How to Choose the Right Fuel Pressure Regulator
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- เผยแพร่เมื่อ 18 ก.ย. 2021
- 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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One of the most overlooked items of a fuel system with our classics and I find that because of folks simply not knowing why they are so important. This video sums that component up perfectly. Great video!!!
Thank you sir. Very much appreciate your feedback!
I agree
Really appreciate the time to explain all this stuff. No one likes spending money to buy stuff that really doesn't work as you hope.
No doubt. Made enough of those mistakes and I’m sure I’ll make a fee more. Thanks for watching!
Very informative! Great job 👍
New to your channel. Love your subject matter and detail. Thanks for having me.
I’m glad it’s been helpful! Don’t hesitate to ask any questions or share your thoughts. Always happy to help if I can.
Great video, with great information!
Thank you sir! Appreciate you stopping by!
Great 👍🏿 video definitely helped me 💯
Great info thanks for sharing
Thank you sir! Appreciate you stopping by!
So when are you going to have time for me to teleport you to my garage? you can build my drive train for me! Lol
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.
You’re working through the tuning process! Sometimes it’s a little trial and error, sometimes you can make more informed decisions. Having a regulator is a great decision. If you have a very aggressive cam profile, switching from timed to full manifold vacuum is a good solution. Or it just means you’re masking another issue. Not enough timing, vacuum leak. Keep working though it and you’ll get it dialed in!
Still trying to decide which regulator is right for me.
I have a mechanical fuel pump with a return line from it. I'm guessing there is no need for a return line from the regulator. I'm perty sure the problem I had with the old carburetor was too much fuel pressure.
I've seen multiple people install bypass regulator after the carb. What's your opinion on that? I want to know the correct way lol
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.
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!
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?
Yes. Just use a good regulator that was made to take that pressure down to the level the carburetor uses. No problem at all.
I'm just now looking for a good fuel pump and regulator. Watching video now! 😁
Nice! Let me know if you have any questions.
@@MuscleCarSolutions Thank you. I'm currently building a 5.7 350 vortec engine pulled out of a stock 99 tahoe, which made 255hp. But I'm adding, long tube headers, wieand high rise air gap intake manifold, same exact one that's in Engine masters that matches the Elderbrock RPM PERFORMER air gap.
I'm converting it to a 4 barrel elderbrock carb 650cfm with 1" carb spacer. Everything else is stock. I'm hoping for 350-400hp. Just a good daily driver for my 1970 Chevy Nova.
I was thinking of getting the red holley pump and regulator for my set up. What do you about all that? 😁😁😁 it's all sitting in my garage except the fuel pump stuff.
@@obsessivegarage921 going to be tough to hit that number without a cam and compression change. If you’re making a daily driver, the Holley red/blue pumps aren’t the most dependable. Usually quite noisy. I’d look at an in tank solution to the pump. A little more money but a lot more dependability and something you can use if you upgrade to EFI in the future. amzn.to/3nOChpa
Great info. I needed this info for the C10 454 swap as it has no provisions for a mech fuel pump. Thanks
Thanks man! Glad it was useful!
I just did a 350 swap in my S10 Blazer with a brand new Edelbrock 650 headers distributor the whole nine I spent way more time and money than I thought I was going to because I got OCD and wanted everything to be top notch and beautiful but when it came to getting rid of the in tank fuel pump from the TBI to go to the carb then I had to find a fuel pressure regulator that would also work correctly with my return line so I had to get a holly return style / bypass regulator and Edelbrock inline fuel pump the micro Edelbrock fuel pump but anyways I have no provisions in my block for a fuel pump either and that makes me mad now I'm having to piece together a fuel system that works correctly when I could just put a mechanical fuel pump in and be done with it on next motor I build will not be a TBI block
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.
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
I mostly use Fragola or Russell.
Great video. Is it really necessary to spend 100+ for a regulator when there are Holley ones for 30 that have good reviews? Thanks!
You’ll get comfortable with the cost you choose or you’ll spend the money again on a better one. On fuel system stuff, I rarely go the cheapest route, no matter what the reviews are. As long as it doesn’t leak on you, you’ll be ok when it fails.
