[SCOBRAC]

All internal combustion engines run on three things.. fuel, air (oxygen) and spark.

Superchargers / blowers / turbos of all types all do the same thing. They take ambient pressure, barometric pressure (regardless what it is) more at sea level less at 10,000 feet and densify it with the fuel air mixture.. Literally compressing the gasses.. The more the better.. (to a point) Too much pressure and well, we have all see blowers explode.. Detonation is a problem you can't run 34 degrees with a blower.. You might only need 20.. or 25. Too much ignition will be the fastest way to a new set of pistons or worse.

As far as 10:1 with a blower.. You can't.. 8.5-9.00 is pretty standard with a small blower. It all depends on the blower. I have seen CR's as low as 6:1 with lots of blower.

The more gasses you oxidize the more efficient the engine, No2 (nitros, as wellas nito-methane for that matter) does the same thing but in a different way..


The thing is... WHY?? You can make tons of power on a 10.5:1 small block or even a big block. I see Chevy guys getting 635 hp and even the small blocks right at 500.. 500 hp in a 2500 lb car is 5 lbs per hp.. NASCAR winston cup cars are somewhere about 4.5 lbs per hp..