I am seeking some insight towards understanding my car's health status. First off, the car: 2010 Audi A5 Coupe 3.0 TDI. CCWA and S-tronic. (135 000km on the clock) BMC air filter, 76mm Downpipe (rear boxes cleaned out), 550x230x65 Intercooler, ECU software and oil-to-air oil cooler. VCDS scan shows no error codes for ECU or TCU. My gut tells me that my "Governing factor exhaust temp" is interfering maybe more often that it should. Suggesting that something is maybe acting out or I am asking too much from the car in its current state (supporting mods not supporting enough). I do track events with the car, and some tracks have straights long enough to to see 3rd to 5th gear pulls. Ambient here in South Africa is 26-35 degrees Celsius for most events during the year. Before these brutal events happen later in the year, I would like to try and find out if the car's health is off before I break something. The ECU software: EGR and DPF disabled. Boost peaks at 1.78bar and drops to 1.43bar up top Peak "Mean injection quantity" is around 72 mg/stroke At a recent Dyno event, the car made 199.6kW and 602Nm (all wheel figures) I did ask not to push the car too hard as I do lean on the car hard during track events. So reliability first. On a 34 degree C day, a 5th gear pull will raise the intake temp to 61 degrees. Colder days it will peak to 53, but it gets there pretty fast (4-8 sec from WOT). The latest log I ran today: (26 degree C ambient) Road is relatively flat 5th gear, IAT = 34.6, EGT 515. Apply WOT and in 3seconds: IAT = 38.1 and EGT 846 Some of the torque limitation even happens around 3800rpm. Max EGT I saw from all the logging was 891. I also ran a partial throttle (70%) in 5th, from IAT=36 & EGT= 548, 2.2 sec later: IAT = 38.7 and EGT 854 I did a 1/4 mile event Yesterday. Only managed 14.3 at 152km/h (94mph). The TCU is stock so it's launch is average. I could feel the car limiting torque in 4th. To me it seems as if the EGTs go up faster than it should and I am experiencing more torque limitation as a result. With my limited knowledge, I don't think the software is doing something silly. Mean injection is not extreme and there is good boost to support a clean burn. Air intake temps don't seem to be super high even though the ambient is hot. So not sure the supporting mods are causing this regular limitations. I am wondering if unhealthy injectors can cause this. Perhaps some un-burnt fuel is burning in the manifold. VCDS injection deviation at idle is less than 0.5 and more than -0.4. But I can see a slight white haze from the exhaust after idling for a while and during driving the deviation on some injectors go to 2.7. I am going to send an oil sample in for lab testing, but I don't see any rise in oil level. Any input will be appreciated. Either I am over thinking this or something is being a party pooper.