NITROUS OXIDE ( nos / n2o ) advice forum

Hi Eric,

One of our international customers would like to know EVERYTHING about how you've got to where you are now and what your achievements are.
Now I guess most of the info is in this thread but it's rather long and stretched out now, so would you mind starting another thread (say in our readers rides section), giving the FULL story from when you first decided to race the bike, right through to your future plans.

I am really anxious to dyno this set up. I really think the nitrous will be better with more lift .

I would love to start a new thread. But I can find the readers rides section.

I do have a web page. www.darkhorseracing9623.com

Sorry Eric I got the section title wrong, here you go;

viewforum.php?f=28

On the dyno the bike is running great . 32.65 hp on the motor and a wopping 61.10 hp. The 60 hp barrier has been broken.

I got the charts from the dyno. The mix is good but for the 15 to 1 area. But it goes a little rich at the beginning. Looks like just a little less delay and a little more fuel. Then re test.

I think that is exactly right, more fuel and less delay.

Everyone is pushing me to run fuel pump. But it took a lot of tuning to get rid of fuel. From my past experience. I have more than enough fuel volume to feed this amount of power. I can't wait to rid this thing.

LOL - You'd ONLY need a fuel pump IF the AFR recorded a long initial LEAN condition, as all other conditions should easily be rectified by adjustments.

Having 12.5 to one through the initial part is ideal. It is easy to jet for a steady state . And if bottle pressure drops it goes rich.

Agreed but also unlike a pump, fuel head drops as nitrous pressure drops, so you shouldn't go as rich as with a pump and it's better to have the system go lean towards the end, as it makes more power.

That is actually a potential explanation for it running too lean at the end of the run, depending on the tank shape and volume and the consumption rate, the change in head 'might' be too much and be causing the lean out, so I suggest you do some dyno runs at the start and end fuel levels you experience, to see how much it affects the mixture.

I did a whole lot of volume testing during set up. I forget about the head pressure. And let the level drop. I started to notice a change at about two inches from the top. Then there was less volume but it did not change for a while. I finally decided to check the tank. It was 3/4 full.
I was frustrated because I had to start over. But was glad to know when to refill tank.
Warm up and a full run . And return ride to get in line will drop the level about 10~20 mm.

I think it is OK.

Glad to hear it.

Realitivly speaking this is a fairly efficient system. I could probubly get three full passes on what I have on the bike. I refill the bottles and fuel tank between runs for now because I am testing and want everything as perfect and consistent as possible.

For the 1/4 mile I will not refill each run. And will only use one bottle at a time.

I have two 1.5 pound bottles now and open them both for the mile. I use about 1 lb of nitrous to spray fifteen to twenty seconds for about 1/2 a mile.

It's a shame that we can't accurately predict the improvement in nitrous consumption, that customers would get from switching from ANY US kit to a WON system, as that alone would soon save them the extra cost of the system, as we're pretty sure it's been in the region of AT LEAST 25% better with WON on the customers vehicles who have made the switch.

Always keeping in mind that saving is in addition to the HUGE SAVINGS on engine damage that our customers don't suffer, whereas as users of US kits most certainly do.

so have you guys set a new world record with this thing yet?!?!

The bike has eleven land speed records at Maxton North Carolina . And six records in Ohio. and hold the title of worlds fastest 250 ninja.
Top speed so far is 123mph

what kind of fuel are you using?

The last runs have been with VP fuel
VPR http://www.vpracingfuels.com/page730043

I chose this fuel because I tune with pump gas. This has worked well. I am still researching fuel types.

that fuel is no good. i tried it. hurts power everywhere compared to some of the better fuels. honestly for the amount of nitrous your using vs engine size, i would definatly consider q16.

Thanks . I will try it .

The 2014 season is getting startred in a big way. Big as in BIG PISTONS. I scored a set of 66 mm pistons and the sleeved block. This adds 33 cc making the engine a 282cc engine. In addition to the 12.5 to one compression. The large piston gives a lot of room around the valves,
I also did a major porting on the head. I removed the valve stem tips a rounded the area around the valve seat. This should increase flow.

In addition to all of this work. I am going to dial in the cams better. Someone watching my video said I need to change the cam timing from the stock settings. There is a lot to setting up a motor because I have to make all the tools. But that is done. So now I am going to degree the camshafts and head for the dyno.







I am hoping the engine will be close to 40 hp then add 30 with nitrous.

The next speed trial in May 2-3. That only gives me 90 days to finish this motor. I still have the undamaged 265cc engine from last season as back up.
I need to break in this 282cc engine. That will be on the dyno and test the nitrous.
Then I need to go to the 1/4 mile track. No to test the nitrous. I need to ride the bike more. April 1/4 mile testing will be cold but fun.

Looking good and the best of luck with getting all that work done in time.

I hope there's still plenty of wall thickness and have you by any chance wire ringed the head/block?

The wall thickness is good because it is not an over bore at 66mm it is a new sleave.

I did not O ring the head. But I did go all out with a new head gasket.