08-10-2012, 10:42 AM
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#55
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Rotary Fanatic
Join Date: Feb 2008
Location: Slidell, LA
Posts: 191
Rep Power: 18
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Quote:
Originally Posted by RICE RACING
It is incorrect on a racing engine (run on the street) to assume it has EGR at full load and power, at light load yes, but at full revs/power no is more the answer, unless its choked up.
The overlap does indeed help to get rid of exhaust gases, this is how Volumetric efficiencies of around 117% are achieved........ even back in the 60's and 70's.
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Does anyone have any clear graphs of the pressure traces at the exhaust and intake ports?
Mazda has one shown in Yamamoto's book but it is very blurry.
Averages from gauges don't show as much as we would like.
Barry
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