Boost referenced stock fuel pump

[kirkallen143]

Howdy Everyone,
Will the stock fuel pump (mine reading @ 5.5 psi now), if boost referenced, flow enough fuel to supply a max of 8 lbs of boost? Just wondering who here has actually done this with the stock fuel pump. Thanks for any replies.
Have a good one,

Kirk ' 73 bronco

 

[Mustangaroo]

I did it and it works fine on my 8 psi. boost! BTW it was a very easy mod to do to my stock 68 fuel pump!

 

[trashline]

i think fairlane 170 has a plan to drill the stock pump and apply boost to it. look for a tpoic named "budget turbo setup" there should be a pic in it

 

[XFlow_Fairlane]

yeah I was just gonna drill the stock hole open a little and press in a short length of tube (brass maybe) just so it is done a little nicer than epoxy (mine is only abut 3/16") pretty simple mod as all pumps already have the hole on them you just need a way to hook up the vac line to it

 

[gravelrash]

is it possible to take a couple of pics for me, of the boosted fuel pump.

 

[XFlow_Fairlane]

well on the stock pump there should be a small 1/8 or 3/16" sized hole on the oposite side of the inlet and outlet. simply drill this hole out a little (some are cast in) so that a short length of brass tube can be slide in there for a vac line to fit over.

I am going the fancy route and just drilling and taping for a 1/8" NPT so I can thread in a nipple and use that

 

[Anonymous]

I was going to tap 1/8" NPT but there wasn't enough meat. 30 minute epoxy works great to install the tube.

You can look at my thread "another turbo 200 nears completion" to see mine. I have had it to 20 psi but I am having carb issues right now.
(still no time to play with it, looks like I might close on that house)

 

[gravelrash]

lincs200,
i went to that thread of yours but cannot find a pic of your fuel pump. i cannot understand how it would work when the ford 6 fuel pump spring is exposed to the crankcase and not enclosed. in australia here there is a fuel pump off a xe-xf falcon that has a fuel return outlet (back to the tank)on the pump. i thought maybe putting the boost line there but would have to have a check valve to stop fuel being sucked up into the manifold under vacume.

 

[Anonymous]

The spring is indeed exposed to the oil in the crankcase, but there is a seal around the rod that attaches between the arm and the diaphragm.

Do you see a vent hole on the side of the pump? No crankcase oil ever escapes the hole, so the seal is indeed there to prevent oil loss.

When a tube is epoxied into the vent hole on the body, the boost pressure acts against the seal on the rod to prevent pressure escape into the crankcase, and pressure against the diapragm to raise fuel pressure.

I will take a picture and load them into photobucket shortly.

 

[Anonymous]

If you read a few threads down you will see a thread titled: "best fuel set up for turbo???"

In that thread, I replied:

"I put pressure to the factory fuel pump vent hole with a rubber tipped blowgun hooked to a regulated source. It started to leak from the "arm hole" right away, to my disappointment. I figured it was already junk, so I kept turning up the pressure to see where it would "pop" at.
I went all the way to 30 psi, and while it continued to leak air it never got any worse. I figure that is good enough, so I drilled the vent hole a little larger and epoxied a tube in place for the boost reference."