swashannon

Hey all, long time lurker, first time poster. Great site with lots of info. I've always been able to find what I was looking for searching, until now. A friend picked up an 88 4x4 that had a bad hg and was being parted out at a pretty good deal. Here's where my dillema comes in. A majority of the efi stuff is missing (maf, tps and connector, cs injector and time switch and the efi harness is hacked up pretty bad). I have a weber, intake, and distributor from a 22r that I'm going to put on to keep him from having to put a ridiculous amount of money into the motor after he is already getting the block and crank machined and going with an engnbldr kit. I'm wondering about fuel pump options and if anyone has ever been in this position? Here's what I've come up with so far

1: bypass circuit opening relay and run the efi pump with an oil pressure shutoff and fpr. Stock pump puts out 60ish? Is this even possible to regulate that many psi down to 3-4 without lines or the regulator blowing apart?

2:Source a 22r fuel pickup and sending unit

3: is the efi pump idle with no power (meaning there will be little resistance for a low pressure electric pump mounted outside the tank and pull fuel through the efi pump)?

Any and all suggestions welcome. Hoping to have the parts back from the machine shop next week and have it running by the new year.

wyoming9

iTrader: (1)

This is off the top of my head so I might be remembering wrong.

I kinda remember seeing a fuel pressure regulator that one connected both the incoming fuel lines and the return line .

Then you had the line to the carb that way the extra fuel was returned to the tank just like the efi set up.

One adjusted the pressure with a fuel gauge.

If your using rubber fuel line You want Fuel Injection line and clamps.

You can pull through the electric pump but it is really making lots of extra work .

If it is a Truck lift the bed off remove the electric pump do it the correct way in the long run no doubt much cheaper

swashannon

I found the regulator you are talking about. So your suggestion is use the efi pump and let the excess pressure it puts out be re routed back to the tank and let the correct psi to the carb? Or swap in a carbed pickup and low pressure pump and regulator with the return still hooked up?

wyoming9

iTrader: (1)

Pretty much those would be your best options at least the way I look at this project.

superex87

The efi pump will move to much volume for any regulator to handle at such a low psi. use a stock mechanical 22r pump with a holley regulator.

wyoming9

iTrader: (1)

If one uses the stock pump why do you need a pressure regulator I am always willing to learn more things.

swashannon

A stock mechanical pump still puts out a little too much pressure for a weber. I haven't ever been able to get one to run with more than about 3 and the stock pump puts out 5.