spec II accuracy

[baxsom]

question about the accuracy of of the greddy spec II
my digital boost gauge reads a different vacuum from the spec II
i am assuming that is because the greddy is hooked into the fpr
however when i go into boost the boost gauge will sometimes read different than the greddy
it can be up to 3 psi off in some cases
which one should i trust more

my opinion is the greddy since it is plumbed right into the wastegate

others?

 

[kpt4321]

The wastegate doesn't have boost pressure, we need to know where the wastegate actuator's pressure source is going from.

 

[baxsom]

well i am assuming that the spec II was installed correctly by the builder
it works anyway
the turbo is a hahn kit
the control unit for the spec II was spliced into the tube going from the wastegate actuator) to the turbo
and then the fpr was spliced into and ran to the actual unit in the car

like i said it works
and all of the install manuals was included with the car so it looks like it was installed correctly
i would just like to know how accurrate they are known to be