be a separate line all the way back to the tank, or can I T into the return at the pump?
Great video. Is it really necessary to spend 100+ for a regulator when there are Holley ones for 30 that have good reviews? Thanks!
I was hoping you could help as I can’t seem to find an answer for this anywhere.
I have a 78 power wagon with a 440 and a 1806 edelbrock carb. I live in California so smog tests are an issue. That means I have to run the charcoal canister to pass smog. The problem is, the fuel return line is used by the charcoal canister, and it’s fed by the vent at the top of the carb (which I have to drill/tap to install).
Am I correct in assuming a “dead head” style regulator is the correct choice? Because I don’t see how I can run a return style with the charcoal canister.
My other question is in regard to location. Because this is a big block Mopar, the distributor and the coil are located right in the way of where I would want to mount the regulator. So, would it be ok to mount the regulator on the fender well and plumb a line to the carb?
FYI; I’m thinking of mounting it on the passenger side fender well because it’s the only place that allows me to use the shortest hose length for all lines needed; Being the lines from the manual pump to the regulator and then out to the carb. I’m trying to avoid pressure loss due to hose length as this is a low pressure system. And to be honest, I don’t even know if that’s an issue I’m likely to face. Just trying to cover all my bases.
Thanks!
super
I want to purchase a regulator and gauge for my 56 Chevy. I’m running a Carter fuel pump outside the tank and an Edelbrock 1405. What can I buy and where can I mount it to be aesthetically pleasing?
great video, but in few words : what are the benefits of a fuel pressure regulator ? Thank you
Great 👍🏿 video definitely helped me 💯
Would there be a reason why someone would deadhead the other end into a foot length of hose then to a plug, opposed to just plugging right at the outlet side of a regulator?
Heres a question im not seeing in the comments. Say im running an in line fuel pump in the engine bay, pulling from the tank. And i run a return style regulator to the carb. Does the return line have to go all the way back to the tank, or can i just splice it into the line the pump is pulling from?
Hey what regulator would you recommend for knocking down the pressure of a return style efi, to a return low pressure carb setup? Thanks!
I am, swapping out mt TBI for a carburetor. I will be installing a fuel pressure regulator. I will obviously be running muck less fuel pressure. Do I need a return line back to the tank?
I have a mechanical fuel pump on my subconscious. It has a bypass circuit. Should I install a by-pass regulator too?
Are there electric fuel pumps that work well when placed far from the tank like under the hood?
I have a mechanical fuel pump, 7-9 psi, but the cheap holly pump you reccomend say specifically not to be used with a mechanical fuel pump. Do you know why? Or can I use it anyway? And is there a regulator I can use with a mechanical fuel pump?
Dont know if anyone has asked but what is the small hole near the top the regulator? Its a summit brand fuel pressure regulator.
Amazing video as usual. Could you please give the size of the fittings used. Thanks
Thank you, this answered a lot of questions!!
Do not buy the $50 Mr. Gasket fuel pressure regulator. It leaks fuel and will not regulate lower than 9 psi. Public service announcement.
Question: how close does the dead head style fuel pressure regulator need to be to the carburetor? If heat is an issue, could you mount an electric fuel pump and regulator under the vehicle to keep it cooler? Obviously it would be a pain to adjust the pressure, but at least it wouldn’t have heat issues. Or does it have to be close to the carb? Thank you for the helpful video
What are your thoughts on the knob style regulator ?
Running a stock mechanical pump with a edelbrock 1406.
¡Hello! I am looking for a Fuel pressure regulator with return for a chevrolet S10 1991 TBI v6 4.3 engine… with the modification from tbi to carburetor… could you help me with the choice ?… thanks
Excellent teaching! thanks… Question: I’m building a carb 351W to install in a formerly EFI dual tank truck that has high pressure pumps with return lines. Can I essentially leave the truck’s fuel system alone and let it feed into a bypass regulator (and then into the carburetor) to reduce the 45-50 psi down to carburetor requirements, or is that beyond the pressure differential a regulator can handle?
Hi, I have a question. Is it important that the regulator is installed before or after the fuel filter? Thanks
Thanks for the video! Where do I get all the fittings that go in between the pressure regulator and the liquid filled gauge and the fuel filter? Thanks