rtboy10

ok guys this question could be dumb but to me it may sound like the fuel pressure might be different if measured this way instead of how I currently have it.

I have a gauge mounted directly above the banjo bolt from the feed line to the rail.


my pressure reads at 40psi

my SOS stage 1 instructions state that fuel pressuere with intake manifold at atmosphere pressure measure using vacuum for fpr should read 50psi

would this reading be the same as my fitting I have off of the rail. I'm just kind of being over cautious here before I adjust anything

rtboy10

Awesome thanks for the reply.

What is your set up currently? He's running the rrfpr supplied from sos. It says that the fuel pressure at idle should be 50psi would this be with the vacuum line removed? I'm just confused I'm pretty sure in the instructions they are just stating a different way to go about measuring the fuel pressure but I could be wrong.

zeroptzero

my fuel system is all stock, for a NA stock motor, my fuel pressure gauge is mounted on the fuel rail in a tapped and threaded hole. I'm sorry but I am not familiar with the settings of that fpr.

s2000Junky

Don't pay attention to the SOS recommend fuel pressure, its extremely general. No two conditions are the same to be able to set one fuel pressure on all S2k and have it be the proper/safe fuel to air ratio. I strongly advise you invest in a wideband so you can monitor your afr, then you can actually properly set the rrfpr to the proper adjustment based on the actual afr, and keep it there on the street as conditions fluctuate. Your running blind otherwise. Risking your motor.

rtboy10

Thanks a bunch for the suggestion that's the next thing on the list..

The car is bone stock besides the s/c so I figured that getting the fuel pressure set around the specs of the recommended suggestion might be a good starting point.

The car has not really been driven since the install (around the block a few times)

My quick question though for when I do get a wideband installed today or tomorrow should I set my base fuel pressure closer to 50? Or just see the readings and go from there.

I appreciate the replies

steven975

I have a stage 1, too.

Set it according to the instructions...and I do think it needs to be around 50 if I remember right.

Still you need to get a wideband. I can't stress how critical this is. You have no idea what's going on otherwise. A sniffer at the tailpipe isn't the same thing.

The AEM wideband/guage kit is what I got.

Also when you're done setting it up, pull that fuel pressure guage off...you can ride around like that for a little while...but it WILL break and worst case leak fuel and torch your car. You can swap it on/off in 15 minutes.