Ideal Compression Ratio - 350 to 500bhp

[Error404]

IIRC it isn't mapped on it, just a safety measure? Probably I am wrong, who cares - you guys know far more than most on the subject.
One thing I know for a fact is that there is no such thing as a free lunch. Therefore a compromise has to be reached; you can't run a exponentially high or conversely low CR. What Andy would like to know I think (as do I) is what is the best compromise between on, off and transient boost response and reasonably OEM level of headroom for a moderate powered motor up to max 500hp

[DJones]

IIRC it isn't mapped on it, just a safety measure? Probably I am wrong, who cares - you guys know far more than most on the subject.
One thing I know for a fact is that there is no such thing as a free lunch. Therefore a compromise has to be reached; you can't run a exponentially high or conversely low CR. What Andy would like to know I think (as do I) is what is the best compromise between on, off and transient boost response and reasonably OEM level of headroom for a moderate powered motor up to max 500hp

I was always told 8.5:1 which is what mine is and it made 480 on lower boost than normal...

[Error404]

Is yours mapped on meth or just there as a sweetener / safety measure Darren?

[DJones]

No not mapped with it just provides a little top end protection from 1.1 bar onwards .4mm jet.

[A80Avant]

That's nice. Another example that you can without mapped WMI have more than 8:1 and not have the engine blow up.