NOS on a 4.0L

Gotta ask the question....Why??
 
Yes it's possible. It's actually fairly easy to do. The cost depends on the kit you buy. Check into the ZEX systems. They offer a dry system that is low cost. All you have to do is plum one line into the intake and wire in a momentary switch to engauge the system.

I gotta ast too... Why??
 
89wrangler said:
Gotta ask the question....Why??
Click to expand...
If I had to answer the question, I can only think of two reasons.
1. You WANT to blow the engine, to drop a 350 in it.
2. "YJscott
Underage User" (see the second line) and the part about "drive it like you stole it" in his sig.

As for can you, yes, see the previous post. As for is it a good idea? Can't think of a normal situation it would be a good idea in. Possibly cool, but there are a LOT of more useful things to do first.
 
If you have a really strong running motor and ran a kit that uses a WOT switch, and use the ZEX controller to control the flow of N2O so you don't melt your piston tops it could be fun for hill climbs... Punch it to the floor, hold on and shift...:driver:

On the other hand you better have something better than stock axles if your gonna be running WOT and bouncing up hills.

Id be game to watch, but its probably not the best idea to force an engine to run faster and hotter in an environment that isnt exactly known for having the least dusty air and generally not moving at speed to keep airflow across the radiator.:popcorn:

Leave N20 to the guys who run a straight line for a 1/4 mile at a time.
 
I'll ignore the why elephant...

If you are going to run NAWZ MAN there are 2 parts to the install.

#1 Is the easy mount bottle plum line and actuator.
You could probably handle all this in 2-3 hours.

#2 and much more important is building a motor to run nitrous.
As a minimum you will want stronger/neew main caps bolts/studs and bearings.
Better pistons to prevent a swiss design.
Stringer rods to prevent ventilation holes in the block
Better head studa
better head gaskets
better valves.
Then you can flip the switch confidently.

Can you run it to a stock motor?
Yes!
Have I done it?
Yes!
BTW did you know that at the right velocity a piece of explodd rod can go through the oil of a SBC and actually pierce the front cross-member? Its kinda cool, but it sucks for oil retainage, HP and fuel mileage
 
SkyHiK5 said:
BTW did you know that at the right velocity a piece of explodd rod can go through the oil of a SBC and actually pierce the front cross-member? Its kinda cool, but it sucks for oil retainage, HP and fuel mileage
Click to expand...
Bwahahahahahahahahahahahahahaha
THAT made me laugh.
Kind of like the guys that see how high their turbo pressures can go on a stock engine.
If you are going to do nitrous, make sure you take your time and do it right.

As for why not to,
These pictures always make me weak:
Before:
before.jpg

After:
rearend.jpg

And:
outside.jpg
 
Why not just drop in a small turbo.. We're looking at swapping a small turbo off a 4cyl (eclipse, wrx, whatnot) onto his 2.5L YJ.

The 4.0 is more crowed up front but could probably still be done pretty easily.

Running the boost around 4-6lbs should give you some nice gains and not have to worry about upgrading anything internally... Just wouldn't want it running lean...
 
Ive thought about NAWS'n mine. But the 4.6 stroker really is enough. If anything, I will turbo it, and then, if (when) I want more, I will spray it.
 
jeepinmatt said:
Ive thought about NAWS'n mine. But the 4.6 stroker really is enough. If anything, I will turbo it, and then, if (when) I want more, I will spray it.
Click to expand...

stroked, then sprayed
*shudder*
bad combination...

You better find some BEEF ass rods is all I can say.
 
