What Size Injectors for Boost Reference Fuel System

pokeyl

Got it at 15 psi of boost would need over 100 psi of fuel pressure

__________________
It's not my fault I'm old, I was born a very long time ago!

phunk

No, you do not need over 100psi of fuel pressure for 15psi of boost.

I think that you are not understanding that your effective fuel pressure is the difference between your rail pressure and manifold pressure.

__________________

pokeyl

You would for stock injectors?

__________________
It's not my fault I'm old, I was born a very long time ago!

phunk

Ya you would need a ton of fuel pressure to get stock injectors to take you into high horsepower. But they probably wont function correctly at those pressures, and your fuel pump will have terribly low output at that pressure.

__________________

bullitt5897

Fuel injectors have an optimal duty cycle. Once you past the maximum duty cycle it is very likely they go static causing instability and lean conditions in your motor. There are some good videos on youtube showing what happens when you go too high in pressure and the Injectors pretty much shut down. 100 psi is insane on stock injectors!

__________________
Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054