Location for nitrous

[ZFast300Z]

Once the proper temperature is achieved you have an abundance of O2 and the mixture starts to burn more rapidly and raises the cylinder to peak pressure faster. Thats why you retard the ignition timing slightly.

Thats exactly what I said. Nitrous oxide raises your cylinder pressures to there peak sooner then normal combustion in an NA or Turbo car. Therefore to prevent making an attempt at forcing your crank straight through 7 main caps, you retard ignition timing.

In this way, you are allowing the crankshaft to rotate more, and compensate for the quicker burn of a nitrous mixture. If this is still unclear let me know and I can try to explain more.

 

[Alpinesupra]

i dont understand y people are afraid of nitrous. .
yes most guys with turbos use a 75 shot but there are 2jz guys with big turbos making big power using 150, 100, 225 shots and making even better power, passes, etc etc and holding just fine.

now as for me i am currently running a nx single 150 shot wet wot system, BUT i also have smaller 100, and 50 shot pills if i wanna take it down some but im not afraid of the extra pressure or power.

my curret mods.
-built motor
-rebuilt stock head
-hard pipes
everything else is stock and thats no joke and stock timing at 13 psi.

i will be adding a 255 pump and after market fpr to keep a better eye on fuel and what not to be on the safe side.
i dont have any track time yet nor and dyno numbers as of yet on bottle but once i do everyone will know cause im planning on upping the shot to maybe a 250 shot?? we'll see.

thanks
-sean

 

[ATL88Supra]

i dont understand y people are afraid of nitrous. .
yes most guys with turbos use a 75 shot but there are 2jz guys with big turbos making big power using 150, 100, 225 shots and making even better power, passes, etc etc and holding just fine.

now as for me i am currently running a nx single 150 shot wet wot system, BUT i also have smaller 100, and 50 shot pills if i wanna take it down some but im not afraid of the extra pressure or power.

my curret mods.
-built motor
-rebuilt stock head
-hard pipes
everything else is stock and thats no joke and stock timing at 13 psi.

i will be adding a 255 pump and after market fpr to keep a better eye on fuel and what not to be on the safe side.
i dont have any track time yet nor and dyno numbers as of yet on bottle but once i do everyone will know cause im planning on upping the shot to maybe a 250 shot?? we'll see.

thanks
-sean

lol there also not running 20 year old 7mgte's

that being said anyone wanting to run any kind of spray on a stock 7m is going to be asking for it don't be surprised if you have to toe it back home

 

[ZFast300Z]

my curret mods.
-built motor
-rebuilt stock head
-hard pipes
everything else is stock and thats no joke and stock timing at 13 psi.

i will be adding a 255 pump and after market fpr to keep a better eye on fuel and what not to be on the safe side.
i dont have any track time yet nor and dyno numbers as of yet on bottle but once i do everyone will know cause im planning on upping the shot to maybe a 250 shot?? we'll see.

thanks
-sean

This seems to prove the quote "Nitrous doesn't blow engines, Idiots with Nitrous do." Now I'm not calling you an idiot, however your not being the most intelligent with your N20 system.

There are reasons why its you pull timing, and reasons why you dont shoot more then 75/100 shot through a fogger nozzle into an intake. There are also reasons why when you start running upwards of a 150 shot, that you use an independent fuel system. If you choose to ignore all those reasons, then you are giving yourself a reason to open up your pocket book and rebuild that already built engine.

 

[buldozr]

This seems to prove the quote "Nitrous doesn't blow engines, Idiots with Nitrous do." Now I'm not calling you an idiot, however your not being the most intelligent with your N20 system.

There are reasons why its you pull timing, and reasons why you dont shoot more then 75/100 shot through a fogger nozzle into an intake. There are also reasons why when you start running upwards of a 150 shot, that you use an independent fuel system. If you choose to ignore all those reasons, then you are giving yourself a reason to open up your pocket book and rebuild that already built engine.

Let me retype what has already been said but in more detail.... lets say this scenario happend, your at the top of third, suddenly your factory ecu freaks out and says" I want to hit fuel cut... just cause" so now we have a bunch of already very hot pistons that just lost 70% of its fuel supply... just like a cutting torch when you heat metal up to cherry and blow a bunch of cold air on it... the air goes right through the piston creating an awesome hole in it.

scenario number two, 150 shot with our crappy head bolts, lift head, blow gasket.

Scenario three, sudden loss of fuel pressure, please see scenario 1 and 2 and a good chance of a little of both.

Enjoy your nitrous on a budget. :cry:

 

[buldozr]

on a lighter note, try playing with a 50/75 shot, reduce timing a few ticks, swap out to one colder heat range plug and reap the benefits.

 

[ZFast300Z]

Let me retype what has already been said but in more detail.... lets say this scenario happend, your at the top of third, suddenly your factory ecu freaks out and says" I want to hit fuel cut... just cause" so now we have a bunch of already very hot pistons that just lost 70% of its fuel supply... just like a cutting torch when you heat metal up to cherry and blow a bunch of cold air on it... the air goes right through the piston creating an awesome hole in it.

scenario number two, 150 shot with our crappy head bolts, lift head, blow gasket.

Scenario three, sudden loss of fuel pressure, please see scenario 1 and 2 and a good chance of a little of both.

Enjoy your nitrous on a budget. :cry:

You put more effort in it then i was willing to...

 

[buldozr]

You put more effort in it then i was willing to...

I know, im an ass, some people just need it broken down. Another funny thing I like is a 50 shot turns into an 70-80 on our turbo cars... its kinda nice. That whole natural intercooler thing going on for us.

