Is nitrous any good with turbo?

[mazda2002]

I am having trouble understanding why some people run nitrous on a turbo car if the turbo isn't even working in it's top efficiency range. I guess that it must cool the air coming in the engin kind of like an intercooler but other than that why not just bring up the boost?

[jeffmsp]

i am planning on running a 75 shot of nitrous in my mazdaspeed once I have reached the limit of the T25, should be about 14psi I am guessing, then rather than add a larger turbo and have to get all new maps etc. I will have the 75 shot for the track. (with fully built drivetrain of couse)

[nate0123]

uh der, FF formula... 4 cyl + turbo + NOS = 11 sec car!

[mp5jeff]

some people use it to spool a turbo, some just use it because its a cheap power adder, once my motor is built(sitting in my garage right now) i plan on running 23 or so psi on the t3/t4 and eventually running a 50 shot...

[mazda2002]

You think that you will reach the limit of your t3/t4? If you look at the flow chart of a big turbo like a t3/t4 or a gt30, you see that you have to boost a lot to come close to it's efficiency range.

[MnDriver]

one good thing about nitrous when you have a turbo is have it so the lines run over your intercooler and it will basicly freeze up your intercooler and make the air much much cooler cooler air = more HP if that awnsers your question.

[Natey]

I think Jeff hit it on the head. N2o until about 3k rpms, then the turbo kicks in. The nitrous helps the turbo spool up more quickly.

[mp5jeff]

You think that you will reach the limit of your t3/t4? If you look at the flow chart of a big turbo like a t3/t4 or a gt30, you see that you have to boost a lot to come close to it's efficiency range.
i plan on running 25psi, which is pretty close if not past the efficiency on my turbo. now if i put on a t4 backhousing i could push a little more but then i would sacrifice spool up

[mp5jeff]

one good thing about nitrous when you have a turbo is have it so the lines run over your intercooler and it will basicly freeze up your intercooler and make the air much much cooler cooler air = more HP if that awnsers your question.that is an intercooler sprayer, much different then nitrous injection...you won't gain nearly the same power with an IC sprayer...but yea it does help and you don't really need to tune the car for an IC sprayer like you do regular nitrous injection.

[mazda2002]

Is N2O cold when it is in the line? I would figure that it's only cold when it evaporates?

[MSP2NV]

what some people do is have the nitrous purge on the IC, that way you have the n2o injected into the engine, for the power additive. Then you have the purge on the IC, so there is no wasted motion, cools your IC, and gives you some more power.

[Matthew]

I think Jeff hit it on the head. N2o until about 3k rpms, then the turbo kicks in. The nitrous helps the turbo spool up more quickly.
or get a jet-coated GT28RS (evil) and let your spool-up nightmares dissapate.

[mp5jeff]

yea but how fast can a gt28rs hit 20+psi, obviously when running low boost like 6psi it will take no time at all in a dual ball bearing turbo :D, on my application the nitrous will be used strictly because im going to max out the turbo and want more power then it will be at(i think so at least turbo might be enough for 11s not sure), and also nitrous is a good "hidden" power adder when racing for money or something along those lines....

[FC3s Boy]

we run a small shot to spool some of the bigger turbo's we run t78 and t88

[atticus]

i run 25 shot on my p5 gave me an extra 19hp

[A.V.MSP]

I would love to run nitrous with a turbo, other than a sprayer. Nitrous scares the shit outta me though, seen way to many problems and I would rather invest in something I dont have to keep paying $3.75lb for, shit I go broke with one bottle already

[mp5jeff]

that's because no one on here actually spent the time to tune the car for nitrous, instead they just slap it on and hope for the best...you have to tune nitrous just as you have to tune a turbo car if you expect it to not blow up.

[aftershock63]

that's because no one on here actually spent the time to tune the car for nitrous, instead they just slap it on and hope for the best...you have to tune nitrous just as you have to tune a turbo car if you expect it to not blow up.

