Few questions regarding decreasing power on my car, i understand it could be difficult to determine the main cause, but i would like to hear few opinions.

The car has recently been on few rolling road sections, when it originally mapped by JGM it made 341/349, about 8 months ago, it produced 329/331 on Prosport roller, now about last week it only made 313/310, on scoobyclinic roller. I do understand the would be difference from roller to roller, but I see everyone making their figures, That really gonna thinking something is going wrong..what ever it is, it's getting worse and worse.. I have been struggling to understand what's the main cause of power lost. Car drives great and no smoke from turbo kicking etc etc. Service every 5k miles.

Car has a sport-cat turbo back, panel filter, walbro pump. Ecutek map..if anyone could share some light that would be appreciated.

 

Go back to the original RR and see what you get. You may just be worrying about nothing.

 

oe even better get your mapper to go out with in the car a check it over if there is any thing not right im sure they will be able to point you in the right direction