My biggest issue I guess is the fact that if you running too much spray on a ... say a DOHC cobra motor, non supercharged, the plugs will tell you if its detonating, unfortunately for our cars, it blows up. Spray for big beefy V8's are good, ls1's and mustangs love spray, a 200 shot is not uncommon for their white trash ferrari's on an untouched longblock. A 100 shot is not really asking alot from our motors its just that we have a lot more variables for failure and it doesnt take kindly to accidents like the n/a V8's.

 

[suprafanatic]

ok question... if you put the nozzel close to the TB on the intake on a turbo car, wouldnt that cause a boost leak?? or how would you go about doing that?

 

[ZFast300Z]

I don't know much about nitrous on turbo cars.....

BTW before you tell me that the lines SHOULD be the same length, understand that im working in the valley of a V-6 nissan with fuel rails, injectors, valve covers, and an upper plenum to deal with. I did the best i could.

 

[ZFast300Z]

ok question... if you put the nozzel close to the TB on the intake on a turbo car, wouldnt that cause a boost leak?? or how would you go about doing that?

Properly tap the hole, and use teflon tape on the nozzle threads. It will seal.

 

[suprafanatic]

doesnt the boost go into the nozzel hole when theres no nitrous coming out?

 

[Dan_Gyoba]

Nope. The nozzle isn't exactly open anyway, and the N2O tank will be holding a LOT more pressure than your intake will. (If not, it couldn't inject any N2O/fuel into the intake under boost, right?)

Edit: ZFast: Nice intake. Looks like she'll run like a scalded cat.

 

[buldozr]

doesnt the boost go into the nozzel hole when theres no nitrous coming out?

the electric solenoids used 'should' close fully and not let the boost go into the system. An electric fuel pressure gauge would be a smart thing to have and a wideband wont hurt. Some of the newer nitrous systems have a 'hobb' switch that would automatically cut nitrous supply if it finds fuel pressure dropping below a certain point. You would also want a WOT switch so no part throttle sprays. Funny story, a guy from the local car club installed a 175 shot into his 3.0L single cam 3000gt. His girlfriend drove it one night and needless to say, she hit the little red button on the highway and got scarred and lifted the throttle... boom. The amazing thing is he stripped the nitrous system out and took the car up to the dealer and they actually warrantied a new motor. Now that is hilarious. It gets better, the second motor he got he wound up screwing up due to him installing the nozzle backwards(facing towards the airbox instead of towards the TB)... BOOM. I dont remember if Mitsu warrantied that one but I would imagine the same tech was working on it and scratching his head why this guy kept putting holes in pistons. That puts more light into the phrase SPRAY AND PRAY! :naughty:

 

[suprarich]

Properly tap the hole, and use teflon tape on the nozzle threads. It will seal.

Tap, or o-ring the jam nut.

 

[Alpinesupra]

there is no reason you shouldnt pull timing out you are right which i plan on doing, i have only have done 2 pulls with stock timing and what not no more because i dont want to re open my already built motor.
for the inexperianced people built motor or not they should either A)stay away from spray or B) shoot no more than a 75 shot.
the stock motor EVERYTHING, will hold a 50 or 75 shot all day long with about 2 degrees of timing taken out i just decided to have some fun and push the limits because i am not afraid of what may happen, but because i know my car, motor, and spray. I will be backing out timing, adding fuel pump along with a vpc/gcc set up to better tune it and larger injectors soon enough.
there is absolutly no reason what so ever why i cant spray a 150 or more through a single fogger, v8's do it all day long (which our motor isnt far off with turbo and a v8 like stroke) as well as some 4/6 cyclenders, just because you wont do it doesnt mean other people wont if they havent already.

btw the none super charger cobra's wont hold a 200shot of spray nor will a stock ls2/lt1, believe me i have more than plenty of friends with those cars that blew their motors because they got bold a sprayed above a 100/150 shot.


-sean

 

[Alpinesupra]

for examples of big spray,

SEAN JOSEPH has ALOT of spray in his car, 200 direct port and 100 single fogger before throttle body on a built 2jz with a 76mm turbo and high compression.
the guy (cant remember his name) from titan motor sports has something like a 250 shot worth of nitrous on a built motor with a 75mm turbo and made several 8 second passes with it.
there is a guy in houston (cant remember his name either) that had a stock 7m with some bolt ons useing a dual stage 75/150 shot set up with many passes and it was holding just fine.

thank you
-sean

 

[Adrian98]

I've seen 150 shot on a stock 98 N/A supra, it was a single fogger. myself I'm a fan of the direct port systems, they tend to only be about $200 more and when you're spaying that's not that much money

 

[Alpinesupra]

^^ exactly, 2jz na's can hold a 150/200 shot all day long, its been said but i dno personally.

rule of nitrous thumb, retard the timing 2 degrees for a 100 shot and 2 degrees for every additional 50 shot after that.

thanks
-sean

 

[Adrian98]

^^ exactly, 2jz na's can hold a 150/200 shot all day long, its been said but i dno personally.

rule of nitrous thumb, retard the timing 2 degrees for a 100 shot and 2 degrees for every additional 50 shot after that.

thanks
-sean

I've seen it personally. I've even seen the N/A motor at 10psi with just A/R tuning, dunno what the hp was but it took a BPU supra, there was also a guy running something crazy like 19 psi on stock compression, he said he kept turning it up and had it at 19 psi for 6 months before pistons 5 and 6 melted