compresion
 

Hi guys,
I know if you want to run a high boost turbo you need a low compresion engine, but what is the diference between running a high boost pressure on a low compresion engine and running a low boost on a high compresion engine? Why is it beter to have low compression rotors and a high boost turbo? I have been wondering this for a while.
Thanks,

ok, scratch that first attempt. the reasoning behind turbos is to change the displacement of the engine so to speak. you are cramming the same amount of fuel and air that say a 5 liter would hold into 1.3 liters (13b). now if you tried compressing that the same it would cause catuastrophic engine failure. by lowering compression, you are compensating for the added pressure already in the chamber.

I think I've asked this before, but I forgot the answer or nobody answered...

It was mixed in with other turbo threads, so it mighta gotten lost...

Anywho... What IS the difference between running high boost on low comrpession rotors or low boost on N/A rotors... It seems the same except you'll have more power before the turbo spools than you would on a low compression engine.

That is true! However with the high boost engine you can force more volume of air into the engine. The point of turbocharging isn't to make high pressure, the point is to flow more volume through the engine. More air moving = more power.

It's like I say, airflow = horsepower, whether you get it by displacement, or RPM, or forced induction, or chemical injection. It's all the same thing in the end - moving more air through the engine!