Post by
WDRacing »
https://forums.nicoclub.com/wdracing-u3125.html
Sun Sep 02, 2007 4:50 am
Boost creep happens when the wastegate can't effectivly control the amount of pressure inside the manifold. So the boost level will "creep" up or even spike.
When you retard the timing ALOT you increase the EGT's quite a bit as well. Higher egt's = more manifold pressure = possible boost creep.
There comes a point when timing retard and adding boost become ineffective at a certain octane.
E85 is the answer to that.