I've owned my Cuda for 5 years now, but I'm new to boost. Admittedly, I'm not the most savvy person when it comes to diagnosing issues, and since I moved to a new city for my job I lost my support group and now have a parking garage where I can't tinker on her. With that said, it's pricey to have a shop test and tune this thing all the time at 125 dollars an hour to figure it out. I'd like to get some ideas to check prior to dropping her off. Engine is a 440 - 505 stroker. should make around 425-450 NA with the compression drop.
I wrote about my new engine in a prior thread, and that it's procharged. Really happy with it, but I'm noticing some inconsistencies with my fuel pressure. Sometimes it runs strong, other times it will build to about 3 PSI and the fuel pressure will drop from 60 to 20. I immediately let out. I've tried keeping the tank full, but does not seem to matter. sometimes it will work and pull other times it won't. no rhyme or reason to it that I can figure out. It's hard to watch air fuel and fuel pressure while boosting down the highway. I'd like to get this figured out so I can get to the track and test her out.
Fuel tank is fairly new, 2 years old and an in tank kit I got from Holley. I'm running a Holley 510-12-167 in tank pump rated for 1200HP 525lph.. My engine should be well under that especially at 3-6psi which is when I see the drop.I managed a few logs and the sniper was calling for 400 LPH of fuel when the pressure dropped on my gauge. Pump should be able to handle that. I have a Aeromotive boost pressure regulator, and a 100 micron fuel filter that I just put in today. I was hoping that my old filter was the restriction. I thought that did the trick, but about 30 miles into my drive the PSI was dropping again under low boost. (inspection of the old filter did not have any clues, looked clean) Holley sniper is feeding the engine. I'm open to any other suggestions. There was an option for a Aeromotive fuel filter for about 80 dollars more, but the speed shop didn't think I demanded that kind of flow based on my build. Voltage is 13.4 on the sniper, so I"m assuming the rest of the car is strong too. battery is trunk located so my assumption is the pump is tied directly to it. I did the original fuel pump, but had it changed out with the Procharger so not positive, but I'd imagine it's better than how I had it. Any thoughts are appreciated.
I will note that it's an absolute gas hog. 7-8 MPG. Maybe I need more flow to feed my inefficient engine than say an LS making the same HP? idk, just guessing. Air fuel seems decent from what I can see while driving. I'll also note that I'm running -8 feed and return lines.