hi guys,
i have a 2.0L ERL block with a ported head, CTR cams and GT3582. i'll start with the issue then the question. I am having issues with my 255HP and 044 inline pump. the 044 is making a lot of noise (didnt drive the car much after the fuel setup installation) and for some reason i read on here that the pump has either gone bad or its not getting enough fuel if it gets noisy. the other issue is fuel pressure drops. I did check alt volt(14.0-14.3v), 044 volt (13.75v) and walbro volt (13.62v) are all good when the issue happens. i tested fuel pressure at the reg and before 044. At the reg the fuel pressure is steady at 60psi after a cold engine start for 1 min then the needle starts to flactuate slightly, but goes unsteady and flactuates more between 50-52 when the engine is almost warmed up. as mentioned before voltage is all good all the time. when i check the pressure before the 044 the walbro gives 20psi and keeps increasing gradually (hmm). once the pressure before the 044 reaches 45psi thats when the 044 starts to get noisy, so that means there isnt any starvation, but what makes me go nuts is that the pressure keeps increasing and go up to 85psi before the bosch as if the 044 is not taking in the fuel delivery. once i get some boost on the engine the fuel pressure drops instantly to zero! what could be the problem here? i replaced my weldon with my old working aeromotive and the issue is still there. another thing i have noticed that the weldon doesnt hold pressure when the engine is shut off and aeromotive does. where could be the issue causing this?

i know the title says walbro 400lph and here is the question i wanted to ask if the problem above is not solved. is it possible to achieve +650whp with a single 400lph, ID1000's, weldon or earomotive fpr, -6 feed and return, bdl fuel rail, aeromitve filter? will be using c16. i am just trying to find a shortcut if the problem above is not fixed and like the simplicity of running one pump

 

On C16 mayyyybe. Itd be a stretch with those injectors

 

From your detailed description it sounds pretty clear like the 044 is failing. You have pressure building up in front of the pump and pressure dropping behind the pump when injecting alot of fuel.

 

Correct me if I'm wrong, but I think I remember seeing more than 650whp on ID1000's. Am I mistaken? I would think the 400 would be sufficient for 650whp, if a 255 is good for 450whp. I know I've seen that before. Again, I could be wrong.

 

https://honda-tech.com/forums/forced-induction-16/walbro-450lph-users-unite-3139056/

Some good info in this thread. Might be able to answer your questions.

 

made 699 uncorrected with id2000 and -8 feed on a 2 liter with e98/toulene mix

 

i am very disappointed cause both pumps are new from a good source and only have 400 miles on them.

 

i read about it somewhere too. do you think to reach my goal setting base fuel pressure to 50psi is sufficient?

can someone enlighten me if the ID2000's are C16 friendly? i read somewhere on HT that they are meant to be for ethanol use?

 

Interesting what kind of mix ratio are you using ?

If the pumps are from a reliable source contact them about warranty no? C16 is ok to use with the id2000's you wont care for the driveability on gasoline with those injectors though. Idle quality is **** with gasoline and really large injectors. Im running id2000's with E85 and they work great

 

nice thread but its about the 450lph!

 

did you upgrade the +/- wires for that pump? if yes what size gauge? did you upgrade the wires to the hanger pump socket only or did you upgrade the wires inside the tank that get the pump powered too?

 

They are the same pump. I dont even know why there are so many 'lph' names for it. It never even makes 450lph on the published graph

 

What i thought is that they came out with the 400lph, and that had issues with e85. So they made on e85 friendly (sealing the wires and such) and to make it "different" and noticeable to the public they called it the 450lph because it flows close to that at 13.5v. But in my eyes, both pumps flow the exact same.

 

What was the duty cycle? Base Pressure? Pump still have more in it? Just curious to the setup.

 

Its the same pump with different wiring and probably internal connections

 

Can you post a picture of your 044?