I put on my bottle heater this weekend. I bought the Nitrous Oxide Systems version. It has a thermostat adapter that straps to the outside of the bottle. Its factory set at 85deg., this causes the preasure to stay between 1000-950psi. My .042 (~80hp) nos jet has never felt so strong! I cant believe I have done with out this for so long.

When I checked the plugs they were a very light tan in the flame path. The ground straps were clean and not the slightest bit discolored. Fuel pressure was stable at ~85psi. I was not able to do full 1st through 3rd gear runs beacuse it started to rain. Glad I had the window switch because it bounced off it a few times in second gear because of the rain!

I'm confident that it will take the .047 (~100hp) nos jet and not run lean or detonate. When the streets dry up this week its going in!

Dam I need to go to the track, or buy a G-Tech.

 

This reminds me of the guy whose nitrous bottle (and his Maxima) exploded in his garage b/c of his faulty heater... if anyone remembers the link to the pictures post it.

Good luck =).

 

Seen it, Way Old news... He didnt hook it up right, it stayed on all the time. And he had 2 discs in his safty relief valve. He screwed it up.

So Weaser, do you know anything about working on cars or not? or do you just believe every thing you see and read?

I guess Bottle Heaters an Maximas have bad carma, LOL.

 

http://www.enhancedhealth.com/nitrousexpress.htm

gotta love those pics!

-- Peter

 

Hey, I just dont need another explosion hazard in my garage... to each his own. I just viewed the pictures and your post reminded me of them. And notice I said "faulty", I know this isn't something that happens every day.

 

And what bounced off it a few times in second gear, caused by the rain?

 

A window switch is used to control when the NOS is turned on and off. It operates of engine RPM's. You can set it to turn on and off at particullar RPM's.

I have mine set to turn on at 3500rpm's and off at 6200rpm's. It prevents the NOS from comming on at too low of an RPM or stayin on when you hit the rev limiter. Thats what happend with the rain, I lost traction and the engine "bounced" through the off RPM on the window switch and into the engine rev limiter. it caught traction when the NOS went off, the RPM's decreased, and the NOS went back on.

Basically if you hit the factory revlimiter while running NOS the fuel pressure will cut and bye bye motor. Only 5spd cars need wory about this. An auto will shift to the next gear.

The low limit on the window switch is usefull when launching a 5spd. Most people launch their Max's at ~1800rpms. They have trouble controlling wheel spin with the normal horse power. If you add NOS right when you launch your spinning your wheels for sure. So the window switch will allow you to launch with out the NOS up until you hit the window, 3500rpms on my set up.

You could also power shift with the NOS using a window switch. But I dont think the Maxima tranney could take it.

Basically a window switch is a saftey device.

 

You had help me out with the Walbro pump and Paxton adj fuel pressure regulator if you remember me, both of which I'll be ordering this week. Took me awhile to figure which pump fits the 3rd gen. Also I need to look into the regulator off fitting, which I'll probably go to a machinist to see if they can fabricate one. Anyway, I have a auto and you say the window switch may not be needed since the auto will shift into the next gear. But I like to manually shift when I'm driving aggressive and sometimes I bump the rev limiter when i'm not paying attention. So this window switch will be a good insurance for those with nitrous regardless of gear train. So finally here's my question, Where can I find any info on this window switch, is this a device that NOS might sell?

 

I can answer the window switch question for you. Yes, NOS does make one, but it's expensive. NOS part# 15879 RPM Switch $187.95. Good news is that MSD also makes one that's cheaper. MSD part# 8956 RPM Window switch $76.95. I have no experience with either one of these, but I'm going to get the MSD one. I believe it's a good idea to have a window switch even on an auto because of two reasons. 1. I don't want the nitrous to be on when the auto is up shifting. 2. For any reason if the tranny gives out...ie Slips. I don't want to bump the rev limiter.

 

Isn't Nitrous Express one go by pressure instead of temp? I would think NX one would be better.

 

Damn nice corolla! Thought about one of those as an autoX machine. It's rare seeing one as nice as yours.

G'luck with it!

 

Yeah the NX comes with a pressure transducer. Its works great ( had one a few years ago). But, its also about 2x the cost of the NOS one. But, the NX one will maintain constant pressure no matter what the bottle fill level is. The NOS one wont. 85F (which is what the NOS heater is set at) doesnt guarantee a certain bottle pressure.

PV = nRT!

 

Yep the NX one is better, but I'm a racer on a budget. MAN, I GOT A KID NOW, WTF WAS I THINKING!!!! LOL JJ

I got my window switch for ~$40 shipped from an LS1 guy. Go to his site and e-mail him about the window switch. He does not list it on his site but he does sell one. It was a real easy install. And it works great. The site is... http://harlan.sketchy.net/

 

I would get a window switch on an auto because I like to shift my auto during races. And like you said, the auto does slip sometimes.

ZuM

 

That .042 jet is only worth about 60-65 hp (proved on the dyno). I've run as much as a .056 (do not try this, unless you're set up for it), and it only dyno's an added 90-95 hp.

NOS is notorious for fudging the numbers.

Don

 

Don, Is that at the wheels or crank?

So what do you need for the .056 jet?

 

It doesn't matter, it was on the dyno;

Example: the car was running 700hp before the .042 jet. After, it was running 765hp.

For the bigger shot, all you need is the TT fuel pump, TT injectors, and the NOS daughterboard added to your JWT ECU program. Injectors are about $750, pump is $300 and the daughterboard if you already have the JWT ECU, is $500. If you don't add another $550. $2k should get you going.

 

NOS rates their jets for crank HP, because they cant account for varing differences in drive line loss. That same set up on a motor dyno would show more HP. Though I do get your point Don, I have heard before that NOS is suposed to underate their jets a little.

90hp at the wheels from a .056, dam the JWT set up must run rich, rich is safe though. Most of the other sites I visit about NOS indicate that a .042 is ~75hp(not 80hp, oops my bad).047 is ~100hp and a .055 is ~125hp, so I'd bet .059 is ~135hp, (all figures are at the crank)

The jet size and horse power relationship really has allot of variables, bottle pressure, ammount of fuel, ignition timing etc. Bottle pressure being the biggest one, theirs a big difference between 1000psi and 800psi.

Thanks Don, now I want to run a 125hp shot. Oh well, I can put off my kids colledge fund for a month or two! LOL. I dont think I'll try higher than a .047 until I get larger fuel injectors.