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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,232
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You can instrument the cylinders with pressure sensors which is done all the time and get an actual trace of the cylinder pressures during the combustion cycle. I work for an engine component supplier in Detoit and this is routine on engine dynos. You can calculate BMEP from there.
However, I have seen the values published somewhere in literature or do a search on the web. They published values for lots of engines, like the 917 flat-12, motorcycles,F1 cars, etc. Sorry I cannot remember where.
Of course that is the advantage of a turbo in that you can increase the BMEP via boost without monkeying with Comp Ratio or internal design of parts. Still limited by strength of components and cylinder head seals.
Old 09-07-2007, 08:59 AM
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