Horsepower Per CI vs VE
Horsepower Per CI vs VE
(OP)
Hello all,
I am trying to find a correlation between Horsepower per cubic inch and Volumetric Efficiency. I read that some prostock engines are making better than 2.5 HP per cubic inch at 9000 plus RPM. Is there a path back to VE from this as a start?
It's the math problem again :-(
PFM
I am trying to find a correlation between Horsepower per cubic inch and Volumetric Efficiency. I read that some prostock engines are making better than 2.5 HP per cubic inch at 9000 plus RPM. Is there a path back to VE from this as a start?
It's the math problem again :-(
PFM





RE: Horsepower Per CI vs VE
http://www.loeff.d
RE: Horsepower Per CI vs VE
RE: Horsepower Per CI vs VE
I run a 351 cu/in engine on alky and get about 1.5 hp per at 6800 rpm through a 4 barrel and long tube stepped open headers.
This is far from pro stock performance but I am limited to rules and know there is a great deal more power there even without increasing displacment.
It would take a cam change, more airflow/rpm and compression.
RE: Horsepower Per CI vs VE
http://www.epi-eng.com/index.html
RE: Horsepower Per CI vs VE
It says nothing about the means used to get that power. It is just a catch-all term that includes such things as VE, compression ratio, combustion efficiency, friction, and rpm. It also does not consider if the engine is supercharged or not, unless you know that or it is stated. And again, it removes the bigger is better syndrome from the equation.
As far as engine speed goes, you could have two almost identical engines and of the same displacement. If one of those engines can be pushed to a higher rpm, it would have a higher hp per cubic inch.
Bmep is a better term because it eliminates engine speed from the comparison.