Fuel Pressure?, Pump and Regulator Options

[stoneman30hotmail]

I have a 1.7L. The pump I have looks like this. https://www.lceperformance.com/ProductDetai...eUaAvWtEALw_wcB


Where I see it says it is 5psi and recommends a pressure regulator. But I don't see one.

I have this single carb.

How bad is that? Do I really need a regulator? What is going on without it?

Related is that the PO said they recently gave up on FI. But I assume no engine work was done.
I found this pump in the trunk.
Recommendations?

[brant]

your question about whether you need the regulator:

the needle and seat in the carb stops the fuel from flowing in.
they can stop and handle pressure around 3psi... sometime 4psi
but much higher and they will blow the needle open and continue to add fuel to the carb even if the bowl is full already. So the bowl can overflow and start a fire if the leaking gasoline hits the headers or another source of ignition.

[stoneman30hotmail]

your question about whether you need the regulator:

the needle and seat in the carb stops the fuel from flowing in.
they can stop and handle pressure around 3psi... sometime 4psi
but much higher and they will blow the needle open and continue to add fuel to the carb even if the bowl is full already. So the bowl can overflow and start a fire if the leaking gasoline hits the headers or another source of ignition.

Good to know. We did smell gas pretty stong after the 3 mile drive home a year ago. It's probably this and/or the open carbon canister lines. Not sure how much the PO drove it since the changeover.