Ordered a 2 stage conversion and a spare bottle yesterday.

Having trouble with the 150 shot out of the hole so going to try a 75 or so first stage then when it shifts to 2nd hit it with another 75 or so and see what happens.

Have to keep experimenting, also installed a set of AGX's on the rear to try at the track on Sunday.

 

Got 11's ????

 

Gee, gotta get it installed first, hopefully for the race on the 20th Jul, got one on the 13th but will still be on the single for it.
It was shipped on Tues so should get it early next week.

 

Are you going to get that cool F&F steering wheel with the two buttons built in?

 

Are you going to get that cool F&F steering wheel with the two buttons built in?

Sounds like fun. What are your 60' times with the 150 shot VS smaller ones?

 

Haven't seen the F&F setup but will have to check it out. Just got one button now but will have to work on that one. Maybe one on each side.

I got a 1.77 with the 150 shot and a 1.801 with the 100 shot, with the 35 I think my best is 1.84.

Have only run the 100 shot twice and the 150 once so still got some experimenting to do.

 

I'm confused. If you got your best 60' times with the 150 shot, why would you need less?

 

My only thought is so he can get down the track a little farther thus crossing the line in the top of 3rd instead of hitting OD. Don't know if it makes any sense but I guess I'm trying too say the 75 shot won't run out 1st gear quite as fast on the 75 shot compared to the 150.

 

I got my best 60' but its losing traction after that, it comes out of the hole pretty good but then it starts spinning and the trans shifts into 2nd then the wheels catch up to the car and the RPM is too low in 2nd for spray so I either need more traction or less juice at take off.

I am not concerned about going into O/D though, as a matter of fact the further into O/D I get the happier I will be because I will be going that much faster.

 

Can you Please list the different jettings for the NX system for the 35, 50, and 75 shot settings? I unfortunately left my Information at Maximum Tuning, So I haven't a clue as to whats what...thanks guys, i appreciate it!

 

HP N2O Fuel
150 62 35
125 57 33
100 52 28
75 41 24
50 35 20
35 31 18

 

dammit jim, ur at it again. How much was the conversion?
Im getting the slicks next week and the dual stage conversion next month

 

NX sponsors me so price is pretty reasonable, thats why I ordered the spare bottle too.

The dual stage should save my slicks somewhat, they really take a lot of punishment with the 150 shot.

Retail is around $450 for the dual stage conv and $250 for a bottle.

 

im sure it does
I couldnt even use my 125 shot until i got pretty high in 2nd gear.

I think when I go stage 2, im going to need either a booster pump or a 190 walbro pump

 

A dual stage is nice but it's a bish to control manually.

 

My plan is to turn on the first stage when the light turn green just like I do now, then when it shifts to 2nd hit the other button.

Yesterday I had mega wheelspin out of the hole its just too much even with the slicks at 12 psi. Once I am into 2nd its no problem.

 

Im sure it's easier to do in an auto. I had to flip my second switch after going into second gear and it was a PITA. You could probably get a time delay switch to make it easier.

 

You are right there, I wouldn't try it in a manual unless I had some sort of sequential switch that you could control with your left hand.

I am just going to put another switch on the right side and use my thumb same as my first stage on the left side.

 

How does the plumbing work on a 2 Stage NX? Is it just like running 2 separate systems in the same car; i.e. 2 sets of fuel and nitrous solenoids on separate nozzles both tapped into the intake?
-hype

 

Yes two sets of solenoids and nozzels. And with two sets you can actually setup a three stage (1,2, 1 + 2).

 

You got it Hype, its basically a parallel of the standard install, only difference is the conversion doesn't include the bottle.

I will post a pic once I get it installed, this time I will mount the solenoids where you can see them.

PS You sent me another email and I lost it, I wasn't ignoring you. Send it again.

 

Np, no hard feelings here I'm very interested in this dual stage setup, and I may even convert to a wet kit in the future. I'm about to tune my dry kit to a 70 shot with my SAFC 2, but if I had the knowledge I know now back when I bought my kit I would have gone NX My only concern overall is flowing fuel in the intake manifold (backfires aside).

Anyway, I'd like to get some SAFC 2 comments if you're up to it
http://forums.maxima.org/forumdisplay.php?forumid=53
-hype

 

I think you had stated that with N20 you get more power out of the hole->mid track, but after that the power starts to drop off vs. a TC/SC which will gain more as it goes down the track.

