[TurboTR]

How much do you plan to retard the timing for your nitrous?

You probably remember me correctly; in fact you built a max effort 200R4 for me around the mid/late 90's. I worked at an engine research institute for several years around then as well.

Personally I'm comfy with about 1600 psi peak on my own engine. I don't know how much more it could take safely, but when I hold it ~ to that it shows no gasket damage, etc. It's probably on the very conservative side. But in general most engines would probably do well to stay below 2000 psi peak. Even for heavy duty diesel hardware- ours is not as strong.

Don't confuse what you get from BMEP calcs with real cylinder pressure (as we've mentioned before).

The good news is, a statement like "Nitrous works by drastically increasing cyclinder pressure...", which you see in any popular rag, etc is... dead wrong in fact. At least when done correctly- it can of course drastically increase the cyclinder pressure, but then you need to make sure to include a good quality engine parts broom in your tow rig too. That statement (and equivalent) is generally accepted because it seems to make intuitive sense at first, but the reality is that the engine simply cannot keep a lid on and withstand drastically increased cyclinder pressure (along with the drastically increased forces on everything). The real mechanism for increased power is not as obvious, but fortunately for all of us who love drastically increased power it's not via "drastically increased cylinder pressure".

TurboTR