EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable (30-70PSI)

This unit is a suprisingly good value, I give this thing high marks for the 70ish bucks it cost me, however...Let talk about what this is and isn't. This IS a fairly well engineered (copy?) AFPR, its holds it's setpoint well, it flows a good amount of fuel and it works well in boost. For the average tuner this FPR will at least eliminate a rather annoying variable (stock FPRs). This isn't a high dollar unit, I dont know if I would trust it to regulate over 500hp or 1 bar of boost but your mileage may vary. It is very likely that it will NOT survive exposure to alcohol, don't even bother trying it, buy a high dollar proven alcohol rated AFPR if that is what you are up to.I installed this on the return side of a Ford 300 I6 Turbo with Ford fuel rail to AN adapter fittings, I simply gutted the stock regulator and welded it back together to act as a passthrough to this AFPR. I set the reg to 42 PSI, hooked it up to a vac/boost ref port and sent it. ZERO variation in the tune, VE numbers look way better, proper flow and pressure are now being maintained on both sides of the injector under boost. No leaks, overall happy.Things to note:TAKE IT APART, make sure there are no shavings, rolled orings or a bad seals, don't be a noob and file a bad review because you didn't do your job. this goes for any Chinese aftermarket car part (BOV, WG, etc.).Double check your work, torque all of the fasteners to a standard specification.Be gentile with the provided fittings, they are made from low grade Chinesium, they do work fine. The supplied hose is meh but I used it anyway and it's fine.Be smart, if you dont know what you are doing, talk with someone who does, dont just install this on your car or truck because you think it's cool. If you dont have a reason to install an AFPR then dont, the stock one is going to work better in your application.NO ETHANOL! You didnt read the whole review, STOP!

Quality product , easy installation

The FPR I bought for ITB work failed the vacuum test.I bought an EVIL ENERGY FPR with a pressure gauge on Amazon because it seemed like it would take too long to get it exchanged from UK to Korea.However, the EVIL ENERGY FPR also failed the vacuum test.The cause was that the vacuum failed in the part in the photo.A rubber O-ring was used to prevent the vacuum from leaking in the upper part.The quality of EVIL ENERGY FPR products is very good.However, product quality control (QC) is a bit disappointing.The pressure control upper part needs improvement.

I installed this in a Jeep Cherokee I plumbed a fuel cell to. Running exclusively evil energy just to give them a shot and stay in the same ecosystem. This will be moved in a few months as I redesign the suspension but for now, it’s working great where photographed. Holds 50 PSI at the rail at idle and WOT. This is a “dead head” design. So simple with the return out of the regulator.I didn’t use the gauge that came with the regulator since I’m measuring at the rail. It did leak horribly where the gauge would plug in and then I read the directions… thread sealant required. No further issues.The directions say not to plug the vacuum port if it isn’t used. That’s a little disappointing as mine will always live under the body. I’ll run a line at some point to the original fuel door. As there isn’t a vacuum, it being opened shouldn’t matter, but I don’t want water to collect in there.

The product do not fit my car, this pressure regulator did not come with the proper fitting to attach to the gasoline rail, there is no way I can use it. Wrong advertisement, its not suitable for 1997 4runner 3.4L . Also does not look like a high quality product, the fittings feel cheap, but I couldn't use it anyways.

Run these on derby cars anywhere from 30 psi up to 80 with no issues works great. I’ve bought Holley and others and this one works better.

Product looks great and the accessories it comes with have no issues sealing. I wish it came with more hose. And not pre cut. The main issue i had was the regulator would not hold pressure. It would not adjust above 30psi and would drain out in seconds.

I used this to build my VR6 12v Turbo setup, and it works, but just enough. I've had it for a few months now.Pros:- Works well when the car is running and reacts to boost pressure well. I've ran it with 12psi so far.- Value is great compared to more well known brands.- Comes with some basic hardware to help with installation.- Didn't find any metal shavings inside it.- Adjustability is dead simple.Cons:- Does not hold pressure if the car isn't running. After a bit of the car sitting not running, it loses all pressure. This means it will cause the car to fail to start up the first time, or stumble.- Included braided AN hoses while thoughtful, are useless.- Included AN fittings work but I would upgrade them to better quality ones.- Mounting brackets could be a bit more creative for easier/better mounting. I had to weld mine to allow it to mount properly.I'm still using this FPR but plan to upgrade to something like an areomotive soon. I don't like that the car can't be instantly started if it's sat for more than 30 minutes. I did disassemble mine after I got it, and while I didn't find any metal shards in mine it's still good practice when buying anything cheap like this. As other reviewers have noted, the SS braided hoses that come with this kit aren't really useful, and are oversized, I'd reccomend ordering more AN6 hose instead. I got a 10ft roll and it worked fine for me and my Jetta.TL;DR: It works, just plan to upgrade.