I have a h/c/i 404 ls2 probably doing 500-550 rwhp. I have a racetronix fuel kit, ls2 rails, and ford green tops. Ive seen a write up about adding a return line.

Would i benefit from this at all?
I thought about getting a bung welded on the back of my fuel rail on the passenger side and running a line back.

I plan on hooking up my nitrous system again in the near future as well.

 

With your present system, probably not.

Once you add nitrous, it would be a good idea to help stabilize the fuel pressure. Nitrous hits tend to cause an instantaneous pressure drop that the factory system does not do a good job of compensating for. The more power, the worse the pressure drop.

 

Thanks!

If i start spraying on my setup (50-150 wet), would i need any additional fueling modifications or will the racetronix setup + green tops be enough (also assuming i do a return line.)

 

A return style system will give you dead consistent
fuel pressure, which is an embedded (but usually
false) assumption in the tune file. You can see this
by the perfect square-root fit of the stock IFR table
against vacuum.

If you know the fuel pressure and the injector flow,
you can be more sure that your airflow tuning is all
about airflow, not some mashup of air and fuel non-
idealities.

But that's kind of abstract to spend all that effort and
expense on, without bigger reasons.

 

I was planning on doing it mostly for the fact that it's a volume reservoir but I definitely did read a little bit about tuning one and realized the same thing that you said.

 

Call your nitrous manufacturer.