Hello guys I'm new to this site and hope im posting in the correct spot. I find myself searching here sometime for reviews, opinions, and diagnosing issues other people may have had as well. I figured I'd join in and ask for some help more directly.
Right now I am tune with GH, 3bar, catless, intercooler, 160 thermostat, and gapped plugs. The car feels amazing and Matt's shifting is by far best I've experienced. When sending a log, he informed me that I'm having a good amount of kr. I notice it on the logs (from what my limited understanding gives me), and it appears to go around 3-7 degrees on knock sensor. Its mostly on wot. Car feels good and has no lights or drivability issues.
I'm also logging with ortiz to see how his tunes go as well. But with this false knock, he isn't going to send a revision until we figure it out. Its not as bad with his tune, but its happening in lower boost lower timing still wot. I've been told its either a rattle or gas is crap. I use 93, did 3 different stations with no resolve. My oar is -.96 which i thought mean gas is good, but I'm super new to tuning and just recently learned datalogging so idk entirely if that matters.
Basically now I'd like to get some ideas on what to check next. I am going to try a mix of e85 like Matt suggested to see if it helps, that'd be easy and nice if so. Other than that, I hear a slight rattle (similar to the sound of a wastegate rattle I would hear on my subi and bmw) coming from engine bay or underneath, very hard to pinpoint. Isnt the fuel pump like I originally thought cause that thing is noisey. It happens when I rev it to like 3k and let off. Couple seconds of rattle. Can't capture in video cause car is loud as it is. It will also stay constant around 2500rpm holding it there.
So its potentially something that could be creating the false knock?
I've checked the wires where they rub for some people, mine were perfect it appeared. Either way I covered them up with some fuel line and zip ties. Didnt change anything.
Are wastegate rattles something common with these cars, or is there a heatshield people have problems with? I dont really know how to chase this but must find it in order to proceed tuning with ortiz. Thanks guys -DJ