Playing with nitrous!

[Strick-9]

So far, I'm not at all impressed!



I'm running a two stage system with a primary jet of . 30 and a secondary jet coming on at 30 psi of boost that is a . 82.



By seat of the pants, I can't feel the small jet coming on. I can feel when the big jet comes on, but it's a small change. Feels about like the propane coming on. Nothing serious.



Nothing like the surge of power I was expecting.



Tank pressure was 900 psi.



I have -3 line from the solenoids to the NOS fitting. Is this my limitation?



No report on whether it helped clean up any of the smoke since it's dark outside. I guess I'll know tomorrow on the dyno how good it is.



What are you other guys running for line size from the solenoid to the jets? -3 seemed quite small, but since the jet fitting had -3 threads on it I thought -3 line would be fine for such a short run.



-Chris

 

[KLockliear]

-3 should be fine... that has an ID of . 125". What solenoids are you using? Some of the small ones out there are . 067", which could mean your . 082" jet is only a . 067".

 

[Strick-9]

Thanks Keith!



I'm using the cheap $77 solenoids. Powershot, maybe. They are rated at 175HP. I guess I shouldn't trust the rating.



I wanted to go all out and pull the head and tap it for direct port injection, but I knew I had a lot to learn first. I was right!



I recently saw a post on diesel central that -3 line is only a . 51 orifice.



NOS seems to be one of those things that you just have to dive into and experiment for yourself.



-Chris

 

[Deezul1]

Hey Chris

If you put the head back on it will make a big difference in power.

John

 

[KLockliear]

The dyno will tell you a lot. Bring an assortment of jets. When you go up on jet size and nothing new happens, you're at the limit of something. The small NOS solenoids are in the . 070" range somewhere... you might be over their size. That's why we use the . 125" solenoids.

 

[KatDiesel]

Just from what I have gathered, I believe the NOS "diesel" kit comes with Cheater series solenoid, but noone could tell me the size of it. NOS tech told me to "check the website", and I replied back that I had already checked the website, couldn't find what I wanted which was the whole reason I sent the email! They also didn't answer a single question..... I still ordered a NOS catalog jus tto see what they got. I'll definatly be using the Nitrous Express kit... from Diesel Dynamics.



My understanding is the NX stuff is larger and better flowing over the NOS counterparts. And their solenoids are lifetime warrenties.



Do you have the first stage set up on a wide open throttle switch?

 

[CUMINNTSTRKN]

Originally posted by Strick-9

So far, I'm not at all impressed!



I'm running a two stage system with a primary jet of . 30 and a secondary jet coming on at 30 psi of boost that is a . 82.



By seat of the pants, I can't feel the small jet coming on. I can feel when the big jet comes on, but it's a small change. Feels about like the propane coming on. Nothing serious.



Nothing like the surge of power I was expecting.



Tank pressure was 900 psi.



I have -3 line from the solenoids to the NOS fitting. Is this my limitation?



No report on whether it helped clean up any of the smoke since it's dark outside. I guess I'll know tomorrow on the dyno how good it is.



What are you other guys running for line size from the solenoid to the jets? -3 seemed quite small, but since the jet fitting had -3 threads on it I thought -3 line would be fine for such a short run.



-Chris

chris



unless you have a lot more fuel than i do you are using to much n20. how are your egt's when it's on? in my experience if your egt's start coming down your losing power. take your jets back out, and make sure they are not clogged. just for a test unhook the power from your little jet, and try it with just the big jet. it will only flow what the solienoid is capable of but it will let you know if you are running to much n20.



trust me when you get it working you will like it. when you hit the button and you get 150hp you will be all



jim

 

[csutton7]

Strick 9---you need to get a hold of My6EatsV8's he's been running NOS and Propane for some time in his 12v---the other guy I'd talk to is HVAC---

www.performancediesel.net ---you'd save yourself a lot of grief----chris

 

[Strick-9]

Well, I dyno'd today. 17 measely HP with the nitrous.

Tank pressure was 900 psi.

I ran both the 30 jet and the 82 jet.

EGT's were coming down through 1580's when I glanced at the gauge right after the run.



On the street, the 30 jet isn't noticeable. The 82 jet by itself or with the small jet cleans up a lot of the smoke and definately gives a little kick, but that's about it.



I know something's not right. I stayed at Speedworks after most people left and talked to the owner about my nitrous trouble. He didn't even realize I was using it or he would have helped me figure it out. He told me to spray the gas for a bit and feel the lines. If I have a kink or restriction somewhere the line should freeze or be very cold after the restriction.



I haven't tried that yet.



I know my solenoids may not be the largest available, but I know they will flow more than 17HP worth. The problem has to lie elsewhere.



-Chris

 

[KLockliear]

Did you purge the lines after connecting all the lines to the bottle and solenoids?

 

[Strick-9]

No, I didn't purge anything. I just installed it and started spraying it. Is that a problem? Wouldn't the lines fill with liquid after just a few uses? My understanding on purging was just for racing where they need an immediate shot of liquid for consistency. I'm spraying for several seconds and the first tenth or so doesn't matter to me. Am I wrong on this? Do I need a purge valve? I haven't heard anyone else mention it.



One thing I did find weird was this. On the way home from the event I was spraying it a lot trying just playing around. After the wheel bearing damage, I pulled off the road, killed the engine and turned the bottle off. I was going to sleep in the truck for a bit until the tow truck got there (3 hrs). I didn't want to sleep in the truck with a possible nitrous leak. So, I armed the system with the motor off and had to spray for about 30 seconds just to empty the lines to get the pressure off the tank. I thought it would have dropped the pressure in less than a second. Sounds like a major restriction to me, somewhere.



I'll keep everyone posted if I figure it out.



-Chris

 

[Bad340fish]

What kind of nozzle are you running?? A plain ole fogger nozzle might not be big enough as its only meant to supply one cylinder in most normal fogger applications. You might need to go the the fogger style nozzle that is used in some of the late model EFI cars. They get 150-250hp from one nozzle. Whereas a fogger nozzle is meant to run one nozzle per cylinder as I noted before, which would require a much smaller jet and hole in the nozzle. Just a though



And I doubt the purge thing would have caused your problems. Any air in the lines is gonna be gone FAST with 1000psi in the bottle. I do not run a purge on my car and its never missed a beat on the bottle.