TLink Boost vs Boost Gauge

[6SENSE]

I have noticed since adding boost sensing capabilities to TLink 3.0.2 that there is a discrepency between those readings vs my boost gauge. I made a couple of runs last night and TLink showed 21psi as top boost. If I went by the gauge (which I wasnt trying to do, since I now have Tlink to do that work for me) I would have thought I was running 26~psi.
Both the gauge and 3-bar map are branched off of port on back of intake. 3-bar map is over at pass. side fender with stock map, and boost gauge is tapped in going the other direction behind engine towards driver's side to enter through firewall. Dilemma is, which one should I pay attention to? Why are they different?

Thanks, Justin

 

[kenmosher]

The TurboLink boost harness has been calibrated to be within a 1/2 PSI of a known source (we used some calibration equipment that they use to calibrate gauges for nuclear plants).

If there's a leak in the vacuum line or a restriction in the line going to the MAP sensor, it could account for the difference.

Another thing is to be sure you calibrate the TurboLink gauge, as per the procedure. Key on/engine off, hit F5 while running the program.