Hey what regulator would you recommend for knocking down the pressure of a return style efi, to a return low pressure carb setup? Thanks!
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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.
I put parts used in the description of every video if that’s helpful for you
You said in the vid your regulator on the GMC was a holly. The one in your description is no longer available and also is listed as an edelbrock. Any advice there? Also where did you get all of the little fittings to make all of it work together?
Gave you a follow on Rumble. Please post more up there.
Love to. It’s just a much smaller platform and practically no one sees anything there. Would love to see it grow!
@@MuscleCarSolutions yep. I’ve decided to leave YT and try Rumble for a bit since YT is openly manipulating what we see based on demographics of creators rather than content. Glad I found your channel for all the things I’m curious about fixing/tuning on my 1987 GMC K15.
I have a mechanical fuel pump on my subconscious. It has a bypass circuit. Should I install a by-pass regulator too?
great video, but in few words : what are the benefits of a fuel pressure regulator ? Thank you
It gives the carburetor exactly what it needs to deliver to the engine exactly what it’s asking for. It’s another adjustment on a system that doesn’t have many.
Can a deadhead regulator be plumbed to function as a return style? IE: feeding in on one side, opposite side out to the carb and using the bottom feed to return as a pressure relief?
Short answer, no.
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
Yup. Before you buy anything else, This might be useful for you. th-cam.com/video/Hy4s9B43YM0/w-d-xo.html
i thought that might have been my problem i just had my engine rebuild and converted from tbi to carb,,when i put my brandnew edelbrock 1406 carb on im getting popping backfire out my exhaust i got my regulator set right at 6psi ..at frist i did have 5and 7 wires cross and my carb base gasket was leaking i fix them problem sense i did that the truck will run but i still got that backfire popping out the exhaust.
That’s a timing issue. Could also be fuel but given what other issues you’ve had, I’d start there..
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.
I'm certain Aeromotive makes one to drop the pressure on a EFI or high pressure pump down to that range. At least the the 3psi level.
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.
No. The gauge needs to be in the line going to the carburetor.
Really appreciate your knowledge and you showing how everything works. I’m waiting on my Holley Sniper master kit to come in, my question is do you think I should set up a regulator even though Holley has there internal regulator set at 58.5 psi, or at least a good Quality fuel gauge? Keep the videos coming 👍 How can I get a t-shirt & some stickers? Thanks Timmy
The good thing about efi systems is the ability to monitor fuel pressure easily through the sensors and the dash or app that’s used with them. I’d monitor it through that to verify the pressure. Thanks for watching! Link to my merch is in the video description or click here! muscle-car-solutions.creator-spring.com/
Thanks so much for getting back to me, going through all your videos 👍
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?
The TBI should have a return line, yes? I’d use it. Will keep the pump happier if that’s how it’s designed to operate.
What are your thoughts on the knob style regulator ?
Running a stock mechanical pump with a edelbrock 1406.
Not a fan. Usually in the cheap end. It’s one of the areas where spending the money is worth it.
I always used the old Purolator Brand Dial Regulators on my Edelbrock carbs. Never had a problem. Now Mr Gasket and Spectre make them, I can't personally speak for the quality of those ones
Amazing video as usual. Could you please give the size of the fittings used. Thanks
In what? Some things take ORB fittings, some are NPT.
Sorry for being so vague… I’m trying to set up my fuel pressure regulator,but I really like the set up you have in this video. To be honest I’m not quite sure or knowledgeable on ORB or NPT fittings.
If you go with the cheap Holley regulator like I have it should be a 3/8” NPT. I think the link is in the description so you can follow it and download the instructions or get the part number and go grab the instructions off the Holley site to verify that. I’m 95% sure that’s right..but go check it anyway before you order anything.
Thank you very much Sir.
@@jesusarriaga8761 anytime! Just hollar if you have any questions. Happy to help if I can.
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?
Two things. Why didn’t we need regulators back then? We did! They just weren’t readily available and we hadn’t learned that having that adjustment to pressure directly affects flow. Had we known, and had we had more options in pumps, the adjustability would have gotten much better. Today, with the poor quality fuels and more volume needed, having a regulator allows the user to make the decisions. Not some analog non adjustable system. But let’s face it. Go watch a 100 videos of people putting on new carburetors. Likely less than 10% will actually TUNE it.
