I just installed a casper knock detector in my TTA and took it for a test drive last night. After letting the temp get up above 160, from about a 3mph roll, I cracked into it on a long strait road near my house. I noticed that at WOT the guage went up to about the middle of the orange lights (about halfway to red indicating severe detonation). However my scanmaster only read about 0.7 deg. of retard. I tried it again after raising the timing on the Turbotweak chip from BL 125 to 126 on 1st and 2nd gear (about .35 deg of timing advance). I hit it again. This time the guage went to red as soon as I hit WOT on the downshift but my scanmaster only read 2.3 deg. of knock at the same time. So my question is..... what should I go by, the guage, or the scanmaster? Is 2.3 deg. of knock retard considered severe detonation?