I personally think the BKH engine is plenty strong as long as you stay on top of it. It's a beatiful machine and if you take care if its shortcomings (timing tensioner/ guides and it's known oil and coolant leak spots) it will run forever. It's no Toyota engine of course, it's very sensitive as most modern German engines are. But as long as you give her what she wants, she'll be good to you. Like a wife, lolol.
With that said, I think that from a physical standpoint, this engine can take boost (within reason of course, and assuming you already did a compression and a leakdown test to check its health). The limiting factor for the C6 chassis is tuning and at some point, the transmission (I suspect the 6HP19A having a lower threshold than the 8HP in the C6.5s, but that's just an assumption based on feedback from modded C6.5'ers).
And this is something that pisses me off about this car. I really do love it, and I wish I could do engine stuff to it. But A- No one makes a cookie-cutter tune for those that just want to do bolt-ons (
as if we had bolt-on, HA!

), and B- I've yet to find an end-user tuner that has our car in their list of software compatibles (such as EFILive or HPTuners). I get upset about it because, like myself, there's a few people on here with enough experience to do custom turbo setups and do the tuning ourselves. But with no realistic way to properly tune it, we're kinda stuck. I've contemplated doing indirect tuning with piggybacks like Greddy eManage or hell, even an Apexi VAFC2 (oh yea... I took it back to the mid-2000s kids! Nelly had just broken out with Country Grammar

). But without having direct control of ignition timing, you don't really have much of a margin of safety with our 12.5:1 compression. You can fix that with E85 (but no software to tune with...). You can also
bandaid it with water/ meth injection. But again, that's a bandaid that should never be tuned in conjunction with (you tune it on boost by itself, and reap the added power and safety from the water/ meth). The day the injection's pump/ relay/ switch fail and you go into boost, your rods will ram through the block. One COULD go full standalone (a Haltech Elite 550 starts at $850). But then there's the issue of if the car will run at all with a standalone in place of the ECU... since the immobilizer, cache module, and various other modules in the car all work in conjunction with a functioning ECU. I'm sure there are ways to make that work, but it's certainly passed my paygrade.
Anyone here have experience with standalones on cars with CANBUS? I honestly think this would be the only option left for C6 owners if the rest of the modules can be kept happy. Wire up a standalone, add one (or 2, one for each bank) wideband o2 sensor, and tune it yourself. Once you can tune the car, the boost is the easy part (if you have the experience of course, lol).
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