Quote:
Originally Posted by CSG Mike
Chemical state does not change composition.
Nitrous itself is 33% oxygen by molarity, or 36% oxygen by mass.
Thing is, you can't displace all atmospheric air with N2O.
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On further retrospect... molarity is what is important, not weight, since it is a gas. Furthermore N20 disassociates in the cylinder (it requires high T), not the manifold.
So let's say you ran on 1 atm of pressure of PURE NOSS!!!!Z!!11! (/s). In effect, since each mole of N20 dissociates into half a mole of 02, that would equate to 50% atm partial pressure of 02.
So depending on your mixture of air vs N20 it would be somewhere between 20 and 50% effective 02.
edit (because math is fun!!!): 100% N2O would be 7.35 PSI of O2. To get that much with FI, given 20% of O2 in air you would need 2.5 atm worth of air, so an extra 1.5 atm of boost, which equals 22 PSI of boost!!!! just from the oxygen alone!