EVIL ENERGY 6AN Adjustable Fuel Pressure Regulator EFI Bypass Return 30-70psi Black&Red

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!

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 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.

the product looks robust. Not sure it can withstand ethonal fuel.

Product looks good. Regulator gauge did not read pressure😭