We all know water injection helps to lower intake air temps. I don't think many people think about the possible benefits of cleaning the carbon buildup in the engine.

From this article:
"Pre-ignition is when the mixture self-ignites, not necessarily at the right moment! That's roughly how diesels work, but that's part of their design and their heavyweight engine structure reflects these loads. Carbon deposits in the chambers can become hotspots, sort of 'spark-plug wannabes', starting pockets of ignitable mixture. Exhaust valves that get too hot because of too much reversion or blocked coolant passages. Even a spark plug that is too hot for the conditions can have its tip glowing and messing up the ignition timing. These rogue flamefronts collide with each other and all together with the piston as it tries to move upwards. Nothing good can come out of this situation."


Scroll about half way down the article to where you see this:
<img src="http://www.max-boost.co.uk/max-boost/Gifs/grim_reaper_slashing_md_wht.gif">

He really seems to know his stuff. There's very good info regarding the balance between timing and boost/nitrous.

I'm also surfing for info because I couldn't figure out how someone can use a boost controller (AVC-R) set at 22-24psi and not blow the engine. The boost controller over-rides the ecu, so it can't lower boost if the engine knocks.

I realized the ecu still maintains control over timing. I guess you're OK knock-wise as long as the ecu still has enough room to pull timing, right?

Summary: I need AVC-R and water injection<ul><li><a href="http://www.max-boost.co.uk/max-boost/ignition_deeper.htm">http://www.max-boost.co.uk/max-boost/ignition_deeper.htm</a></li></ul>

 

Don't forget about fuel dump and throttle cut to keep you safe too.