Where to tap for fuel on wet kit install

[squeak10686]

Hey guys, I have used the search button but I havent been able to find anything about this,

where can i tap the fuel line for the fuel solenoid, I was thinking of following the line from the fuel pressure regulator, and than following the line back a wase and puting the fuel line there, would this work, or where is going to be the best spot to do this,

Also if you guys have pictures of your setups that would be great

there is a post under tech articles, but that is for a Zex wet kit on a 420, and that wont do much for me, thanks alot

Andrew

 

[MNGSX]

Put a T on the line going INTO the fuel rail.

 

[squeak10686]

which is on the left side or the right side of the fuel rail???

i think i put it on wrong, i put it on the lien going to the other side of the fuel pressure regulator

 

[MNGSX]

Yes that is wrong.. It should go inbetween the rail and the fuel filter.

 

[DSMJim]

which is on the left side or the right side of the fuel rail???

i think i put it on wrong, i put it on the lien going to the other side of the fuel pressure regulator

Your fuel pressure regulator is the LAST thing in your fuel system. It regulates the pressure back to the pump by allowing fuel past it in various amounts to create a constant pressure depending on how much fuel the car is pulling.

You taped into the return which is low pressure and a great way to blow your car up by leaning it out really badly with 15psi of fuel pressure to the nitrous system instead of 60. Kinda like 75hp nitrous and 10hp fuel shot, thats gonna hurt.

Move the feed for the nitrous to the line between the fuel filter and fuel rail.

 

[squeak10686]

thanks alot for the help... i feel like an idiot

 

[baxsom]

the tech article for the zex wet kit for the 420a says to tap the schraeder valve on the fuel rail for the fuel line

the earlier post says do not tap the return for the nitrous kit fuel source but instead tap the input line

so for those of us that installed a turbo on the our 420a's and used this port for a return line
should we disregard the tech article and tap between the fuel filter and rail
or should we tap between the rail and fpr like the tech article says

 

[rys]

the tech article for the zex wet kit for the 420a says to tap the schraeder valve on the fuel rail for the fuel line

the earlier post says do not tap the return for the nitrous kit fuel source but instead tap the input line

so for those of us that installed a turbo on the our 420a's and used this port for a return line
should we disregard the tech article and tap between the fuel filter and rail
or should we tap between the rail and fpr like the tech article says

I'm not familiar with how the 420A turbo kits work. You are using that port for a return fuel line direct to the tank? or to an additional FPR to hold pressure?

However it's done, the tap for the source of fuel to the fuel solenoid should be performed on a high pressure side. (This means it should NEVER be _after_ an FPR or in a return line). Always tap before the FPR.

-Brian

 

[baxsom]

yes for the 420 engines that have been turbo'd you disengage the stock fpr and install a return line to the new fpr from the test port

the zex install manual says to tap the test port for the fuel source for the NMU



so where are you getting tapping before the fuel rail

because it seems that there are a lot of people then who have their kits installed wrong

 

[rys]

so where are you getting tapping before the fuel rail

because it seems that there are a lot of people then who have their kits installed wrong

Ahhh, you misread me. (read again). I said before the FPR (Fuel Pressure Regulator), not fuel rail, although if you were to tap before the fuel rail that is also before the FPR.

I mean basically anywhere before the FPR. At the test port is fine in your case, you can even install the T right there, or if you really want you can install it in the high pressure line leading to the fuel rail.

Anywhere on the high pressure side between the fuel pump and the FPR is fine. Anywhere after the FPR (return side) is too low of a pressure for most systems and most likely will cause a lean condition and damage.

-Brian

 

[squeak10686]

Would some of you guys who know quite about this be able to drop me an AIM message at spoolinawd95 thanks
Andrew

 

[baxsom]

sorry about that
i read what i thought i read and all of a sudden what i thought i knew didnt seem like i knew it anymore

did that make sense at all??

 

[mlopez]

Why would you ever want to tap into the existing fuel line. That's a good way to blow up your motor. What you need to do is run a seperate fuel line and pump(external) with a fuel pressure gauge tapped into it so you can see if you have any fp drop. That would be the safest way.

 

[baxsom]

because the existing fuel pump already pumps way more than enough fuel
if not there would be no need for a return line

nitrous kits like zex only need 38psi of fuel to operate
and if you tap after the fuel rail you arent taking any fuel that the injectors needed anyway

 

[MNGSX]

It does'nt matter. Any point between the fuel filter to the FPR inlet will have the same fuel pressure....

A T on the inlet line may be farther isolated from the fuel injector pules effect on pressure fluctuations.