The Y is directly up stream of the regulator and shows 12psi+


At the floatbowl, I get 2-3psi regardless of regulator adjustment.

When I did a free flow test of the pump (paxton 150), it took about 44seconds to fill a
1gallon container. And the flow was extremely bubbly.

Any ideas?

I guess Im going to have to totally redo the fuel delivery system. (with like a BG220 pump and weldin sump).

 

When you say the Y is "upstream" of the regulator do you mean before or after? Just want to be clear.

When there are bubbles in the fuel stream it usually means that there is a leak somewhere on the DRAW side of the pump that is bleeding air bubbles into the fuel. Such a leak can play havoc with the fuel delivery and pressure, too, in some cases.

 

the factory TBI fuel lines have 1 3/8" delivery and 1 5/16" return. I made both of them delivery lines by extending the return to the bottom of the tank. I then take both lines and Y them in to the single inlet paxton pump. Coming out of the pump I split them back to 2 lines and use that all the way to the engine compartment (which is where I saw 12psi at the Y in the engine compartment).

They then go to a single an8 line to the reg.

 

Well, I wouldn't have done it exactly that way but there's nothing really wrong with it. If you have 12 PSI at the Y after the pump but 2 at the fuel bowl you've jsut bent the laws of physics. heh heh

You sure you're adjusting the regulator the right way? As a test, remove the regulator and just go straight-line to the carb. You'll flood the snot out of it at 12 PSI, but you need to know if maybe the regulator is bad.

I'm assuming the regulator is after the the pump and before the Y leading to the engine, right?

FYI- I would recommend running a single line from the pump to right up near the carb, then put the regulator in-line, and the Y it into the carb's float bowls (dual feed Holley, I assume). Best to have the regulator close to the carb for multiple reasons which I won't go into here.