any one know what a stock fuel regulator flows on a Pro5? could any thing be gained by switching to a higher flowing after market one? my friend has a 2000 civic SI, he has a turbo on order so he went ahead and started putting on his parts he will need when it gets here. he said when he added his high flow regulator he noticed a little power increase> is this possable? could it help? could it hurt.

 

Workshop Manual Page 01-14-7
Fuel Line Pressure
270-310 kPa {2.7-3.2 kgf/cm2, 39-45 psi}


I installed one from Ractive....I haven't dyno'd it yet, but did notice a little more responsiveness. I increased the pressure to about 50 psi.



Hope this helps.

 

Did the Ractive FPR bolt onto the stock fuel rail or did you have to do other modifications. I"m interested in lowering my fuel pressure to lean out my mixture some.

 

It does bolt directly with the fuel rail. Ractive carries differnt PNs for the different makes. The only thing really missing from the kit were proper length bolts. Other than that, it took under 30 minutes to install.

 

How much did it cost?

And it had this pressure display with it???

 

I thought the stock regulator was further back on the car?

 

I'll see if I can get a price for it, I'm sorta sponsored.

The stock regulator is right there, in that area attached to the fuel rail.

As for the Ractive FPR, that is the hole thing, the display on the right with the adjusting screw on the left.

 

I thought that was it on the fuel rail. A performance place that shall remain nameless (although they are large) told me it was back by the fuel pump on our cars. I've worked on a lot of cars and thought for sure it was right there on the fuel rail and I could look right at it. Stupid people.

 

you can't get that big a jump outta a new fuel reg cuz your still running the car in standard atmosphere-you can enrich the air/fuel mix a little but unless there is somekind of forced induction project in the future, is there a point to having it?

 

Actually what I want is to monitor the fuel pressure during a dyno run. If the ECU runs it up from 39 to 45 psi as RPM climbs, then it's doing the same thing as a rising rate regulator would under boost. If it's steady at whatever pressure, then I want to use an adjustable regulator to turn the pressure down slightly. The ECU will compensate during closed loop but it will lean out the over rich condition at WOT. This is one of the things my dyno shop recommended a while back.

 

Yeah what traveler said I'm planning on doing the same thing along with the cam gears from sunbelt to advance my timing that way I can get the full potential out of the cams and pistons I have. Oh yeah BTW you can pick up those regulators through NOPI for 142.11 just so you know where to get it.

 

What's the part number and do I need any other fittings? I may have a way to tune this thing shortly....

 

Traveler: Ill get you a part number shortly. You'll need a couple of things... I have pictures I'll post them shortly.

 

Im thinking about to get the FPR but i have a question... i dont quite understand why you want to lean the mixture? Should it run better then? I have cams and cone filter with CAI and thinking about to get the cam gears.... should i then also lean the mixture or rise the pressure???

 

It depends on climate, humidity, and the driving conditions you want but out of the factory you shouldn't have to run the car lean.