Pressure Source For Boost Gauge

[03EV0LUTI0N]

I recently purchased a Pro-Sport Digital boost gauge... Im interested in hearing what pressure source ppl are using for the sending unit... my issue is that the sending unit and wiring harness for the gauge do not give me alot of play... its looking like i will have to tap into a pressure source closer to the firewall.. Other forums ppl are using the FPR line... that to me just sounds sketchy.. is there any major difference in boost measurement accuracy when using a pressure source closer to the intake manifold VS. the turbo side of the motor? I plan on mounting the gauge under the radio console..

[SicLanEvo]

the FPR line is the proper spot for very accurate readings. This is the only place i have tapped for a pressure source in my evo and in my eclipse. that is also where Mitsu taps in for the MR gauge package in later model years.

[03EV0LUTI0N]

sounds good... im getting ready to start the install right now... what 12V source are you using? door locks? what about accessory power?

[SicLanEvo]

why would you use the door locks as a 12v source? then it would be constant on all the time, or only when you hit the door lock switch. it needs to be hooked to a 12v source that turns off with the ignition. either the cig lighter or the actual ignition. Mine is hooked into my ignition patched into my turbo timer harness.

[03EV0LUTI0N]

thats what i thought.. but the directions say a 12V source (for the harness into the gauge as well as an accessory source... the sending unit only requires a 12V accessory source.. without both the 12V and the accessory wire drawing power the boost gauge will not cut on