how accurate is the greddy profec b spec 2 boost controller reading? compared to a boost guage? is it higher,lower etc... just wanna know so i can adj it accordingly..and no i dont have a boost guage installed..any info would be greatly appreciated...

 

ive heard it is one of the most accurate boost readings available. My defi gauge reads 1 pound heavy at boost then the controller and then usually .5 a point lower in vacuum. Last few times on the dyno, the dyno reads the exact boost my greddy does although they are pulling boost from 2 different points. My defi and greddy share the same boost source but read different

 

Probably because your defi is mechanical (maybe?) and the profec I assume runs of a MAP type sensor which would be more accurate.

 

my defis are the BF series... the EBC does not use a map sensor, it simply reads the vacuum source supplied by running a hose from the unit directly to a T in the vacuum system.... they are both pulling reference off of the same T

 

so pretty much the same? i have a prosport guage that im installing in like 2 weeks..

 

pretty close but id say more accurate than my gauge

 

ok thanks man..

 

The sensor is more then likely internal to the unit, much like the control unit for the SMC alky injection.

 

you are probably correct

 

From my use of it. Its basically dead on with a dyno, my boost gauge, and my jdm map sensor. The profec is off like .1 from a zeroed JDM map on my car. It could vary car to car I suppose

 

thank you ^^