i know this sounds stupid. but i got the GMS1 since the trifecta i had was too much for me. tho with the GMS1 the MPG has dropped from 32mpg to 28mpg. i like the power on the GMS1 but hate the fuel economy. is there any chance my car can be tuned for the stock tune with the GMS sensors, and have the select a tune like the trifecta did for the power?

 

If you want a switchable tune I believe that limits you to trifecta. You could get a mild tune from someone if you dont want/need something so aggressive tune.

GMS1 shouldn't hurt your mileage unless you are driving harder. Most tunes won't until you use the extra power.

 

i drive the same way. my gage for boost is usealy at 10 vac but since the GMS1 is at 7 or 8 and if i try to keep it at 10 it looses speed. also i dont like the fact that if you try to not boost accel its like 6mpg when it usealy was 13-15mpg. eather something is dragging the car down or the tune is it.