I've seen NOS run on tons of stock engines without a problem. Everyone thinks NOS just blows up the engine immediately. It doesn't if it's done right. The biggest part of any nitrous system is FUEL. You need tons more fuel to run nitrous. And then only at WOT. Running it at part throttle and idle will blow up the engine. You need an arming switch, and a micro switch on the accelerator that is only pressed at WOT. You will also need a higher flow fuel pump and possibly bigger injectors.
 
rattlecanpaint said:
I've seen NOS run on tons of stock engines without a problem. Everyone thinks NOS just blows up the engine immediately. It doesn't if it's done right. The biggest part of any nitrous system is FUEL. You need tons more fuel to run nitrous. And then only at WOT. Running it at part throttle and idle will blow up the engine. You need an arming switch, and a micro switch on the accelerator that is only pressed at WOT. You will also need a higher flow fuel pump and possibly bigger injectors.
Click to expand...

there is so much wrong here I dont know where to start.
Oh well, follow his advice put a NOS kit on a stock 4.0, I got about 6 stock motors to sell.
 
some one told me it could be done. i wouldnt dump money into the 4.0 if i new it would blow up.

sounds like a V8 swap is the way to go
 
SkyHiK5 said:
there is so much wrong here I dont know where to start.
Oh well, follow his advice put a NOS kit on a stock 4.0, I got about 6 stock motors to sell.
Click to expand...
shut up...no one wants to hear your first hand knowledge,aren't you aware if it can be read somewhere on the net it must be true..:lol:
I put nos on a CRX SI.....in 1988 before the ricer craze, it worked great until I blew it the hell up...after the 4th or 5th shot.
 
SkyHiK5 said:
there is so much wrong here I dont know where to start.
Oh well, follow his advice put a NOS kit on a stock 4.0, I got about 6 stock motors to sell.
Click to expand...
Bwahahaha! How much NOS have you personally run through stock engines? At tech school we ran NOS through a stock z 28 camaro and a stock 5.0 mustang. NUMEROUS times. They do it about once a week. Run it on a dyno jet without NOS and then with it. These weren't new cars either, they had some mileage before NOS was installed. Now granted these cars didn't suffer from That Jeep Thing, but we weren't easy on them to say the least. I've seen NOS run first hand through stock engines and KNOW it can be done, if done right. Also just so you know a hunderd HP shot only gets you about 86 rear wheel HP.
 
Will you guys please call it nitrous? NOS is a brand. Yall are killing me.
 
rattlecanpaint said:
Bwahahaha! How much NOS have you personally run through stock engines? At tech school we ran NOS through a stock z 28 camaro and a stock 5.0 mustang. NUMEROUS times. They do it about once a week. Run it on a dyno jet without NOS and then with it. These weren't new cars either, they had some mileage before NOS was installed. Now granted these cars didn't suffer from That Jeep Thing, but we weren't easy on them to say the least. I've seen NOS run first hand through stock engines and KNOW it can be done, if done right. Also just so you know a hunderd HP shot only gets you about 86 rear wheel HP.
Click to expand...
A 5.0 and an SBC are ENTIRELY different beasts than a 4.0.

MUCH more capable of handling "over stock" amounts of HP.

It's true that an N2O system, done properly, just by being nitrous won't magically blow up your engine.
What WILL blow it up is that engine having a lot more power than the stock internals can hold up under.

Basically, if you have a 300 horse engine that you want to shoot a 200 hp N2O to, then your bottom end needs to be able to handle 500 HP.

So if you think a stock 4.0 short block can handle 300 HP, then go for it. :popcorn:
 
Pacfanweb said:
A 5.0 and an SBC are ENTIRELY different beasts than a 4.0.
MUCH more capable of handling "over stock" amounts of HP.
It's true that an N2O system, done properly, just by being nitrous won't magically blow up your engine.
What WILL blow it up is that engine having a lot more power than the stock internals can hold up under.
Basically, if you have a 300 horse engine that you want to shoot a 200 hp N2O to, then your bottom end needs to be able to handle 500 HP.
So if you think a stock 4.0 short block can handle 300 HP, then go for it. :popcorn:
Click to expand...


DING DING DING
We have a winner.

Nitrous when set up properly with a properly designed engine can live a long and happy life.

One other major concern I would have (aside from snapping the longer, thinner 4.0 crank in half) would be the difference in real world vs. dyno.

A dyno machine has a nice smooth CF. Not exactly the same as a 33" wedged between a rock and a hard place. If the shock loads didnt take out the motor, they certainly wouldnt do nicce things to axles, trannys. dshafts, ujoints etc.
 
Back
Top