Has anyone here every used a G-Tech meter and gotten close results from a dyno pull in their car?

I did a few runs with my G-Tech and my HP was around 152-155 in my 2010 cprs. what gives? It's suppose to have 184, surely it cant be that far out? Surely I can't be missing 25-30 HP. Or is the G-Tech method just not accurate enough?

 

G-Tech's can be accurate; however it's an old accelerometer that requires pseudo-precision on the curb weight and your shifting.
Assuming 15% drivetrain loss, a 172hp rated engine should show about 146whp...
So your readings from a 181hp rated engine should show around 153whp.

So, your readings are within spec.

- Erik

 

I think I may have the weight too low, so that may have something to do with the low numbers as well. I'll have to change it and do somemore test. Thanks for the info. BTW, are those DT losses for an auto or manual trans, cause I have a manual?
EDIT: Just checked the weight I had entered, way too low. 2600lbs when it should be 2725lbs. Hopefully thats my cause of the low numbers