What all is needed to set a system like this up. what type of pump and regulator is needed and does it need a return line? Please post pics

 

YES!!!! it needs a return line, if not you will go extremely lean everytime you first apply the squeeze. A 3 port regulator like the Holleys or Mallorys should be fine, I am setting mine up with a holley. A holley blue should suffice as well, and Jaz sells a nitrous fuel cell that can be within the engine compartment. Do a search, I posted several pics in a previous post, but am too lazy to retrieve them lol.

 

isnt a holley blue for carb pressures like 7psi not 43.5. How does the return line keep a lean condtion from happening

 

If you are running a dedicated fuel system, you can use whatever fuel pressure you want providing that you use jetting for that specific fuel pressure. You would just run the nos or nx jet recommendations for their carb applications.

I have heard from 2 or 3 people that without a return line, they were having huge detonation problems when their systems were first activated because of air in the fuel line. I am not going to risk trying it, so I plan on running a return to be safe.

 

Here is a write-up I did when I built mine:

http://www.cofba.org/users/reckless/dp_fuel.html

 

I have seen a couple people mention using small jets in their return line, what is the point of this?

 

You only need the jet to help restrict the flow of fuel back to the tank. The idea is to allow air to escape back to the tank and ultimately the vent. The second is that you don't want to induce a signficant pressure drop across the jet under operation. A smaller jet will allow you to maintain pressure. With smaller shots around 200 or less you can get away with an .031 jet. Larger shots require more fuel to make it through the solenoids and you'll ultimately bleed off through the tank too, like a 9th cylinder. Tightening up the jet size reduces the fuel pressure drop across the jet. Make sense?

Here's some more info on this exact same topic. http://www.ls1tech.com/forums/showthread.php?t=124350

 

I think my write-up may say .034 jet, but it should say .024

 

Not that is matters because you guys are allready set on running a return line.I run mine deadheaded. I just received a reply back from Nitrous works on return lines. Here is a direct quote.

Ray

On an entry level kit you would not need a return line you would
just
need to be able to adjust your fuel pressure to the fuel solenoid
between 5
and 7-1/2 PSI. Adjustments should be made free flowing after the solenoid and not deadheaded.

Thank you

Technical Support

Barry Grant, Inc.
BG Fuel systems, Demon Carburetion, Nitrous Works, Rush Performance
Filters

1450 McDonald Road
Dahlonega, GA 30533

Phone (706) 864-8544
Fax (706) 864-2206

Mon to Fri 8am to 6pm EST

 

You can run it deadheaded or with a return line. I have been over this with Kurt Tamez back in June of this year. He gave me loads of info. If you do a search in this forum under my screen name you should find it. There is lots of info in the post.

Dead Head---Good if you purge the entire system before you launch. Usually a couple quick full throttle revs with the nitrous engaged and tranny in nuetral. This will clear out the line of any trapped air and cause the pressure to creep up above what it is regulated at until the fuel selenoid opens. This is good for filling the fuel line to the nozzle faster because ofthe increased pressure and the pressure will return to what you had it set at when it was flowing.

Return line with jet---Great if you get the special fitting and have the return line right at the selenoid. I have this setup and there is a y fitting with a small jet for the return line in it. If you have the return line at the fuel pump it will not bleed out all of the air from the line going to the solenoid. Point of this setup is that you do not have to "purge" the nitrous through the motor to bleed out the air if you have the return line at the selenoid. Still have the added benefit of pressure creep at the selenoid to fill the fuel line to the fogger.

Return style system---Similar to the y-fiitting in bleeding the air but you will have to buy a regulator and fuel pump that is designed for a return style sytem which can be costly. Do not have the benefit of pressure creep as the system will stay a constant pressure and can be tricky to figure out the correct line size as to not get any pressure drop once the fuel selenoid opens.

My Setup--1 gallon Jaz fuel cell mounted in the front bumper on the passenger side. Product engineering filter into Product engineering 290gph pump (big pump internally set at 19psi) into a Holley standard $20 regulator into the y fitting in the selenoid and into the return line back to the top of the fuel cell.

I run 8an from the cell to the filter, pump , and regulator and -6an from the reg to the y-fitting and a -3an from the y-fitting back to the cell.

About the fuel pump, it is better to run a monster pump as to not have any pressure drop fluctuations and to keep the fuel supply available at all times. It is more costly than a Holley blue but it is twice the pump and is safer this way. I run my system at 10psi through a singel fogger and this system has worked flawlessly so far. I run c116 in the tank and pump gas in the cell. BTW this fuel system can support a direct port system up to 600hp if ever needed.

That should answer a lot of the questions. Let me know if you have any more.

Later

Matt

 

Finally finished my writeup with pictures. Let me know if you have any questions.

http://www.derty.org/?body=Installs&content=directport