On www.z28boy.cz28.com the guy has installed braided fuel lines and a fuel pressure gauge on his TBI. He has the pressure gauge on the feed line. Is that where it's supposed to go? Don't you normally install a pressure gauge on the return side of a fuel injected system? Or would it not make a difference?

 

You install it on the feed line. Here's a picture of my Summit gauge installed in the rubber feed line on the drivers side.

 

Yeah, the feed line is the pressure side. Think of it as the fuel coming from the fuel pump and then to the gauge and then the injectors then the pressure regulator and back through the return line into the tank. The gauge has to be between the fuel supply (the pump) and the regulator for it to read any pressure. The return line is no pressure and just returns any fuel that isn't used by the injectors.
I like how that summit gauge was installed in the rubber line. Very nice job. I'll probably end up doing that if I can't find access to the tools needed for flairing the stock metal line. I'd rather have the regulator as close to injectors as possible but it doesn't matter unless you're actually driving the car and are looking for fuel pump problems under engine load.

 

I think Jon meant to say he'd rather have the gauge as close to the injectors as possible, not regulator close to em. Its already in the pod.

Unless you put in an external adjustable.

 

The pressure is going to be the same anywhere between the pump and the regulator.

 

yeah what they said.

-brian

 

Thanks for clearing that up guys. Now I know.

 

Hey guys since this was the topic. I see that you had put that gauge in the rubber line. I was wondering if anyone was able to find a T fitting to put it in between the flexible line and the hard line? It seems to make more sence than cutting the line. Although I have been searching and I am having a hard time trying to find the right sized T fitting. Has anyone else tried to do this?

 

I want one of those! BTW- would having a PSI gauge be useful in telling if my pump is getting weak in its old age?

 

ANyone .........anyone..........Bueller...........Bueller

 

Earl's Plumbing has an adapter to fit on the factory feed line and converts over to a -6 AN fitting. From there you could make up whatever fuel routing you want too. Also, Someone bought these TB fuel line adapters awhile back from Holley. They connect into the TB and convert down to a -6 an fitting. I think it costs around $65 for both of them (feed line and return line). Here's the picture:

 

hey, that looks like the table i have in my room..wait a minute! that IS the table i have in my room! haha those are mine...i had to order them specially from holley. they are NOt earls though, so dont bother looking for them under an earls part number.

i am on my way out the door, but check out my web site for the info on the fittings. its all on there, with pictures, etc.

ill be back later and i will put all the info you need...i am just ina ruck now though...


-brian

 

it seems easier and cleaner just to put it in the rubber line.

 

Z28Boy, I was referring to the Earl adapters I saw on your website. BTW, Great Site! Anyone wanting to route new fuel lines with "AN" fittings should check this out.

 

This Earl's adapter from Z28Boy's website is the one that connects to the factory rubber line. From here you could fab up a T-fitting anywhere in the line or replace the entire line with braided hose. I hope you don't mind me posting your picture Z28Boy.