NITROUS OXIDE ( nos / n2o ) advice forum

Fellow students of NOS-Wizardry, are you a person who thinks nitrous is only for large engines such as cars, trucks, and motorcyles? Think again!

Enter Project G-O-D, the Goped of DOOOOOOOM!!!

The following is a project that was just a crazy idea that came to my head after seeing some videos containing footage of really crappy, unsafe, and unreliable nitrous systems on small engines. So I decided to do the same with a REAL nitrous system consisting of a WON SFBK2 kit ( located here ), which adds both nitrous oxide AND a fuel source to the engine, which is the only RIGHT way to do it. Other kits only run DRY systems meaning that the user has to run the carburetor excessively rich, which brings down performance off nitrous considerably AND limits the total amount of power deliverable. With the SFBK, I can add as much as 50bhp! That's almost 50 times the output of this engine!

Here we go:

Here is the Goped Sport Model being mocked up with the kit. The engine is a 23cc Zenoah Komatsu G23LH: 1.2 Bhp. This engine is perfect for initial testing because it has a low compression ratio and conservative spark timing. This engine really is Mr.Reliable as their durability has been known to last over 20 years! These scooters came out with these when I was a kid about that amount of time.


The scooter is driven directly by the crankshaft with an interchangeable drive spindle: making direct contact to the hard-rubber tire.


Here is the SFBK2 mocked-up on the T-bar. Note that I'm using a Butane liquid gas cannister for camping stoves and they can be purchased for cheap at big outdoor sports depots. I couldn't find these near me for some reason, but eBay was the answer to that problem. The other problem is that unlike outside the U.S., these cannisters are unthreaded and require an adapter to work with the pulsoid. Luckily, the Wizard was able to located these on eBay for me and they were dirt cheap! Additionally, they are quick-turn (1/4) attaching, which means I can change a can out in no time and they self seal so there is no danger of spraying flammable gas all over the place! This kit is awesome already!

Here is the close up of the connections to the pulsoids. Note the adapter required for U.S. butane/propane gas cannisters:



Here is the bottle getting chilled just prior to servicing:



Since I'm a bonified 'Mrrrrrrican, I use -4AN size bottle fittings so I needed a way of servicing the bottle. Because there is no bottle valve on the SFBK, the bottle must be serviced through its pulsoid. The only way I could service the bottle was to connect it in series to my car's system! In order to service it quickly, I removed the jets from both pulsoids and applied power to both of them; the bottle filled up to its maximum very quickly. If anyone tries to do this, (WHICH I DON'T CONDONE THIS; YOU DO THIS AT YOUR OWN RISK!!!) when putting things back together, MAKE SURE YOU REINSTALL THE JETS TO THERE ORIGINAL POSITIONS; you don't want to blow an engine by delivering 250bhp worth of nitrous with 25bhp or whatever worth of fuel LOL!!!

Here is the bottle with the pulsoid weight full. The bottle with pulsoid empty is 813g and 1163 full: the bottle holds 350g worth of nitrous. So I'm practically spot on!



Oh, and here are the lines routed into the engine intake airbox:



Here is the finished trial install. I know its messy, but it's quick to remove in case I want to take it off and use it somewhere else. I'm using a lawn mower battery because my nitrous pulsoid won't open with a 9v battery as I intended. I think it's just the high nitrous pressure making the pulsoid harder to open and the voltage drop can't overcome it. I'm currently finding a better solution, but this will do for now; I can still ride it okay.

And my garage is messy as hell!! I just moved into this house so I'm still settling in with things.

Here's one picture that inspired me to do this project. The Wizard has his dark secrets!



Here is a link to a video of the system being tested:

Goped WON Test Video


There's more to come!!! HAPPY SPRAYING!!!

Some additional notes for those who wish to duplicate this project:

1) I use a jetting that will deliver 2.5 bhp to the engine. However, the smallest jet from WON is 5 meaning the minimum amount of fuel a system can deliver is 5 bhp. The Wizard gave me jetting that is 50% excessively rich in order to deliver the 2.5 bhp needed for the initial testing of this project: that is 5 Nitrous 5 Fuel for 2.5 bhp hit, as opposed to 10 Nitrous 5 Fuel for a 5 bhp hit.

2) I want to be able to shoot a MUCH LARGER hit of nitrous eventually so I made a homemade brew of petrol with toulene to produce a mixture around 97 octane; plus or minus 1. This should allow me to run some big shots (for the size of the engine) and propel the scooter to ludicrous speed!

3) Due to the new fuel mix, the non-adjustable carburetor wasn't happy. The engine ran VERY LEAN and had no power; the solution: AN ADJUSTABLE CARB. Luckily, I had these scooters years ago and kept the carburetors and other parts. The first carb worked right away and the engine ran fine with the fuel mix after making a few adjustments.

