ECMlink Discrepancy between boost gauge and ECMLink boost est.

[blujeans]

This has been happening for the last week. While my aftermarket boost gauge is showing around 10-12 PSI of boost while on my datalog, it's showing only 6-7.4 PSI. I have a feeling this is a boost leak, am I right? Otherwise what else could cause this? Datalog showing the issue is attached below for anyone to check out.

 

[Vegas Smith]

From ecmlink:

"BoostEst
BoostEst estimates “boost” from airflow per rev. On a properly configured car, this value should match measured manifold pressure pretty closely at wide open throttle around 5500-6500 RPM. Outside this range, BoostEst is expected to fall off from measured. The BoostEst calculation is not calibrated to read accurately at any other engine speed (RPM).

That said, BoostEst is still VERY useful. It can be used to catch gross errors in configuration or it can be used to fine tune a setup that's running pretty well already."

 

[jed344]

Vegas is correct. I will add in my speed density set up with the tune done correctly the boost est matches and is within 1-2psi all the way up to 8,500rpm.

 

[blujeans]

I'm not running speed density yet, soI'll have to do something else until I finally get it.