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?
The aesthetics is all on you. I have a few different regulators listed in the video description.
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.
You can, but not for very long. Don’t play cheap games with fuel and safety. It’s not worth what you think you’ll save. If you want a deadhead regulator, use one. If you want a return style, use one.
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?
Up to you. I prefer the return style but depending on what you’re asking of the system a dead head works just fine. My GMC is a low HP (under 450hp) and it’s got a dead head regulator.
@@MuscleCarSolutions it’s a 1967 Pontiac Catalina 400 2bbl, but I’m swapping in a 4bbl Holley 650 on an Edelbrock performer intake.
@@FranksModelAviationWorkshop depending on what you’re asking it to do, I’d be perfectly ok to run a dead head on that set up.
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?
Return back to the tank from the regulator.
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 ) 🤣
What do u personally like for edlebrock carbs as far as pressure?
6psi and adjust down from there as needed.
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
Close to the carb. Heat is generally not an issue unless it’s laying directly on the intake, which I don’t think I’ve ever seen.
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
Dont know if anyone has asked but what is the small hole near the top the regulator? Its a summit brand fuel pressure regulator.
Don’t know. I don’t own any of the knockoff summit regulators.
super
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
Lots of factors there. Nothing wrong with your set up, but it’s easy to test by going regulator last right before the carb and run the return line back to the tank from it. See if that corrects your pressure issue. I haven’t used that regulator before but it’s ok. Easy way to determine which side they want you to use is to hook it up both ways. I’m assuming your bleed side goes to the carburetor, but try it both ways and see which one works best.
@@MuscleCarSolutions thank you for the reply . I’ll try regulator before carb to see any difference..tried regulator inlets both ways .. jet side towards carb and reverse.. same outcome
How to contact you? I have a 1964 Honda s600 with Mikuni 4 carbs (not the original carbs) for the car. I have too much fuel coming into the sparkplug. I need a fuel regular workout the return. Any help would be greatly appreciated.
I would start with how much pressure those carbs are supposed to see and pick a regulator based on that.
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.
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?
Can’t think of a reason, but I also stopped trying to figure out stuff like this. Unless they couldn’t find a plug.
@@MuscleCarSolutions how has the aeromotive gauge held up?
@@josephfriedrich9792 they’re flawless. I can’t tell you how many cars I’ve put them on. Always work, always correct. It’s all I use.
@@MuscleCarSolutions good to hear. I've always had dry gauges in my bays, but I keep running across them. Was about to buy another holley gauge, but going to give this a try.
@@josephfriedrich9792 I’ve run just about every brand on the market. For sure I’ve personally had the best luck with the Aeromotive ones.
i have a bypass12-887 i have a vacumm port outlet on it do that line have to be hook up
It’s a boost reference port. Do you have a turbocharger or supercharger on it?
@@MuscleCarSolutions know
¡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
Yes. The ones in the description will work.
@@MuscleCarSolutions Thank you!
Is it better to choose with bypass?
Do you have to use a regulator for a stock setup?
100% of the time I use one. It’s another adjustment point. Stock fuel pumps are wildly inconsistent on the pressures they put out. You never know until you measure it and if your going to do that, you might as well give your ability to adjust it to what the engine is demanding.
@@MuscleCarSolutions thank you! I’m trying to learn as I go.
@@kosworkshop for sure! We all learn something new each day when working on these classics!
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!
You can do whatever you’d like. If you’d rather run a return style regulator, you can. It’s not hard to add a return line to a stock tank. I did a video on that! If you’re rather run a deadhead, you can do that too. Just mount the regulator away from a heat source and put it in the best location. Mourning on a fender is completely acceptable if it’s away from a heat source and safe.
@@MuscleCarSolutions oh ok, great. Is it ok to plug the return portion of the regulator I have vs buying a dead head? Essentially turning my return style regulator into dead head?
@@lamontcranston8181 that’s not how a regulator works. It’s one or the other. If you have a return style regulator you have to run a return line. Or buy a deadhead if that’s what you want.
@@MuscleCarSolutions Thank you very much for clearing all that up for me. I really appreciate you taking the time to help me out. Take care!
