5.0 fuel pressure regulator

[Ummduh]

At what point does the stock fuel pressure regular on a fox/sn95 5.0 stop working? I can't find shit for information, just a bunch of people that had to out them in to try and get their stock tunes to run their cars.

I am putting an aeromotive stealth 340lph in tank on a single turbo potentially e85 deal. Not sure if the stock regulator will function or if the pump is going to over power it?

I don't need to manipulate stock pressures, it just needs to be functional. I'm running megasquirt.

 

[665.0coupe]

How much power do you plan on making? If you are thinking of running the stock regulator, does that mean you plan on running the stock fuel lines?

With a single turbo and e85 you have the potential to make some decent power. E85 will take more fuel to make the same power vs straight gas. My guess is you will be at the limit of the stock fuel line size and probably the regulator as well.

My next thought is, since you are putting a single turbo and e85 on this thing, why do you want to skimp on the fuel pressure regulator?

What does Aeromotive think?

 

[Ummduh]

How much power do you plan on making? If you are thinking of running the stock regulator, does that mean you plan on running the stock fuel lines?

With a single turbo and e85 you have the potential to make some decent power. E85 will take more fuel to make the same power vs straight gas. My guess is you will be at the limit of the stock fuel line size and probably the regulator as well.

My next thought is, since you are putting a single turbo and e85 on this thing, why do you want to skimp on the fuel pressure regulator?

What does Aeromotive think?

My goal is 500 to the tire. Chinese 72/68 turbo. Turbonetics t72 clone. Mostly not blowing it up from my own tuning is the goal.

Fuel lines are -6 but stock rails. Sn95 rails which I understand are better than older ones.They should be capable from what I can tell. 62lb Injectors.
I should run out of pump on e85 around the same time I run out of Injector.

This is ultra-budget.

I've just heard of people saying that higher flow pumps can over power stock regulators, but I can't find anything to back that up. Just a lot of people that thought they needed it.

 

[665.0coupe]

I would say for sure that aftermarket pumps could overpower the stock regulator, however weather it will in your case is hard to say.

The fuel pressure log will tell you. If you can't keep the pressure down where you want then you have a restriction that needs addressed. I ran into this one time on a carbed engine. We thought the aftermarket regulator was bad because we couldn't keep the pressure down. We were running a smaller return line than feed line and the return line was causing the restriction not the regulator. Same thing will happen for you if the regulator is to small or the fuel rails are to small.

I would call Aeromotive and ask them. I'm sure someone else has done something similar to what you are trying to do.