Fuel Pressure Regulator

[stu8v 68 1 Cars]

Is the vac signal needed on the fuel pressure regulator when using throttle bodies and standalone management?

 

Whats other peoples setups like?

 

cheers for any info

[petert 586]

Depends if you want compensation for atmospheric pressure. And if you're mapping the ignition via manifold pressure, it's easy enough to add.

[stu8v 68 1 Cars]

True, ill tap the manifold.

 

That way the mapper can have whatever they need.

[petert 586]

You can't just tap one inlet however, as it will pulse too much. To do the job properly, you need to make a vacuum rail which adds the four signals together. Probably why many don't do it.