Quote:
Originally Posted by Myaddiction
Thanks for the reply. The stock boost for the S63 in the E70/71 X5M and X6M is 17.5 psi. I just saw the thread Terry posted about tuning your X on Bimmerb**st and the first runs do start around 8 psi. I'm curious if that is a function of using the BCM's and starting at the default wastegate spring pressure. It is common on the older X5/6M's to have cracked vacuum lines and run that boost. There is a couple of threads about it. I have the Awnon gauges and it shows 17.5psi under WOT. With the AA tune I see 21psi at WOT.
I guess the stock turbos are maxed out pretty much at 18-19 PSI like Terry said in the thread about tuning your truck.
I'll get the JB4 regardless for the features and the ability to adjust the boost since I have a set of PURE stage one turbos installed but haven't been able to push them with the out of the box tunes available.
Thanks again for sharing the info.
|
Updates please! I want to know more about the pure turbos.... Did you notice any improvement with them right out of the box?