hey vapor and billy...where you boys at? scared to post?? we had this conversation at the shop the other day!! you 2 are getting called out as being n2o = f.i. supporters!! lets see what you have to say here in the public forums!!

 

Richard has the best explaination

its a power adder, but it is not forced Via Propeller(sp) into the combustion chamber so therefore i do not concider it FI

 

wrong, you are not forcing more air in. you are changing the chemical makeup of the air entering the engine. once the n20 leaves the orifice of the nozzle it has to be at atmosheric pressure...physics dictates this.

furthermore, if n20 really was forced induction (i.e. forcing more air into the engine) then why dont people just inject compressed air into the manifold through a sprayer like a Nitrous nozzle? do you think you would get any net gain that wasnt from a cooler intake charge??

and lastly it is not possible for nitrous to force more "air" into the engine as you stated Cronic. if any thing it allows less "air" into the engine. n20 makes more power becuse it allows more OXYGEN into the combustion chamber, by displacing "air". air is the common term for the mixture of gasses that make up the earth's atmosphere. as stated above 78% nitrogen, 21% oxygen, and 1% trace elements.

Scott

 

Damn Scotts smart

One thing I forgot to add in the debate with Tony and his theory on the direction of the nozzle creating a "jet pump" and adding...or atleast relieving some of the vacum....

Take a close look at my car and my nozzles. I spray 300 shot into the intake...but its NOT in the direction of intake flow...its at a 90 degree angle to flow. And again the nozzles are about two inches from the actual intake slot. If there was any positive pressure it would spill out the intake inlet. So this shoots his arguement down even further.

Also I said the MAP sensor was always in Vacum..which is true...but I said that the pressure would read like -100 KPA on motor and like -95 KPA when spraying. This wasnt quite a true statement. Its a little deeper than that. What we found was that as soon as you "hit" the nitrous. There is a small fluctuation in MAP just like a i said..maybe from -100 kpa to -95 kpa. But once the nitrous begins to combust in the chamber and spent gases flows out the exhaust the actual volumetric effiency goes through the roof. That makes our vacum pump (engine) more effective. The MAP comes basically back to where it started. And again as Ive said...at NO time does the MAP even remotely go into positive pressure. Its just a little burble. And like Scott sais..I believe thats mostly to be due to the displacement of air that would normally flowing through the intake.

 

Scott..I dont know if you caught all this the other day..but most of the arguement can be found here Tony Gets Owned

 

Hey buckethead
Only the pressure at the nozzle outlet is above atmospheric pressure. As the mix of fuel, nitrous oxide, and ambient air enters the chamber...its under vacum...just like it would be NA.


Ya know we did these experiments to find out how much Nitrous a given motor could ingest. I honestly figured you would reach a point where you where injecting almost 100% nitrous/fuel in a motor and basically displacing all the air that would would normally come into the motot under vacum. But like I said...what we didnt realize...the more you spray the more VE the more you can spray the more VE.........

Im sure on a 2.o liter motor you could find that point...but on mine I believe id be spraying around 1000 hp worth of nitrous or more.