what's more stressful? 100 NX shot or 50+NA HP and 50 shot?
 

From what I've been reading, it sounds like one of the problems with going with a big shot is the sudden jump the engine has to go through.

So is it actually safer to get a bunch of NA parts to give you about 50rwhp, then do a 50 shot instead of a flat out 100 shot?

if you use something like a maximizer (no I don't work for nx, grin) you are able to gradually add the nitrous and so not overpower the tranny which is something you can't do on a na car. Also you never spray longer than 20 secs at a time so the power is only there when you need it at the track hence less stress on the engine...

...I like nitrous :)

me too:D

What are the potentional damages of running NOS and will any type of shot have the potentional of blowing the motor? What's the highest shot you can get away with w/o damaging the motor or does NOS have a slow or rapid wear away on the engine?

anything that increases the power on on your engine will also increase wear and tear on parts. You can blow the engine or other parts if you don't use safety devices and the right combinations of jets for example.
On a 4 to 6 cylinder up to 50 shot is safe 75 you need to start watching out (use 103 octane gas and such).
There are several safety devices such as a window switch (only spray in a predefined rpm range) and a wot/tps switch (only spray at wide open throttle).
I suggest doing lots of reading and being anal about following instructions and safety tips from the manufactures.

Usually you can spray up to half the engine output. So for the Z you can spray up to 143.5 shot. So if you are playing it safe, spray 125 shots or less would probably be safe.

Maximizer !!
 

Don't want to change the main topic , but since someone mentioned the NX Maximizer is there anyone out there that has it working on the 350z? It has quite a few capabilities including an interface with o2 sensors to shut off if a lean condition developes (that's what I'm interested in).

Your original statement about " a bunch of N/A parts to give you 50 rwhp" is damn expensive! For those of you that for one reason or other go internal and plan on continuing to spray, replace your exhaust valves with some good aftermarket ones made to handle the added heat!

Re: Maximizer !!
 

I know it's expensive, and that's what I've done to my car so far. I set it up as a track car with all the proper parts for it (except tires and suspension - coming in a month). That and I enjoy having a seriously mean sounding Z with power I can use in my everyday driving.

I know you can probably run nitrous on a track road coarse, but I'm not totally comfortable spraying every 8 sec on the straights in a short amount of time. I mainly want nitrous for drag racing and whenever else the mood might hit me.

People have been saying that a 150 shot is about the safe limit for the VQ. I'm just wondering if that translates into meaning for my setup if a 100 shot would be my safe limit then since I already have 50-60 rwhp from my NA parts.

if 150 is the limit and you already added 60 hp then you need to deduct the 60 from the nitrous shot....bottomline max = max.

I Disagree !!
 

I'm not saying it's safe to spray a 150 shot (even though I do that and more) but a 150 shot on a built motor should be safer than on a non built N/A motor regardless how much additional rwhp you already added. The short of it is it doesn't make sense to me to end up with the same results ie. subtracting rwhp gains from the size of shot you spray. Please keep in mind that besides all the bolt ons and cams (I have Tomei 268's vs your JWT cams) I've also gone with forged pistons,rods, & stronger exhaust valves to help handle a larger shot.

I totally agree that stronger forged internals would be great for bigger nitrous shots.

I didn't have the cash for those parts though, just basic bolt ons

It makes sense that the engine can only take so much stress by whatever combination of power adders it's given...

im running a 125 whp shot and still runing strong.I know people that are running a 150 whp shot and they are still running strong.Tuning is the key.

Re: what's more stressful? 100 NX shot or 50+NA HP and 50 shot?
 

In regards to the original post. 100 shot would be harder on the motor than a 50 shot with 50 HP worth of mods on the car already. Nitrous enables the Z to not only produce more HP, but substantially more torque as well. The power gain that you would get with 50 HP worth of bolt ons and a 50 shot would not be as high or as stressful as a 100 shot as far as torque is concerned.

Most bolts ons increase HP and TQ together but is more biased toward the HP. With nitrous you will often see dynos showing torque peaks that are often the same or greater than HP. That is why spraying low in the powerband causes a lot of problems. Not only do you run a higher chance of puddling, but you put a tremendous amount of stress on rods and bolts at low rpm’s with a big shot.

If longevity is a concern, then go with the 50 HP worth of mods and the 50 shot. I don’t doubt at all that you will be fine with a 100 shot on top of those mods, but you just have to do things right.

i was planning on not goin over 350hp or 350ft/lbs at the wheels with the bottle. whether that b a 50 shot or a 75, i don't really care. 350 either way is my limit. i think bein conservative instead of sayin "what's the biggest shot" is the way to go, imo. trust me, your car will appreciate it.