NITROUS OXIDE ( nos / n2o ) advice forum

one more B-King will run on WON too.
Sweet.

Now as i restudy all the instructions i found two different numbers to calculate the jets.
Strange

In the Streetblaster 50 wet instructions can be read : http://www.noswizard.com/pdf/SB75%20UK% ... Manual.pdf see bottom of page 11
Nos to fuel > 1:2 for gravity feed
So a 30 shot would be : 60 jet N2O and a 120 jet for fuel.

In the instruction: Metering jet installation http://www.noswizard.com/pdf/Jet%20changing.pdf see page 2
there is a rato of 1:6 ????? Would be 6o N2o and 360 for fuel ??
The problem and confusion is caused by;
1) The potential difference in the head of fuel above the point of injection. You'll need a smaller fuel jet if your fuel level is higher relative to the Venom injectors, than if it was relatively low.
2) The pipe lengths and sizes along with the type of distribution block, all affect how much fuel will reach the engine in a given time.
3) Different engine/carb/s combinations create different amounts of vacuum in the runner and that affects the jet size required.
4) The amount of nitrous you add, affects the amount of vacuum in the manifold.

So ,if i start with a 60 N2O jet for 30Hp

What is the right fuel jet size for gravity feed ?
The safest, simplest & quickest way to determine that, is to start with the biggest you have available and carry out a brief static test. It should then be possible to judge what amount of reduction in fuel jet is required (if needed), then you can zero in on what produces the best results. There are other ways to do it (like measuring the fuel flow at the injector and applying a correction factor) but the static test method produces the most precise results.

Why not use a paper filter (oem suzuki) to fog throu ? i ve read this in another post.
On the Busa i use a K&N but the carbed SRAD runs better on OEM.
Paper isn't strong enough to stand being blasted with nitrous and as it should be exiting the injector in a near liquid form, it would at least wet/weaken it, although it 'may' handle a small dose. Paper is also a good fuel, so if you had a backfire, the paper filter soaked in nitrous would burn at an accelerated rate.

If i keep the short piece of tube even another bended one ,it could "hold" ether the d-block or showerhead in position.
Will mount the red hoses and see how it fits.
That's true but it still needs to do its main job correctly first/aswell, so ensuring a 'correct' feed to the shower head is most important. BTW it will probably work OK due to the flow having to run uphill even with an elbow but it could be worth following my advice just to be sure.

In the elbow of the d-block was a small black plastik reducer.
am i right not to use it for the fuel ? (read its just needed for nitrous)
Nitrous is the main reason for the corrector but it might help the fuel distribution, as long as it doesn't restrict the fuel flow to less than you need. Some brief flow tests will prove if that's the case or not.

Is any orientation for the showerhead recomended ? ( as horizontal for d-block)
As long as the fuel has to run up from the outlets it should be fine in just about any position but again for added certainty, having it upright will ensure it performs its best.

regards
Bernie

Fuel cell arrived this afternoon.
Looks nice.

Found a better place to fix the pulsoid.
Much better

Will mill a bracket to hold both pulsoids side by side there.
Good idea

This way it aims straight towards the venoms. Angle is about 30°-40° and i need less bendings in the polys.
Think about leading the upper outlets to the middle two cylinders to get theese a bit richer (for heat) if there will be any unequal flow of fuel.
That might work if needed.

Cant use a pipe from pulsoid to showerhead at the moment as i didnt see that the inlet thread of showerhead is bigger than 8x1 and forgot to order the nuts to fit a 4mm pipe to it (same on elbow) .
Get them on friday and do it as you mentioned with a straight tube beetween.
Think that should be straight about 2"
You'll need;
1 x http://www.noswizard.com/nitrous-ancill ... 4mm-f.html
Then you'll need a short section of 4mm SS tube and then you'll be able to use the single metering jet at the Pulsoid, as I guess you've figured out.

I post and write so much as i think other users can benefit from your suggestions too.
That's exactly the reason for why I like to deal with all my customers this way, as it hopefully helps more people more quickly, as well as keeping my work load down a bit.

By the way > what do you think about membrane fuel pumps (OEM on many carb bikes)
Not a lot as they aren't much use for carbs never mind nitrous.

Have a new mikuni left and in a doubt of fuel flow as fuel polys will be about 18cm each.> could it put just in fed line of pulsoid. Verry easy install and only a vac line to connect.
I know one more part to fail but would deliver the fuel quicker.
Only by a little and then it its likely to be inconsistent, so I wouldn't bother if I were you.

Nitrous lines will be about 2 feet to reach the ramairs.
That should help to match the delivery times.

Have diferent SS tubes and match it to same inside diameter as red polys.
You don't need to worry about matching the SS to ONE of the nylon pipes as it's feeding 4, so the bigger the better.

Carbs suck . So easy on EFI
Yes I know.

But we want to run this old 96 carbed SRAD on stock engine to enter the nines.
Sweet

Looks fine to me, what type and grade are they?