How can I convert lbs/ft² to inHg? Because there's a token variable called RECIP_ENGINE1_MANIFOLD_PRESSURE but it's measured in lbs/ft².My needle is currently rotating 15 times when advancing throttle from idle to full open.It's not the nonlinearity table, I'm rather sure.Thankshttp://flightsimmers.net/airport/etti/signature_pro.jpg

Which xxxgauges.h are you using? If it is fs2kgauges.h from sd2gauxx.zip search for "INCH_HG_TO_PSF" and "PSF_TO_INCH_HG".else define like this:#define INCH_HG_PSI_FACTOR (.4912)#define INCH_HG_TO_PSI(press) ((press)*INCH_HG_PSI_FACTOR)#define PSI_TO_INCH_HG(press) ((press)/INCH_HG_PSI_FACTOR)#define INCH_HG_TO_PSF(press) ((press)*INCH_HG_PSI_FACTOR*144.0)#define PSF_TO_INCH_HG(press) ((press)/INCH_HG_PSI_FACTOR/144.0)Arne Bartels

Thanks, works fine. :-)Etienne