ghost_22_47 wrote:The boost creep was a stuck wastegate.
Haha yeah that would do it.
I was running straight pipes to a fart can on my exhaust system and ran into boost creep from exhaust being too free-flowing. I herp derped and figured you may have been running into the same issue because you have a badass system.
Glad to hear you got it fixed!
I have to admit, your carbon coil cover with the badge strip looks cleaner and just better than my cover.
In regards to your A/F graph:
- Is that a single pull at full throttle? If so, what gear?
- If yes, you are leaning out/running a tad richer than I would prefer.
For premium pump gas, I'd want to see somewhere in the ballpark of a 10.7-11 A/F ratio while full throttle and at more than 6-7 psi on those turbos (3000rpm+). Stoic, non-boost situations should be in the 14.5-14.8 range.
If you choose to run higher octane unleaded (around 100), you can run in the 12-12.5 A/F.
From what it looks like, you're spiking up to 20+ A/F around 3100 RPM. That's not good if you are full-throttle. If you're not full throttle or off throttle, that would explain the spikes.
In general, you'd like to see a cleaner mix. For example: