Nos and twin turbo
Nos and twin turbo I already have the nitrous in the car because it use to be a carb, 406 with nitrous. Its now going to be a twin turbo ls1. My question is should I keep the nitrous and spray something small. like a 50 shot for some extra intake charge cooling? I know i would have to switch the plate out for some fogger nozzles.
You should keep the fuel pressure referenced. But it really depends how much boost you expect, and what fuel pressure you will be running.
An example without a boost referenced fuel pressure regulator:
If you run 10psi boost and had only 7psi fuel pressure, then your effective fuel pressure would be -3psi (7-10) This would push the fuel backwards back into the tank. (very bad) But if you ran 50psi fuel pressure and only 5 psi boost, then your effective fuel pressure at full boost would be 45psi (50-5)
Now, to tune your system, if the nitrous started before you had built any boost the effective fuel presure would be 50psi then it would go down to 45psi at full boost. This is a 10% drop in pressure, which will make tuning dificult.
If you run a boost referenced pressure regulator, then effective fuel pressure is always the same regardless of boost level, and makes tuning much easier.
Vinny
An example without a boost referenced fuel pressure regulator:
If you run 10psi boost and had only 7psi fuel pressure, then your effective fuel pressure would be -3psi (7-10) This would push the fuel backwards back into the tank. (very bad) But if you ran 50psi fuel pressure and only 5 psi boost, then your effective fuel pressure at full boost would be 45psi (50-5)
Now, to tune your system, if the nitrous started before you had built any boost the effective fuel presure would be 50psi then it would go down to 45psi at full boost. This is a 10% drop in pressure, which will make tuning dificult.
If you run a boost referenced pressure regulator, then effective fuel pressure is always the same regardless of boost level, and makes tuning much easier.
Vinny
Originally Posted by camrsz
Is does the fuel solniod have to be on a rising rate if its on a stand alone fuel system?
yes, both should be referenced
Originally Posted by camrsz
i was planning on having the efi regulator on boost reference, but you are saying i should also have the nos fuel regulator on the stand alone also on a refererence?