Is the reason the N20 loses power, because your bottle pressure drops so you get less nitrous? If so, wouldn't it be of benefit to use BOTH bottles, so the pressure is more constant as you use it? What about a bigger bottle?

I've seen a Y-setup with two bottles into one line in the trunk before and I've always wondered why someone would need 20lbs. of N20, so there has to be another reason.

 

The reason the torque drops off is because as the engine rpm increases less nitrous enters the cylinders. Running a higher PSI can help compensate somewhat because you're flowing more nitrous, but you won't get an increasing torque curve like with a supercharger.
-hype

 

Not sure why anyone would need 20 lbs. I race approx every second weekend and do anywhere between 6-12 runs per race. My typical nitrous fill the following week is between 3-4 lbs so usage is minimal for me.

The power doesn't drop off. It just does not increase like it does with a turbo or S/C, because the higher the RPM the greater the air flow for them. With nitrous the same HP is added throughout the RPM range (because the same amount of nitrous and fuel is added through the RPM range) so the only variable is what the engine puts out itself.

So, the HP is at its maximum when you hit the button, you do not see any increase as the RPM increases.

 

Ok...so with a two/three stage wet kit, can't you just add more nitrous/fuel to peak at the same hp/tq as a TC/SC?

 

No, you have to live with the characteristics of nitrous, its just the way it is.

If you keep adding HP you will blow the engine.

The reason I am going to 2 stage is to eliminate traction problems, I won't run over a 125-150 shot total.

There are advantages and disadvantages of both nitrous and Turbo & S/C's and you have to know and live within those boundries and take advantage of where you have the best power.

 

Jime: I read that you want to have the first stage with a 75 shot and the second stage with another 75 show due to tractions problems. Do you have traction problems when spraying just 100 shot? If not why not just spray 100 out of the hole and then add a 50 shot on top?

 

Ok...Jime maybe I'm missing the physics behind how N20 works compared to a SC/TC.

Why can't a N20 setup add just as much PEAK hp as a TC/SC?

 

Because N2O gives the same amount of power all the time. You spray 75 shot you get 75 shot at most. However with TC/SC the power increases as the car accelerates.

 

Yes, with a single stage setup, but not with a multi-stage setup.

Ex.
Stage 1 = 75 shot
Stage 2 = 100 shot
Stage 3(1+2) = 175 shot

Versus a TC/SC that puts out 175hp peak.

 

I think stage 2 adds to stage 1. So stage 2 produces the shot from stage one and stage 2 together.

 

Nope...two different sets of solenoids and jets IIRC, but even so, you are still ramping up the hp. So why shouldn't you be able to keep going until you hit 370whp like Nigel or 430whp like Mardi?

 

Namely because you're gaining your peak torque very low ~3600 and the torque drops off from there. With the SC you gain torque as the rpms increase hence the very large hp increase.
http://www.vanillaice.com/webmasters...dyno/NOS50.jpg

If the dyno slips moderator would ever approve my posts I could show my numbers NA, 50 shot, and 70 shot (all w/ VI). I feel like my numbers are low, but if you compare my nitrous graphs to others my torque curve is much flatter. The VI really does help peak hp.

For comparison:
250.61 hp - 309.34 tq - 1996 GXE Auto 85 shot
http://forums.maxima.org/showthread....hreadid=187029

295.30 hp --- 384.90 torque 100 Shot
http://forums.maxima.org/showthread....hreadid=130988
-hype

 

 

Ok...now I see why drag racers use N20 to get them going and VERY very large turbos to keep them going up top.

Thanks!

 

Settle down you guys, you are all right.

The nitrous could be used either adding together as Sonic sugggested (that was what I was planning on doing) or you could use them separately, your choice.

You could also do as Ice suggested 1 then 2 then 1 & 2 together so you actually have 3 stages.

Regardless you are still limited in the amount you can hit the engine with before you blow it. The biggest problem with trying to hit over the 150 is that you would have to do it at the high RPM level and you would have to do the sequence every time you shifted. Something to think about. Also Turbo's and S/C seem to be easier on the internals with high HP vs nitrous but then I don't know anyone who has played with trying to sequentially increase the shot during each RPM range. Great idea I will have to play with that one. I will look like a piano player by the end of the 1/4.

 

Have you looked into either of these?

http://www.nitrousexpress.com/produc...=31101&loc=101

http://www.nitrousexpress.com/maximizer.html


I don't think they are RPM dependant, however some like you can probably figure a way around that.

 

Or F.R.E.D.
http://www.c5-corvette.com/catalog/cat7.htm

 

I like the layout of the second maximizer.