I am no expert. I am just telling you guys what my motor builder told me he said that it is not as safe as running it farther away something to do with the way it burns in the cylinder. He did say that it takes alot less nitrouse to gain HP if you inject it directly into the manifold but it is not good on the motor.

 

Of course. I have hit the rev limiter from time to time with my Nitrous engine without it blowing up.

Do you really support the assertion that while up against the limiter under load of nitrous, all fuel and nitrous mix that comes in on the intake stroke stays in the cylinder, building up until finally spark returns?

You do realize that if the rev limiter is set at 9000 rpm there are 75 intake strokes per second that you are against the limiter. That is over 7 intake strokes of fuel, air and nitrous in 1/10th of a second.

The fuel mix does not have time, nor cool enough temps to liquify before it is forced out on the exhaust stroke. It enters as a vapor and leaves as a vapor......by and large.


You guys are silly[img]i/expressions/face-icon-small-happy.gif[/img] [img]i/expressions/face-icon-small-confused.gif[/img]

 

Tpsycho - the nozzles mounted after the carbs in the intake manifold is what a wet system uses like NOS or Nitrous Express. NOS is the system we use for the big shots.

My motor had a boss noss system on it. The nitrous jets were mounted in the snorkle tubes in front of the carbs. I was never able to get more than a 21 hp increase on the dyno from the boss noss......no matter how much we sprayed. Since the system was regulated, it would default to the bottle pressure of a cold bottle and stay consistently at that output. If you think about it, there is no way it could regulate the system but give you consistent output of a hot bottle unless the bottle was hot all the time. You can't manufacture pressure in the nitrous system if it isn't in the bottle.

So we went back to a wet system that will be going on the Sandviper for PS.

 

The fuel mix does not have time, nor cool enough temps to liquify before it is forced out on the exhaust stroke. It enters as a vapor and leaves as a vapor......by and large.


You guys are silly


First off there is no need for personal attacks. Some guys are only asking questions for things they have little to no experience in. Nitrous in jected farther away from the cylinder is safer and mixes better as it has time to gain some heat and prevent fuel from becoming liquid and pooling. Closer to the cylinder gives better cooling effect on the charge in the chamber and expands less taking less total volume giving you a denser charge but can create pooling in the chamber. IE fuel wash. Nitrous pressure is not as important as volume. You can make more power with lower pressure and higher volumes. Pressure is heat that is wasted energy.

 

What personal attack?[img]i/expressions/face-icon-small-happy.gif[/img] Do you mean "silly"? lol ouch! sorry about that. I meant it as a term of endearment for you and Goodsound specifically[img]i/expressions/face-icon-small-happy.gif[/img]

Now that you have changed the subject, I will ask you the question again.....

Do you really support the assertion that while up against the limiter under load of nitrous, all fuel and nitrous mix that comes in on the intake stroke stays in the cylinder, building up until finally spark returns?

One more.....

Have you seen a nitrous motor blow up for this reason?

Ok, just one more.....

Do you believe the rev limiter presents more risk in how it operates than the possibility of missing a shift or popping out of gear causing the motor to over rev while on the button floating valves and valves impacting the piston?


Simple questions need simple answers! [img]i/expressions/face-icon-small-happy.gif[/img]

Actually you don't need to answer, I know you are playing "devil's advocate" here............and before you complain about another personal attack, go look up what a "devil's advocate" is. It isn't as bad as it sounds[img]i/expressions/face-icon-small-wink.gif[/img] lol [img]i/expressions/face-icon-small-smile.gif[/img]

 

I am running a NOS wet system on my bike and my builder told me we could get 30+ out of it easily. I wanted to stay at 20 to keep things as reliable as possible.

 

Your builder knows your engine best. As you try higher levels with nitrous you need to understand it more and make sure everything is right because you have less margin of error.

 

TP we both have the same build and i run 30 all day long on both baby bikes. NO PROB BOB. just make sure your using the straight nozzles the 90's suck wait they blow but in the wrong direction.

 

Ron, I just figured out why Eric could not get more power out of the Boss system, and Coop just hit it on the head. Sometimes in life, you have to step back from what you know, and think if there is another way. I think this is the issue. I'm still willing to put up a Boss system against any other, win or loose. Remember, there is more than one way to skin a cat. While I dont think it really matters, the only benefit I would see you guys having on using a system such as Boss's, would be the lack of need for so many bottles, and the worry of keeping them at perfect temps. Just run it till its empty, switch bottles, or fill it, and run it again. You could watch the racin instead of switching and heating bottles. Just a thought.

As for the ignition stopping the nitrous from leaving the cylinder. That is incorrect. It will leave under no ignition aswell. Thats kind of a given. I have hit the rev limiter on mine (10,800) many a time, under full load.

As for a 25 shot hurting a stock motor, if you want to see what a stock piston looks like after a year of use, order you a new one. Cant blame nitrous cuz there's no rev limiter, and the valves float.

 

LMAO! Nice! [img]i/expressions/face-icon-small-happy.gif[/img]