nitrous

[Guest z31_drifter]

I decided to sell the 280Z and modify the 84 ZXT. I would like to spray though. What nitrous is the best though and how much is safe to spray? Is 100 or 150 safe?

[Guest Magnum Rockwilder]

Without knowing the specifics on your car, it's hard to go into detail, but here's the basic:

 

A "wet" shot is a must for a boosted car. This means fuel is injected along with the nitrous.

 

You can use a single wet fogger for up to 100hp safely, but for anything more a direct port system with 6 foggers is recommended. How much nitrous the engine can handle depends on its current condition and what all prep and safeguards are used.

 

I'd start with a single 75hp wet fogger and see if you still want more. Spend more money on prep and safety measures before you spray more.

[Guest z31_drifter]

Is NX better then NOS or is it the oppisite? Would the NX "N-Ter" Cooler be good to get?

 

For the specifics of the Z. It is stock right now but it's going to be heavily modified. The ZXT can handle up to 500 HP on stock internals. I would like to reach 400 or 450 HP. That is my goal. I am trying to get as much information on the parts that I want so I can make a list of what I want. I don't want to go on z31.com and get information because I hate that site, some people over there piss me off. I would rather get help from this site.

[Guest Magnum Rockwilder]

I've personally found no difference in the quality of NX stuff vs NOS stuff. My system consists of a mix of the two. I have a NOS bottle, NX fuel and nitrous solenoids, an NOS purge solenoid, NX progressive controller, and a NOS plate.

 

I've had no quality problems with either brand.

 

I would recommend that you find a good lightly used single wet shot and set it up for 75hp off the bat, then work your way up to 100hp. If it has good compression and no obvious problems, it should be able to handle a 125hp shot, but personally I'd stay under 100 until I did prep work.

 

If you decide to go bigger than that, I would recommend pulling the heads and smoothing out any sharp or rough edges in the combustion chambers, installing new valve stem seals, reseating the valves, and if compression is low I'd go ahead and hone the cylinders and install new rings, and new rod bearings while you're at it. Basically an overhaul.

 

All that isn't absolutely necessary, but it's easier than doing repairs if you damage your engine.

 

I would recommend a progressive controller for anything over a 100 shot, and if you can afford one they're nice to have even with a small shot.

 

You MUST use a window switch on any computer controlled car, and set it up so that the nitrous stops spraying before the rev limiter. If you hit the limiter while spraying you'll burn valves... or worse.

 

You need:

 

a wet single fogger kit

a window switch

a low fuel pressure switch

a bigger fuel pump

a compression test

 

I can help you find some good setups if you like.

[Guest ZFien]

Well being that the z31 is a v6 i would start a small shot on there at first such as a 50 shot and then work off that for a little while. Checking for potential problems. If your engine has been known to fail alot or if it has alot of miles i would think about this before i got a kit. Also dont go with a dryshot if you get a kit. Go with the wetshot. The dryshot has been known to really do some heavy damages to the z31 i have read.

[frank280zx]

The engine is plenty strong. A stock engine in good condition will easily support well over 400 horsepower with proper tuning(ie. don't let it knock!). A set of quality pistons will enable your otherwise stock engine to safely support 500+ horsepower with proper tuning...so not on a stock engine, if you go nitrous dont be to overpositve of what your engine can or cant.

[510six]

I had a friend who ran a 100rwh wet single fogger on a bone stock 84z31 turbo and ran 12.7 @110 with a set of ET streets on the car.I can`t agree more with running the proper saftey systems when running a shot of N20.Nitrous and turbo`s go together like peanut butter and jelly.

[Guest Zcarsmakemyheadhurt]

I would suggest NOS on the kit becuase there kits are the most complete, with activation switch, microswitch, and realays. Not to mention taps for the fogger it self ($480.00 new). Your biggest issue on keeping this thing alive is igntion timing, tunning is everything. Your going to want to know where your ignition timing is at all times and be able to correct your igntion curve for NOS. The way to address this is with a standalone programable EFI system. Alot of people here use Megasquirt, but I personly sell and use Microtech EFI. These systems offer a aux input you can wire to activate a safe igntion curve when you hit the little blue button (or microtswitch) on your NOS system. So you can pull back timing to a safe running speed when your on the spray. If you did something like that I would say you can run a higher amount of NOS and boost. Not to mention the advantage of loosing the AFM and being able to fine tune your car on a larger injector. The other way to keep this thing safe and not have to wire in a whole new EFI system is good old race gas. Put a few galons of C16 and run up the boost to 14 psi on the guns, run a degree colder on the plug also (NGK1095) to keep the tips from burning off. Good luck and enjoy the ride.