4) If you do intend to do a static test on a 2 stroke that needs a fuel/oil mix (meaning non-oil injected), then do the test very BRIEFLY. The engine will rev up rather high during the test and a lack of lubrication can cause damage as the fuel source from this kit has no oil mixed with it! Also, consider running a richer oil ratio when using nitrous. For example, run 32:1 as opposed to 50:1 fuel/oil mixtures.

If my results are successful, I'll be using a much more powerful engine and other goodies to propel this Goped Sport to insane speeds (for a small, hard-tire scooter). It's a good thing I have health insurance!

This engine is 29cc and is rated at 3.5 bhp! With the expansion pipe, it should hover around 4 and that's without nitrous! There are a couple of things I need to do to it to prepare it for nitrous use like reducing the compression ratio and retarding the aggressive timing, but it should be a SICK RIDE!

This is a cool project. I've been thinking it would be cool to do a mobility scooter with a petrol engine and fit nos to it hahaha

Just to update:

Here's an email I just sent to the Wizard:



Hopefully, I can get some video footage of the difference in power within the next week!

WHAT A GOOFY AND FUN RIDE!!!

EXCELLENT thread and can't wait to see the video.

Would you believe that some time ago, a bunch of assholes on a road going scooter forum (the type with 50+cc engines and seats, etc.), wouldn't believe that it was safe to add a WON nitrous system, to an engine of 50 + cc , so this result would have been handy back then, as it 'should' have proved what dumbass fools they are.

Here's a WOT test: GOPED WOT TEST VIDEO

Here's an overview and tour of my other scooters video: GOPED SPORT TOUR

LOVE the title of Goped of Doom and your video's are great, can't wait to see a video of the Goped in action.

Have you seen this video;

https://www.youtube.com/watch?v=VqYNRGfflPk

I'm sure you could beat that 'record' with just the one engine.

To add:

It's a lot scarier going over 40 on a hard tire scooter, hence why I'd rather go hard tire rather than air tire. Air tire feels like it's been done too much.

Understood on all counts and rather you than me.

Another video with some REAL testing!

GOPED OF DOOM TEST RUNS!!!




Trev, maybe this should be some sort of sticky?

This project is as crazy as mine hahaha so I have shared your video on my facebook page lol
www.facebook.com/pimpedwheelchair

LOL! Awesome!

Thanks for helping spread "The Word of the Wizard!"

There's going to be a lot of videos about the details of WON systems compared to other garbage out there. I'm sure to get a lot of flack for it, but the key is to not argue with anyone and stir up the bees. Just wait until they sleep, then take the honey!

BTW

I've only just scratched the surface with that vid LOL... as long as I can keep the engine lubricated and cooled, it should make great power! Then, I'll move on to the new engine that I have; that one will scream on the spray!

Great job on the video and as the SFBK might be how most people start using nitrous in future, I've made this a global post now, so it will be at the top of every section.

It would be handy if you could arrange a timed test of with and without, to give the improvement an actual figure.

I'll try to get a timed comparison; it'll be difficult to convince others without some real equipment so it eliminates video editing as a bias.

Oh Happy Day!!! Goods have arrived today!!

I have some parts to get my chain driven scooter running and BIGGER JETS for the DOOM GOPED... Now I can lean the Nitrous/Fuel mix to step up towards that 5 Bhp hit!!

So here's the game plan for the G-O-D: 2.5 hit (5N:5F) > 3.75 hit (7.5N:5F) > 5 bhp hit (10N:5F)!!!

I'll also be changing the spindles around to calculate my max speeds. To help me do this, I purchased a tachometer that will record the max rpm achieved during a run and plug that number into a special calculator for determining speed per the gearing and rpm or mph.

I may also have to begin making some exhaust system mods in order to dissipate the increased heat in the exhaust side of the cylinder. At least I've proved that a noticeable increase can be had while remaining BONE STOCK!

Update:

I uploaded a HOW-TO guide for changing out the fuel canisters on the SFBK with the adapter for U.S. spec'd cans.

SFBK FUEL CAN REPLACEMENT VIDEO

Top job.

Update: Just added a larger drive spindle to achieve more top speed! In my last video, I stepped up to a 3.75 bhp hit and the acceleration was crazy fast. The only downside is that I didn't achieve much more top speed (although it is a significant increase), I feel like the exhaust system, the cylinder porting, and the ignition timing are holding it back significantly, and adding more nitrous will not be as effective.

I can't wait to ride it now!

(Wizards of NOS) Goped Spindle Change and Engine Mount Mod

HAPPY SPRAYING!!!

UPDATE:

Fellow students of NOS Wizardry, here's a video that I am CONFIDENT will put a grin on your face or die laughing at the difference a WON kit makes on ANY engine and still continue living a full and healthy life!

(Wizards of NOS) Goped Sport 950 Spindle w 3.75 Nitrous Hit Speed Tests