well reading the post about the dump valve for the S1, it got me thinking,

people are now taking them off,

a - becasue there anoying

b - the car runs better

and

c - its seems to make the car feel more powerfull.


so the question is. has anyone done a rolling road with a dump valve on, and then done a second run with out it, and was there any difference in the read outs???