EXACTLY even with a wet shot or full fogger system you still need other things to be tuned like ignition timing and even the regular injectors because when spraying you change the volume of oxygen you will burn. You should be able to tune your car to spray though either a set RPM range to spool or even better spray the entire length of the track. It is critical to tune because not only to you change the amount air that is going to burn initially but as you build boost the nitrous is going to cool the air charge as it goes into the chamber alouwing for even more air to be burned. So all new maps are a must to use it to its full potential. Nitrous and boost I think is a great idea and I think that the benifits and flexablility of a nitrous system out ways the benifits of bying a new turbo not only is it cheaper say $600 compared to cost of turbo manifold and new piping and possibly bigger IC but this way you can have it but not use it. Think of it as a boost controler except you don't have to worry about the higher air temps you incer under high boost.

[mazdaspeedpower]

Thats interesting about setting the nitrous to purge on the intercooler, and a good idea at that.

[mazdaspeedpower]

and if I'm not mistaken, isn't the power rating for nitrous on a turbo double? so say a 50shot is actually worth 100? or am I mistaken, I thought that the power created on the turbo over NA was exponential or some shit like that, I dunno, I hate math, and it had something to do with math...lol

[Brian MP5T]

and if I'm not mistaken, isn't the power rating for nitrous on a turbo double? so say a 50shot is actually worth 100? or am I mistaken, I thought that the power created on the turbo over NA was exponential or some shit like that, I dunno, I hate math, and it had something to do with math...lolNo, You are adding a set amount of fuel and air to the system. It will give 50 more at 0 or 50 more at 30 Psi...

[mp5jeff]

no, it's not "double" it does produce higher numbers then it would on a n/a car just because of the FI...

[Replica]

and if I'm not mistaken, isn't the power rating for nitrous on a turbo double? so say a 50shot is actually worth 100? or am I mistaken, I thought that the power created on the turbo over NA was exponential or some shit like that, I dunno, I hate math, and it had something to do with math...lolIt isn't going to guarantee a "double" increase in power, but it is going to cool intake temps making the boost that is already there more effective, on top of adding the power of using nitrous. I was about to order some bigger injectors and a 50 shot on my supercharged civic just for the cooler intake temps!

It wouldn't suprize me if nitrous made more power than it was pilled for on a boosted car.

[mp5jeff]

No, You are adding a set amount of fuel and air to the system. It will give 50 more at 0 or 50 more at 30 Psi...
pretty much anyone with FI and nitrous that hits a dyno would disagree :D

[mazdaspeedpower]

alright, I'm getting it now

[n2o99civicsi]

nitrous loves high compression, high boost loves lower compression. Your SAFEST bet on a turbo car with nitrous is to use it as an intercooler sprayer. Think of it like this, for every 10 degrees you cool the air coming into the motor, you gain 1% more power. SO, since nitrous is about -340degrees comin outta the bottle and hitting your intercooler, you'll get some nice gains. You never wanna spray nitrous below 2500rpms into the motor. So unless you are using a T78 or 88 where n2o can be injected into the turbo itself to help spool that monster, you won't need it.

What rpms do you launch at??? If you are holding the revs at 3K before you run, don't you think you are producing some exhaust?? Don't you think you are SPOOLING your turbo? Please god don't use the spray to spool up to 3K on a smaller turbo, you'll be a statistic very shortly.

Tuning a motor for nitrous is much more of a pain in the ass than most people think. In order to properly tune a motor for n2o, the bottle must be at the exact same pressure for EVERY dyno run. That is a pain in the arse fellas.

The biggest concern with nitrous is having a cold enough plug, good enough spark and plenty of fuel. If you lean out the motor when you spray, then the chances of doin that again with that motor will be slim. I've seen wet kits being used and the fuel nozzle clog on the kit when the guy sprayed. It's ugly.

Do it smart and you'll be safe.

[n2o99civicsi]

FC3s Boy- isn't it awesome to see cars come to life when that big of a turbo spools up!! My buddy has one on his Civic. Its crazy!