Hey this weekend I am gonna tackle the MAP swap from MAF. Just curious if theres any rules for the vacuum to the map sensor. I havn't really paid attention before but have seen something about length and diameter making a difference on the reading. is this true? also is it better to be engine mounted or firewall mounted?
Last question, I am out of vacuum ports on my intake, Can I T it off something like the fuel pressure regulator or is that a bad idea? I may have an extra port now I think about it

 

Don't use the FPR source. Let it have a dedicated source. Maybe drill the intake, and add another port. Firewall or engine does not really matter, but I would choose engine mount, to keep the vacuum hose as short as possible. One important thing is to mount the sensor in the upright position,(plug, and vacuum port facing down.)

 

thanks ill try to engine mount it with the shortest hose possible, looks like 1/4 inch hose?

 

Why does need to be mounted upright