Okay, that makes sense - so I guess whilst we work to the right principals with our theoretical engine, then the BSFC should be constant.

Right - bed time - to be continued in the morining when my brain re-engages!

Thanks all who continue to contribue guys! Without the techhys, this would be just the rantings of a Building Surveyor!!

I will leave you with the following thought though.....

All we need is an engine that has variable compression, variable cam timing as well as lift etc, combined with our adjustable ports, and variable vein turbo, and possibly the most complicated map ever written - and we have the perfect engine!

JJ