Nissan CA18DET S13 Fuel Pressure Regulator Query

[young_un1]

Hi there,
           I have just purchased an adjustable fuel pressure regulator and began fitting it today. When I took the fuel rail out to fit the new RB26 DETT injectors and was looking at the original fuel pressure reg, I noticed that it mounts directly to the fuel rail. I understand that I should remove the OEM FPR: has anyone got an example of how to connect to the fuel rail please as it isn't a straight fit?

Is the OEM FPR a bottleneck in the performance of the CA18DET?

The other query was as follows; some cars have no connection between the FPR and the manifold via a vacuum pipe, as such, the fuel delivery is at constant pressure and is controlled purely through pulse width I assume. Is this something that would be advised with the S13?

Many thanks for any info anyone has:)

Cheers,
           Al.

[rob@vems.co.uk]

I'm told that there are adaptors for aftermarket FPRs, although I know nothing about them.

I've not heard of the OEM one being a big problem.

With turbo installations FPRs tend to be fed manifold pressure to increase the fuel pressure a corresponding amount.

[jrussell]

I understand that I should remove the OEM FPR: has anyone got an example of how to connect to the fuel rail please as it isn't a straight fit?

You just remove the stock FPR and put a hose between the rail and the new FPR. Many people use Stainless steel braided hose, but fuel injection rated hose works just fine, just not as flashy or expensive. 

I'm not familiar with Nissans. On Hondas the FPR is a press-fit with an o-ring. You'd need to tap the rail for a fitting there or some other method of attaching a fitting. Sounds like it would be easier to keep the stock FPR considering nobody had identified a problem with it.

-Jason