Right now I just had to walk away from the car. I don't know what else to do with the vehicle, no smoke was coming out. Now I am thinking about what to do, it's looking like just pulling the motor out and having it built.

Really?! This motor had to have a fault already in it, because it would be very hard to believe you did this while just using a 100 shot unless the car was very very lean.









DAN

That is an assumption we are wondering. Hard to believe that this happened.

Feel for you man. Hope it is something minor and not a major deal. Keep us posted.

I'm getting ready to deploy and well since we have to pull the motor out anyway I just may have it built.

I very sad to hear this bro. I can only imagine how upset you are!

sent from my TWIN TURBO SAMSUNG -SGH -1717

Ya pretty pissed now I'm just gonna beef the motor up.

Yeah those spark plugs looked bad. The parts that blew off probably bent and damaged the valves and a valve seals along with the pistons. Motor rebuild time or just head work you never know.

Sucks man, sorry to hear. Any idea who you're going to have rebuild the motor? I'd have to throw in a suggestion for Motion Lab, especially considering you've already delt with thrm.

I'm gonna talk to them on Monday, not sure if they are ready for this but we will see.

damn dude. cant see how a 100 shot screwed it up that bad unless parts of the plugs got launched into the motor. sorry man :(

Please let us know what happened when you figure it out OP.. A lot of us were going for you!

Some motors just don't like nitrous and I wonder if the way the cams work in our car has something to do with it or do we just have motors out there with flaws I am having my motor rebuild after I lost compression in 2 pistons doing a baseline run with my stillen kit and my a/f was dead on

That's terrible, it looks as if you did everything right, just seems to be bad luck. Well look at it this way you going to have a hell of a nice motor when its built.

I'm really interested in what the outcome is for the OP. I was really thinking that I was going to go the nitrous route. it could be something with our motors... I know a couple of guys that have run nitrous on their 350z and g35 for years with no problems.

I'm out of town for the moment but I will be doing a motor swap or a rebuild.

Just looking at those plugs I would of never tried to start it looks like you have three plugs missing metal which 90% sure it's in the motor. So by starting your going to scare the piston walls which will let oil in past the piston ring. I would be trying to get a small long magnet to put in there to see if there are metal fragments left. Looks like your gonna have to pull the head. ON THE BRIGHT SIDE you could try the new exhaust cam sense your gonna be in the motor anyway. Best of luck

Just an update. We are doing a compression test tomorrow and hopefully all is well. If that passes then it should be something on the fuel side which could mean the fuel injectors. The car starts up just fine, no smoke, no weird noises except for a faint tap which could be a fuel injector or a bent valve. We won't know until we do the test. My question is does anybody know of anyone on the forum who has stock fuel injectors up for sale? I called Nissan and they want 150 a pop.

I have stock injectors from G35 HR Sedan that I could sell you. That is if they fit.

What year? Does anybody know if they will fit?

i have stock injectors, shoot me a PM.

I will have some for sale in about a month when I get my car back from s and r performance

sent from my SAMSUNG- SINGLE TURBO SGH-1717

Although I'm not very familiar with your engine I do have some experience with n2o injected engines. Did you dyno/tune with the colder plugs first?

Yes we did. As of right now we are still baffled one what is wrong with the engine. I can get my buddy to post what he was told about my motor from a guy that he talked to about this motor being done.

Wow....
 

Hey bro, I haven't check'ed this thread since I last posted. I'm sorry to hear. What was the issue? Did you ever find out? I read that you data logged. Was the map you were using a tuned map or a map with timing pulled? What was done with the maps?

I have not yet upgraded my stock plugs but am switching to the GTR plugs once they come in. I read that you went with the NGK ones.

Your previous data logs before this happen what was your AFR?

My quarter mile data logs that I did with the a 100 shot and stock map reads that I'm running super rich at 10.xx. Randy from Uprev suggests that I less the fuel jet maybe a little and re-datalog it.

