![]() This leads me to believe that I am over working the spring as it is letting pressure out then quickly goes back to stable then quickly back out again. Which looking deeper at it the return on it is also larger. My regulator is BIG and allows a lot of flow as it was designed to do CARB as well as PI. But after some more fiddling I believe I know what part of the issue is at least why mine is more pronounced. Welp the noise is back, still not as loud but still annoying. Here is the cabin, you can hear it at idle and see what it sounds like under light throttle. Here is the Gauge and how it looks at idle. I will then try it will the PI rail involved. I will adjust pressure and see how it does. Like the image below but without the PI rail at first. I am also going to re-route my setup so that the FPR is before the HPFP and on a single line removing the Y adapter. Jumper the Fuel Pump Resistor "thing on the frame rail that says hot don't touch" Was hoping this would keep the pump and full power and it would not pulse, it did not help. This did not change anything and might have made it more prevlant. Injectors: 1200cc fuel injector for MITSUBISHI EVO X 4B11T BOSCH style EV14 EvolutionĨan feed line from Fuel Pump to 8an-6an-6an Y adapterīypass PI rail but keep regulator "on Y goes to reg one Y goes to HPFP" ![]() With any throttle it will go away but returns at idle.įuel Pump: WALBRO HELLCAT 525LPH F90000285įuel Pressure Regulator: Aeromotive Universal Bypass Regulators 13301 It sounds like someone is drumming under the car and against the firewall. It is noisy but the car seems to run without issue. This pulse can be both heard and felt in the return line. The issue I have noticed is that the FPR is pulsing, it will pulse + or - 3psi at idle. I thought I was alone in this but it appears that and have similar issues. It should be done soon because I want that fuel system re-plumbed before the turbo swap & re-tune.I finished my port injection setup and I have noticed a strange issue. I'm plan to upgrade the turbo in the next couple months so I don't think it's worth the $ for a re-tune before I get the turbo because I'll definitely do one afterwards.Īnyways I'll try to remember to post an update when I install the FPD. It's still a little rough on the tip-in and tip-out, so it would be nice to see that smoothed out. I do think it could benefit from a re-tune though now that the plugs are correct, we would probably find all sorts of extra power and smoother performance all around. It's running much better now that I have the appropriate NGK SILFR6A plugs installed. So even during my tuning session I was running the plugs for a SOHC N/A motor, which are way bigger gap and about 1/2" shorter overall! It's really pretty amazing that my tuner never even bothered to take a look at the plugs, although I'm surprised he was able to tune the thing at all considering how far off the plugs were from spec. It turns out when I built the engine I accidently installed the wrong plugs. ![]() I was able to greatly reduce the surging I was experiencing by simply replacing the spark plugs. I'm waiting to install it when I replumb my system for E85 and relocate the filter to the trunk. I didn't actually put the FPD in yet, however I did buy the new in-line version Radium Engineering FPD w/ boost reference. Does anyone have a better solution for integrating dampers with my current fueling setup? What I'm thinking of doing is getting two of the Radium Engineering Fuel Pulse Damper Kit's and installing them as close after each rail as I can.Īnyone care to share their opinion on this idea vs just buying fuel rails that have provisions to mount dampers on them (such as the IAG Performance fuel rails). Wondering if maybe the location of these dampers is causing that surging to occur. ![]() That means they are no where near the rails and the second one is actually after the FPR, which I believe makes the dampers less effective. Then I had a shop install my Fuelab FPR just before they did the tune and they added two fuel pulse dampers right at the transitions between the hard lines and the AN fitting hoses. Last summer I installed the Injector Dynamics Fuel Injectors 1000cc w/ Top Feed Fuel Rails, using the I.D. I'm experiencing some surging in light throttle / low load situations. I'm interested if or how people are integrating fuel pulse dampers into their setups that use the Injector Dynamics Top Feed Conversion with an aftermarket FPR.įirst a little background information on why I'm asking. ![]()
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