Ok. So i got a aem series 2 and a blitz sbcid boost controller.

The blitz ebb reads a peak boost of 17.7 psi on a run. And the aem logs about 15psi??

Which one should i trust?

 

Do the guages ever agree with each other (idle, part throttle cruise, etc.)?

 

Where in your setup are the boost references for each gauge? Trust the one closest to the throttle body which should be the AEM. I'm guessing your BC is reading before the intercooler...a 2psi difference is normal

 

The aem reads off the hondata map sensor in the throttle body. The blitz boost controller reads right off the back of the intake manifold.