Max Lobe Ramp For Solid Flat
hypothetical:
You have a 340 (engine A) that has 8.75:1 dynamic and should have 180psi of cylinder pressure turning with the starter. How much horsepower does it make and how do you figure it out?
You have a different 340 (engine B) that has a dynamic of 7.9:1 and should have 130psi tunring with the starter. How much horsepower does this one make and how do you figure it?
Which one is the bigger power producer? Why?
Maybe you can school me - I'm always open to other ideas.
If both of these motors are purpose build race motors running in the same class with the same rules. my money is on the 130PSI motor every time!
as an engine increases RPM it's volumetric efficiency goes up. this is because air is somewhat "stretchy".
At low speeds induction air is difficult to trap inside the cylinder. it's like trying to take a stubborn dog for a walk when it's leash is made of elastic.
you have to stretch the leash 5 feet to get the dog to move 6 inches.
(you are the piston, the dog is the air)
At high speeds, induction air is like a rabid dog towing smaller dogs on skateboards.
When the rabid dog hits a brick wall, the other dogs on skateboards have no choice but to do the same
(the brick wall is the piston at BDC, again the dogs are the air)
At cranking speeds, inertia tuning doesn't come into play whatsoever.
the 130 psi engine would probably rev harder and create more dogs on skateboards when the pedal hits the floor.
Sorry for the ridiculous analogy.