Quote:
Originally Posted by Sniper q8
complete the work today
i dont like here sound its too risspy is that normal ?
anyway that isn't important
i feel a bit disappointed about the performance
i tried with my friend m5 i toke the lead but i feel not enough because his car is completely stock and also need new plugs and the other stuff
tomorrow i will put her in a dyno again to see
my last hope on software 
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I hope you have driven the car enough before you make any kind of judgement.
When any header is initially installed the car typically feels flat and lethargic. You need to drive it and drive it quite hard.
It may also be necessary to reset adaptions and drive some more.
Leave the dyno until I can do the software so we can save money and time. If any adjustments are required (unlikely) then I can do them there and then.
Do things the way we suggest and you will be happy.
Oh... and make sure the air filters are clean! We just finished a car yesterday. Gained 35hp @ 5800rpm but only 25hp @ 7000rpm!. Looked at filters - very blocked.
Your car doesn't really have any other real performance parts on it that will make any kind of real difference so if you are beating a stock car already then your doing very well!
What does the other car need that is related to performance. Plugs won't make a difference I can tell you!