I prefer running on the rich side than running lean and a situation like this happens. I prefer that he tunes it through the AFR than for me to mess with the jet setting.

I did run into the Zex box not spraying. I'm too far so and I ended up just purchasing another one. It works like a champ now everytime.

I wonder what happened in your scenario. You took all the precautions like I did and I got all the safety devices as well.

I've been running almost two years now on the bottle but only during the weekly drags and during spirited drives for datalog purposes for tuning and have not had any issues. Only issue was a faulty box not firing.

Please bring us up to speed as to what is going on. Again, I'm sorry to hear.

JC

I am over in Afghanistan again at the moment and haven't been here in a while but I will update what I can. So it is looking like the guy that tuned my car pulled too much timing out. I had a map for on and off the bottle which obviously it ate my plugs alive. The thing is I was over cautious I should have never gotten a tune for the nitrous b/c our motors can handle it. The zex box ya as soon as they replaced it I was good to go. I guess those are just hit or miss. My buddy is actually going to be pulling the motor out here in a couple of weeks and finally get down to the bottom of this and see what is going on. As I get the information I will be posting. I am looking at some upgrades though while we have it apart. I am looking to up the shot to about150 so fingers crossed :tup:

Bumping this thread back up.

Are you guys running wet or dry kits? I'm not new to nitrous at all but have always used wet kits. A friend of mine is giving a good deal on a brand new zex dry kit and I was thinking about hooking it up. What do ya'll think?

Never run a dry kit on your Z, they are running wet shots.








DAN

Yes do not use a dry kit no matter the deal. Reason my thread is stagnant is bc I'm overseas. My buddy is working on my car and I am bumping it to 150.

can i ask why you say that?

imo dry kits are just as reliable if not more reliable than wet kits when tuned properly(well with intake foggers at least, direct port is the best way to go imo), the intake manifold is not designed to flow fuel so you could be running lean in a few cylinders while running rich in others(IE cylinder 1&2 could be running rich, 3&4 could be perfect, and 5&6 are lean because they are the furthest away from the TB)

not trying to be a pain or start a flame war here, just being the devils advocate

Sorry for getting back so late, I am still in Afghanistan. Okay so Yes Direct Port is the best way to go but those are usually used for bigger applications around 250 plus which obviously I am not doing. I should have stated running a wet kit is preferred b/c as you know dry kit you only spray nitrous, wet kit you spray nitrous with fuel. I am no where saying I am a nitrous guru and I get your playing devils advocate. What is the biggest shot you have done with dry? In my experience I generally don't hear a lot of people going big with dry kits. It is to my understanding that when you run a dry shot you are betting on the fuel system to compensate on it's own? That means your putting all your trust in the vehicle figuring out what to do once nitrous is added vs the fuel already going in with the nitrous at the same time.Your application is going to dictate which kit to use. I believe that wet kits are safer, and they are also highly recommended and if you ever want to go FI you can keep your wet kit and apply it to your setup. In the end no matter which way you go TUNING will always be the deciding factor.

So just an update, I bought a motor from Z1 b/c well it was easier then going through to see what was messed up in the old motor. I bought a new bottle bracket with a built in heater that will come with a kit to dictate how long the heater stays on depending on the bottle pressure. I will still be going with 150 just gotta find the right guys to tune it once everything is set up. Bought a few other misc. things like a bunch of red silicone hoses, back up light, stealth blinker lights, twm short throw shifter and I am sure I am forgetting a few things. Should have the vehicle running in about 3 weeks. Then back to tuning. Those of you still running nitrous I'm jealous! Has anyone gone beyond 100? Numbers on a dyno?

