nitrous on a motorcycle

[2fast4u2c]

I run between a 140 - 200 hp jetting for 1 mile and can get 2 runs from a 5LB bottle

Guy

[racer x]

I run between a 140 - 200 hp jetting for 1 mile and can get 2 runs from a 5LB bottle

Guy

If that is a four cylinder motor. with 4 nitrous jets and 4 fuel jets.
 
If I want to run a 2 cylinder bike with 2 fuel jets and 2 nitrous jets making 14 to 20 hp .Then I would use 1/10th your total volume ? Is it that simple?

[joea]

racer x......they are ALL variable cylinder, variable displacement engines.......

...using variable amts of nitrous....depending on the day...run..etc..

nitrous.......invariably variable.....

[racer x]

  I found the Dyno Tune web site. It had lots of info and Kits They also have a jet calculator.
I entered 7.5 lb of fuel PSI and 1100 psi of nitrous pressure. For 15 hp it said 16 and 18 jets. BUT that is ONE jet and that is a fogger system.\
 http://www.dynotunenitrous.com/store/Scripts/Jet_calculator/nitrousjetcalc.asp

Do I then divide that number in half and use 8/9 jets? I know it is just a starting point.

http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=174
They sell a KIT for a 2 cylinder engine . I don't think I can get those nozzles to fit. I can use the 90deg style but That will be a tight fit.
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=250

that KIT says 18 hp jetting comes with it.Should I buy that and just got one step smaller with the jet size?

[2fast4u2c]

You would have to custom make jets if you want to go much small than a #16 I think.

[racer x]

  That is what I mean when I say I am in uncharted territory.
How about lower bottle pressure?

[Beairsto Racing]

Try contacting the BuddFab Streamliner guys...they have experience spraying small engines.

[wfojohn]

These replies are being very helpful to me as well and I am feeling more comfortable about nitrous reading this, I just tried the calculator racerx posted and trying different imputs sheds a little more light on things.

Thanks for what has been posted and please contribute more if something important is lacking, Jon, thank you for the website.

[racer x]

This is all a learning experience and it will be fun to see it go.

[Stainless1]

 I found the Dyno Tune web site. It had lots of info and Kits They also have a jet calculator.
I entered 7.5 lb of fuel PSI and 1100 psi of nitrous pressure. For 15 hp it said 16 and 18 jets. BUT that is ONE jet and that is a fogger system.\
 http://www.dynotunenitrous.com/store/Scripts/Jet_calculator/nitrousjetcalc.asp

Do I then divide that number in half and use 8/9 jets? I know it is just a starting point.

http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=174
They sell a KIT for a 2 cylinder engine . I don't think I can get those nozzles to fit. I can use the 90deg style but That will be a tight fit.
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=250

that KIT says 18 hp jetting comes with it.Should I buy that and just got one step smaller with the jet size?

RX, using the calculator just figure half the desired HP if you are planning a 2 cylinder, 1/4 for a 4.....

If they have jets in a 10 HP kit buy 2....
As suggested you may need to buy jets, solder them closed and drill holes... Flow the learn pounds of fuel to pounds of  N20 and you are set.  The calc should give you good starting drill sizes.
Again good luck.... With N20 it is better to have a lot of luck and a little skill 

[racer x]

 Thanks

    The Kit I posted comes with 18 or 34 hp jets. 18 is my magic number .I need about 50 hp to get a" D "licence @ 125 mph. I have lots of experience reaming jets because I work in a scooter shop. Personally I hate to do it .I don't feel it is very precise. I always try to use new jets .But some times it is quicker to make a 50 dollar scooter run .
I developed a way to measure the hole and depth of the throat part of the jet.
So my plan is to buy the kit and solder the 34 hp jets closed then measure the 18 hp jets . Then I will need to figure out Half the flow rate.
I do know half the hole size is not half the flow rate.

I will put the system together OFF the bike. and spray nitrous for 10 seconds . Then measuring bottle weight I will make my best guess till I spray half as much as an 18 hp shot will require.
That should be a 9 hp shot and a good starting point.

Dose this sound logical?

[Cajun Kid]

Eric,

Yes it sounds logical... but be careful,, as logic many times does not previal with power adders.

Back in the early 80's when I was drag racing Suzuki's (not much info and parts available for N2O back then)
We used logic in place of experiance with N2O.. and lost 2 engines in two weeks.. I have not tried N2O  since..

Have fun, good luck and do what you are doing here,,, asking the folks that DO have many years experiance with N20...

Our knick name for N20 back them was Ka-boom juice...

Charles

[Seldom Seen Slim]

"If you spray - you'll pay!"  Or -- "If you're spraying -- soon you'll be paying."

[racer x]

Speed cost money. I just have to spend it in the right places. That is why I have spent so long tweaking the bike on the stock motor.

[Cajun Kid]

Eric,  I feel confident 125 is in your future with the lil 250.

Keep the faith....

Charles