Re: Nitrous on a propane fueled motor?
I don't agree with Jimmy, but to each his own...
N2O (Nitrous Oxide) is two parts Nitrogen and one part oxygen.
When N2O is introduced as a LIQUID into the intake tract, it boils into gasses.
Most of the performance gains you see from Nitrous are from the 'Boil' when the LIQUID Nitrous Oxide hits the intake manifold and converts to a gas absorbing large amounts of heat in the process.
Cooling the intake tract will condense the intake Charge (Charge = Fuel & Air Mixture).
With the intake Charge condensed, you will get more Charge mixture than normal in the cylinder, and that's where the extra power comes from unless you use Massive amounts of N2O.
N2O is used because it doesn't 'Quench' the combustion like an inert gas would.
Like Halon, Carbon Dioxide, Argon, ect.,
Those gasses would affect the cooling cycle, but would also put the flame out in the combustion chamber.
N2O has the unique property of NOT Quenching the combustion cycle.
As N2O goes through the combustion process, it releases the molecule of Oxygen.
When N2O is used in massive quantity, the Free Oxygen can become enough to affect combustion temps, driving them up.
The common cure for the added Oxygen released is to add more fuel, there by avoiding a potential critical lean condition.
N2O is easy to compensate for, since it's Oxygen release is on a 1 for 1 incremental scale, instead of a heavy curve, that's why there are so many kits for street use.
(If the release was on a steep curve, Average Joe BumbleFu*k couldn't install or maintain the systems)
When we used N2O on our Propane powered drag car (A True Gasser!), we injected raw propane (Liquid) directly into the intake stream (Via NOS Fogger Nozzles), and this seemed to work fine.
Keep in mind you need to sets of fogger nozzles, N2O and Propane don't get along in the same nozzle.
(They don't expand at the same rate, One over powers the other and you will get a Rich/Lean condition)
I know the NOS guys were right on the stick when we played with the race car, and had a package that almost worked out of the box...
I suggest you find someone currently working with a propane/ N2O system and talk to them.
NOS is now owned by Holley (as in Holley Carbs), and ICE guys don't do Propane as far as I know, but you might give them a call.
I have no idea if NOS is still doing the strange stuff now they are a part of Holley...
(They used to try ANYTHING!!!! Lawn mowers, jet skis, you name it, they've done it!)
I know the guys that make the 'Bully Dog' systems (Propane injection for diesel engines) played with N2O in the early days, and maybe they can help.
I've been in a couple of the 'Bully Dog' equipped trucks (dual wheel tow vehicles) and I can tell you I'm impressed! The propane over turbo diesel is a complicated, but they seem to have worked it out, and I don't know how far they got with N2O, but it might be worth asking...
As far as the dual fuel idea presented, I guess it would work, but I have no idea why you would want to have two separate and complete fuel systems, one of which you have to build from scratch...