I think my uncle use to run 150 shots dry on his Z31 N/A(id have to ask him again to be sure) and i did run 100 shots dry on my eclipse before having to remove the kit and sell it(ref ticket) but with the n2o tune i had, it would retard timing and make the car run extremely rich(had 600cc injectors) so when i was spraying, the AFRs were just right

I havent really looked into N2O since then but to do anything with dry kits, you have a **** ton of tuning to do but once its set, it should be just as reliable as direct port(theoretically at least) because each cylinder is either getting enough or more fuel than it really needs, the only reason i say that is because if you went with a wet kit(not dp), there might be a chance where the intake manifold isnt flowing enough fuel into one or 2 cylinders, so those will run lean while the others will run either run just right or rich

dont get me wrong, after i supercharge my Z im going to put a wet kit on but i'm not going to run alot(maybe 50 shots) just because it will require less tuning but dry kits can be reliable if its done right and tuning is spot on


anyhow ill stop derailing your thread XD
good luck with your build, im really interested to see how it turns out

I ran nos on my mustang anything below 50shot it fine dry
75 - 150 wet kit just make sure your getting a good spray pattern with the kit
I was getting lean conditions on the rear pistons and rich conditions on the front pistons because the spray pattern was not that good
Direct port is the best way to go as to not get lean or to rich
I never sprayed below 3k and stopped spraying 500 rpms before redline in case of a miss shift
And because 150shot is like 200-225 additional torque i used a kit to bring the nos on 25% then ramp up to 100%

Just got to stay on top of the spark plugs and your good

Seriously thinking about pulling the trigger on a kit. I know nothing about nos. Reading this thread has been helpful, but i feel like i am still missing a few things. Would someone like to PM me about it. Thanks

I think it would be beneficial for anyone who is looking to do N2O to have the info available in one thread(don't know if this would be the right one, mods please advise)

Since its your first N2O install I'd recommend running 30 wet shots, getting one step colder plugs, and retune(not a huge deal if you don't because when you spray a wet shot, you add fuel with the N2O and you won't be running a lot of N2O)

If you want more info on this I suggest you go to LS1Tech's nos forum, they have a lot of info there.

What are we talking about? A honda civic? LOL Buying the jets for a 30 shot, getting a tune and paying for colder plugs would be such a waste of money, you would be better off just buying race gas. He will be okay with 75 wet shot no tune, and even on stock plugs.

LOL retune on a 30 wet shot? Are you serious? For 1 you won't even feel a 30 shot and two you can run a 75 shot all day on stock mapping no tune and just be fine.

Do I have any experience you may ask. Well I'm one of the longest tenured member here who's been running nitrous since the car came out. I've had tons of passes at the track and ran through more than 50 bottle refills with no issues except a bad emu. Other than that I've had no problems.


And for the record it's Nitrous not "NOS". NOS is a company brand, just like Zex, NX, Venom Etc. Please don't confuse the two. Everytime I hear someone call it that it reminds me of FnF:ugh2:

I have never ran anything less than 100shots before so i am not too familiar with anything lower and im not running n2o on my Z

I only recommended a retune and colder plugs because thats what i had to do running 150shots on my eclipse, plus I dont want to be that guy who says you can run XXshots and be fine with no experience with n2o on the 370z

the way i look at it is, its better to have everything and not need it, than it is to need it and not have it

and i usually call it n2o seeing as thats easier to type out than nitrous oxide but if you are to say nos to anyone, they will know what you are talking about, its like kleenex is a brand for facial tissues, yet everyone calls facial tissues kleenex(same with band aid)

So if i have full bolt ons and a custom tune, should i get retuned to be safe? Colder plugs? Even with only a 75 shot? Im sitting at 322 whp on a mustang dyno

100 + shot is where things become a little more serious but even at 100, colder plugs aren't really needed. Its recommended on most applications to have the timing retarded 4 degrees per 100 so that would be a concern as your car is tuned and unaware how far your tuner advanced timin to make better power NA but even still questionable. 75 shot with an a/f guage and cut off switch you should be fine. Just be sure you get all the things that make it safer to run and keep your bottle pressure consistent when spraying. Running out of spray in the middle of a pull can wreak havoc if you don't have the a/f cut off switch.