jmm0122

This guy did.

Donnie_K

GASP! You mean that 1970s engineering that still put out more power than most of the V8's in the 90's? BLASPHEMY!

Ya'll really should start looking up performance specs and compare before you start spewing this kinda stuff...

jronald

The problem is not the nitrous, the problem is the right foot.

Ron

odgreen

YES!

Hoooper

well designed 4.0L and even smaller 6cyls in the 90s made more power than our 4.0L, and most of the remaining WELL DESIGNED v6s in the 90s made more power/volume than ours.

dont start getting butt hurt because the Jeep 4.0L isnt the best I6 ever made, I think we can all accept there are better engines out there

and comparing it to the garbage v8s that had largely remained the same since the 60s?

Donnie_K

Sounds like it's time to put up or shut up then son. Prove it... what's "WELL DESIGNED"? we're talking 4x4's here. Fast and Furious Fart Canned Hyundais don't really fit in that category, do they? Nobody's butt hurt, unless I insulted someone's honda. Think it through young blood, you're the one that decided to comment on the 4.0's lack of power on a jeep forum... and honestly it's a hell of a power plant to start with. Plenty of low end torque and unbeatable reliability. We can go have this debate on some non jeep 4x4 forum if you like. Rather than hijack this guys NOS thread with debating the quality of the foundation he wants to start with.

Hoooper

wait, so if I want to take about good engines, i have to keep it to 4x4s? WTF kind of sense does that make? Trucks and SUVs, especially in the 90s, are known to have little invested in development, just look at how little the cherokee changed from beginning to end. so how the heck would looking only at 4x4s make sense? Well designed pretty much means not a pushrod engine, preferably an engine with constantly variable cam timing on at least the intake cam(s), coil over plug (though the dist in our 4.0L is ok). There are various other items regarding intake and exhaust that could be better though I feel the Jeep 4.0L is fair for an OEM setup.

And FYI, I was defending his choice of using nitrous in the first place and not debating his powerplant, feel free to actually read the thread and report back

ClaytonXJ

I'd rather not debate about what's the greatest 6cyl ever. In my opinion they're slower than **** out of the box, but can be made to go a little better. I just want to make it go a lot better. That being said, it is still a great engine. Nobody should expect a straight 6 to be fast. They are reliable. Not impressed with the torque, they only seem to move between 3500 and 5k. I wouldn't say they are the most reliable engine ever, they have nothing on a 4.9 Ford. But they work fine to move a little Jeep around and I haven't killed mine yet.
And there is nothing wrong with 1960s technology. All this fancy new electronic bs is just more to break. Do you see NASCAR using coil on plug, efi, overhead cams or any other fancy **** to make 900hp from a naturally aspirated 358 cui? Nope. Just a junk 1960s technology, small displacement, carbureted, pushrod small block. With compression, camshaft, cylinder head and carb rules holding it back to boot. But they're not reliable I guess, they will only last 600+ miles wide open at 9500rpm.

Guess I will just let everyone know how long a 4.0 will live on the bottle.

Donnie_K

lol, most of your stock motors in your trucks were slower than dog turds back then. But we'll leave that dead horse lay. How many miles did you say you have on that motor? You happen to regear when you went to those 35's? That's the biggest problem I see as far as your motor, trans, transfer case and driveshafts.

@Hooper - Yes. 4x4 engines... this is going in a 4x4, not an indycar. two completely different animals. FYI, dual overhead cams and coil packs can kick rocks, along with their aluminum blocks. Don't get me wrong, I got all that on my bike, but that wouldn't hold up very well climbing over rocks and logs or bashing through mud. Just an opinion.

Gorillaxj

blah blah blah LOL

The 4.0L is a great start with the 8.8-1 compression ratio, which is great for adding boost/n20, I would keep it at a 50-100 shot wet. you will want a wet shot to compensate for the added air/compression. the factory fuel system will not handle the added shot fast enough and will cause it to lean out while spraying.

You will also need to get a wide band setup to moniter the rich/lean condition to watch for any signs of fituige/failure before it costs you a motor. Your also going to want to get colder spark plugs 2-3 heat ranges depending on the size of the shot, to help with predetonation.

A lot of people will recomend letting off the spray between shifts to limit the flare up between gears. I would also recomend window switches, one that will only spray at rull throttle, and one that will cut spray 500-1000 before redline. (don't want to spray into reline )

Do it right and have a lot of reliable fun at the push of a button, cheap out and the fun time is limited with a costly aftermath. do a lot of reading on n20 and what people have had work and fail on the 4.0L.

Good luck, N20 is amazing!

ericfx1984

nitrous on the trail makes no sense to me... but don't let that stop you

Gorillaxj

here is a thread from this site about a year ago... from what it says run a 50-75. there are kits made for the 4.0L, I would do some researcha nd talk witht htese companys about the experience people have had. what a lot of poeple don't know is that its anot that cheap to setup correctly. but it is cheaper then the alternatives.

https://www.cherokeeforum.com/f2/nit...herokee-60496/

Nitrous is like a gold digging, bit%$y girlfriend that you keep around for the amazing sex.

lol

Hoooper

ignorance must be bliss my good sir

Donnie_K

No need for name callin' son. You go get your little vtech honda with the variable valve timing and coil packs, and fart can muffler and burn up those streets. Us grown folk will be on the trail somewhere in our big slow 4x4's, except the couple that are out there with us with their nitrous kits. Have fun, and watch out for those speeding tickets.

Hoooper

I was not aware that Honda had teamed with Vtech to put cordless phone technology in their cars