@@lamontcranston8181 you’re making a good choice on the regulator. One of the better tools you can give yourself. Best of luck with it!
Hi, I have a question. Is it important that the regulator is installed before or after the fuel filter? Thanks
Oh I did a whole video on pressure drop and what happens when the filter is after the regulator. Yes, it matters!
Ok, great. Is it this one here or another one? the preowner of my 65 Camino installed a regulater before the fuel filter and Iam wondering if the leck of response that I feel happens because of that. Thanks for your feedback again
@@fuelbasti could be. I did that video to show that if you put a filter after the regulator and before the carb, you will experience pressure drop. That’s important. We want the carb to see the exact pressure number. The filter before the regulator is ok. The regulator should be the last thing in line before the carburetor. If you want to see that video, I’ll link it.
@@fuelbasti here is that video; th-cam.com/video/nkctnQcz55w/w-d-xo.html
@@MuscleCarSolutions Thank you very much for the link 👌
What I also wonder is whether a regulator is really necessary for my 350 performer. Or just nice to have.
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?
That’s a fallacy. Controlling what the carburetor sees for flow and psi are extremely critical. A regulator is always needed. Why? So YOU have control and can make changes when the engine is asking for them. Pumps produce FLOW. Psi is an after effect of flow. The return line takes when the regulator gives it. The question that needs to be asked here is, what is your pump rated in flow? GPH or LPH and what is that number?
@@MuscleCarSolutions 90 GPH at 5 PSI. But under what circumstances gives the reg the return free? I mean when I set the reg at 5psi but the pump can just reach 5psi the reg will never open, or?
@@fuelbasti the regulator operates independently of the pump. When the regulator needs to send fuel back through the return, it does. It either goes to the carb or back to the tank.
@@MuscleCarSolutions means at a certain pressure? Or what do you mean by "it does when it is needed"?
@fuelbasti you’re way overthinking this.
Are there electric fuel pumps that work well when placed far from the tank like under the hood?
For what type of application?
@@MuscleCarSolutions Carb.
@@SOU6900 the only issue is the distance from the tank. It can’t be an easy gravity fed pump. It’s got to be able to pull from that distance and maintain volume and pressure. Do you have an application that you’re concerned about a pump near the tank? How about convert to a pump in tank set up?
@Muscle Car Solutions I'm really just asking out of curiosity is all. Having dual tanks I figure would be a pain in my opinion to try and set up with in tank pumps. Unless a pump would work just after the tank selector valve on both my squares.
@@SOU6900 ah. Yeah the dual tanks are always a challenge. A good pusher pump after that junction operates just fine. Usually low and frame mounted and they have a decent service life. Rarely run into issues with that type of set up. Regulator up front like I have in my fuel system diagrams. Can be made to service whatever level of HP you’re making. I’ll always vote for pump in tank but for sure in your situation, it becomes extremely expensive!
GooD 2 KnoW( 411 ) MooN is SHiNNE-iN AnD ThanKs ALoT °H°A°R°D°
Can you run a bypass regulator with a mechanical fuel pump
Like a holley 12-887 BP reg
I wouldn’t advise it. Mechanical pumps aren’t meant to operate like that. Switch to an electric pump.
@@MuscleCarSolutions would a edelbrock micro electric pump work with a BP reg
@@deerslayer5863 what are you looking to accomplish with that system?
@@MuscleCarSolutions 375hp daily driver
You need educated on fuel pressure regulators in real world applications.
Recommending these is way outside you’re element.
*your. Give me some examples.
Hey Bone, am i shooting for 3 1/2 pounds on the 1406, would you like to trade stickers
3.5 is a little low for pressure. You’ll know if it’s not enough if you’re in more aggressive driving and it falls flat on it face. Most of the time I don’t go less that 4.5 for the street driven stuff. All depends on how you’re driving.
@@MuscleCarSolutions thank you 🙏
Must have been thinking of me VW
Maybe! Those are pretty low pressure fed aren’t they?
@@MuscleCarSolutions yes when I said 3 1/2 pounds I was reverting back to the old days with the Dune Buggy , but I’m glad I asked so I will know where the Edelbrock is supposed to be😀