I'm finding this issue a bit confusing. I'm refering to the helm's manual that specifies fuel pressure for JDM B16 with PR3/PW0 ECU.

It says that the results for proper fuel pressure should be:
- engine IDLING
- regulator vacuum hose disconnected and pinched.

With this condition, I'm assuming that you want to plug up the manifold as this will cause the RPM to fluctuate b/w idle and 1500RPM, Right?

- pressure of 35-41 PSI

I'm having a bit of an issue with this as looking at B17 motor for example, you should have 48-56 PSI with engine idling and vacuum hose disconnected and pinched. The ITR USDM calls for 47-54PSI.

So, should B16 operate on that low of a fuel pressure? I guess I'm having hard time accepting that 200cc difference in displacement could call for 10 PSI of a fuel pressure dropp.
TIA

 

Shouldn't it be around 42-44psi?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EFSiR &raquo;</TD></TR><TR><TD CLASS="quote">With this condition, I'm assuming that you want to plug up the manifold as this will cause the RPM to fluctuate b/w idle and 1500RPM, Right?

- pressure of 35-41 PSI
</TD></TR></TABLE>

Just disconnect the vacuum hose from the fuel pressure regulator. Idle will raise and stay steady. This simulates a full load condition (pedal to the floor). No need to plug up the manifold. Set your fuel pressure to 35-41 (vacuum hose off) on a stock motor. I have i/h/e/70mm tb/itr intake manifold. I run 46-48 psi of fuel.

It says 35-41 psi for the b16 in my 90 crx honda service manual.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">

I have i/h/e/70mm tb/itr intake manifold. I run 46-48 psi of fuel.

</TD></TR></TABLE>

Is this fuel pressure a result of dyno tuning?
TIA