Hey guys!
Im pretty new to all this.
Have Kess V2, ECM and winOLS

why I got the tools is: couldn't not find a tuner to tune my own car properly so decided to give it a try myself

my cars are 2000 e55 Mercedes and 2008 jaguar XKR with Denso ecu

Tried 2 reputable tuners and bought their flash tunes for my Jag, results were less than impressive. On the DYno lost hp with one tuner and only gained 7whp with the second. Also tested the car with both tune on a drag strip, similar results.