Ive heard that these sometimes cause some problems is that true? I want be safe when running the nitrous.

 

The FPSS is a great accessory to run. The problem is that most people really do not know how to adjust them.
Dave

 

I agree with you at that one! We test and precalibrate all our FPSS before they leave the door!

Dean

 

So if i was to order a FPSS from you guys it would already be set? so i wouldnt have to worry about setting it myself?

 

Any tips?

 

Ditto

 

Exactly!

Dean

 

The problem seems to be that most users set them too high, so when there is a brief dip in pressure when the N2O system activates in immediately kills it causing a surging. The trick is to set it a few psi below that.

 

that is very helpful!

 

So Dave, is yours already set? You know I bought that one a few weeks ago from ya and I took it off b/c I was told they dont trigger till fuel pressure dropps to like 15PSI...which by then, it is all over anyway.

 

I tested one I got with Dave's plate kit last year, looks like it breaks continuity right around 40-45 psi. Thats probably a good point for the 60psi operating fuel pressure I'm seeing.

 

Yes, I agree. I would set it to 45ish, myself. If this is the case with all of the sensors sent out, then I am putting mine back in.

 

How do you adjust them????

 

to adjust a FPSS,

1) verify that the bottle is closed and there is no nitrous in the feed line
2) remove the fuel line from the nozzle
3) activate the kit
4) using a can to catch the fuel flowing from the fuel line, slowly tighten the screw on the end of the FPSS until the fuel starts to fluctuate.
5) Back the screw off 3/4 of a turn
6) hook everything back up and you are done

 

How do you adjust it with a dry kit?

 

There isnt a Fpss with a dry kit .

 

Sure there is. Losing fuel pressure on a dry shot will be just as bad. Usually goes on the end of the fuel rail.

 

ya. there should be. and the adjustment is just the same. It can also be done with an air compressor and a ohm meter or light bulb. Then it's off the car and no gas splashing out.

 

Youre right , It didnt dawn on me till after i posted this stupid comment