420A Fuel pump options for factory returnless system

[Mitsubi-doo]

I'm looking at a walboro 190 and a 255. And a few other pump kits.
What will work without redoing the fuel system?

 

[VelocitàPaola]

Either of those should work. They're similar enough to the stock fuel pump--you shouldn't have to change anything else in the fuel system.

 

[Mitsubi-doo]

Thanks. I did order a new factor fuel pressure regulator becuse it's original to the car also. Just don't want to run into a fuel volume issue

 

[BLACK'98DSM]

While it will work, the 255lph will raise your fuel pressure. Unless you're trying to increase the engine's airflow, that is overkill and will result in a rich burn. That's the pump I previously suggested because you mentioned modifications. With just intake and exhaust, the 190lph is more than enough. If you're planning for internals and machine work, or a turbo, that's where you'd want the 255lph. I had a high compression engine with considerable camshafts and port work. Even then I probably could have run a 190lph. But I wanted to go larger to leave room for tuning and further airflow increases.

I maxed out the stock fuel pump before I had a way to tune. When I installed the 255lph, it was running very rich under load. I had to not only increase airflow but also dial in the injector dead times to get a desirable AFR. Maybe I wasn't clear enough in my other post but it was still a great references with actual numbers that, along with this, should lead you forward.

 

[Mitsubi-doo]

While it will work, the 255lph will raise your fuel pressure. Unless you're trying to increase the engine's airflow, that is overkill and will result in a rich burn. That's the pump I previously suggested because you mentioned modifications. With just intake and exhaust, the 190lph is more than enough. If you're planning for internals and machine work, or a turbo, that's where you'd want the 255lph. I had a high compression engine with considerable camshafts and port work. Even then I probably could have run a 190lph. But I wanted to go larger to leave room for tuning and further airflow increases.

I maxed out the stock fuel pump before I had a way to tune. When I installed the 255lph, it was running very rich under load. I had to not only increase airflow but also dial in the injector dead times to get a desirable AFR. Maybe I wasn't clear enough in my other post but it was still a great references with actual numbers that, along with this, should lead you forward.

I went with the 190, I was struggling to really figure out if wanted the extra volume with the 255 and do more mods now or find something that's good for the time being.
I think a 190 with my set up will be good and shouldn't have to adjust much of anything at all..
I just want my car to not attempt. To break down on me when I drive it for a week ..
I just want to make a well educated decision

 

[Mitsubi-doo]

Hey everyone I just wanted to let everyone know that the walboro 190 with a new oem regulator and filter worked flawlessly and i didnt have any issues out of my car, or any rich concerns.
I felt the 255 was too much right now for the current mods and would cause issues unless I did more upgrades to correct it.

So if your mostly stock and want a good fuel pump a 190 walboro is the way to go.

I may of regretted it because im already collecting turbo parts , but I want the car reliable as I drive it for now.