SBjet
El Presidente for Life
- Joined
- Dec 20, 2007
- Messages
- 2,642
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Mazda has a really high compression gas engine, with a really low compression diesel engine.
http://www.mazda.com/mazdaspirit/skyactiv/engine/skyactiv-g.html
Now they are saying they are able to do this because they are doing a great job of scavenging the exhaust. Well I always thought you could easily scavenge more exhaust by shortening the exhaust pipe, but that could lead to too much heat/lean and would start burning up your engine parts; exhaust valves, pistons.
And what about the low compression diesel? If high compression makes power, why do you want to lower it?
http://www.mazda.com/mazdaspirit/skyactiv/engine/skyactiv-g.html
Now they are saying they are able to do this because they are doing a great job of scavenging the exhaust. Well I always thought you could easily scavenge more exhaust by shortening the exhaust pipe, but that could lead to too much heat/lean and would start burning up your engine parts; exhaust valves, pistons.
And what about the low compression diesel? If high compression makes power, why do you want to lower it?