4v's on nitrous

[QDRHRSE]

I've been wanting to get another Fox body stang for a while because I sold mine when I found out that my wife was pregnant. I miss having a light 400+ rwhp car. I really miss being able to go mid 12's on radials. I don't have the money to properly build another 5.0 so I'm considering modding my 96 Cobra a little bit. Don't mind my signature, I had fitment issues with the Vortech and it came off as fast as it went on.

My Cobra is stock with the exception of a t56, 4.10's, and an EXCAL2. I have a lot of upgrades but the motor is stock. It is my understanding that these 4valve mod motors really like power adders. I have a Zex wet kit for it. Does anybody have any experience with a set up that is similar? What kind of performance can I expect? Is it worth the trouble? If I can't beat my Lightning which goes mid 12's (on the motor, it has a Zex kit also) then it's a waste. Will I have that capability with a 100-125 shot?

 

[blackfang]

NX kit is better for it. Makes more power.

 

[QDRHRSE]

The kit type doesn't matter. I'm just wondering how the cars react to nitrous. I've had a couple of NX kits. They are nice and can make up to 250hp with the shark nozzle but I only want 100-125. For me the Zex kit is a lot more convenient, plus I have a couple of them in the garage already. But that reminds me, there is not a lot of room under the hood of a cobra. If anybody out there has a unit, where did you mount it?

 

[blackfang]

Actually the kit type does matter. That is just saying procharger is the same as a paxton and a vortech or KB.

NX kits tend to make more hp@the wheels and they do offer up to a 100 shot kit. Plus they dont need any tuning or anything up to 100 shot on a 4.6, just the right spark plugs(NGK TR6 gapped@ .035) and you are set.

 

[SamMan]

My buddy has a 2001 cobra. He saw basically the same % increase as I did with his nitrous kit. His HP is higher of course. We still are pretty even though I guess its due to his weight and lack of DR's and running 4.10's. We are both running mid 12's.

 

[QDRHRSE]

Actually the kit type does matter. That is just saying procharger is the same as a paxton and a vortech or KB.

You are only right up to a point...no you're actually flat wrong. It's not the same type of comparison because nitrous units are all really just about the same up to the nozzle. The solenoids are a little different but all units basically run on the same bottle pressure etc. The NX shark nozzle is excellent with higher amounts of nitrous- I don't disagree. However at the 100hp level the jetting is what makes the difference and once you're jetted for a true 100hp with any of the popular units the results are going to be the same. It's all about getting the fuel and nitrous mixture correct and having a nice safe A/F ratio. Believe it or not, you can re jet any unit the way you want and you can make as much hp you want up until your solenoids can't flow anymore fuel or nitrous. I have used both kits with the last year and I have found the Zex kit more convenient. I couldn't tell the difference in results. I like the fact that the Zex kit can be installed twice as fast and is TPS activated. The NX kits are top quality but 99% of people who buy one are over buying. I've used enough nitrous in my day to know that. Anyway, I don't want to argue about which unit is best. I have never sprayed a mod motored car, especially a 4v cobra, and I want to know if it is true that the mod motors are more efficient on the spray. I would also like to know how much actual power somebody with a similar combo has made.

 

[blackfang]

I guess the fact that Zex also has its own ecu type box to make sure it has the right amount of N2O, yet some others don't. Guess they are all the same huh? I will tell everyone that a wet kit and a dry kit are the same then. After all you did say I was flat out wrong. As for TPS activated, NX has the same thing, as does NOS. It is called a WOT switch. In addition to that, a window switch you can actually set what rpm the N2O comes on and off for the NX kit(much safer in case you miss a shift and overrev). Remember a 4V is not built internally like a pushrod(you claimed to have never sprayed a mod motor) and they dont like nitrous below 3000 rpms unless you like losing your intake. Trust me there are differences among nitrous kits. We wont get into Direct ports which are a whole new ballgame of the "all nitrous kits are the same"

As for power I have seen some spray a 100 shot with Zex and make less than a NX kit. There is a guy on SVTP that made 355rwhp with a Zex kit.

 

[QDRHRSE]

Once again, I'm aware that you can buy a window switch or a tps activated switch.....that's why I like Zex kits. The Zex box isn't really an ECU, it just houses the solenoids and activation switch, it doesn't do anything special. Like I said- convenient. Wet vs dry is a whole other can of worms and wasn't really what we were talking about in the first place. I was told that a dry kit was a definite no-no for the Cobra. I like dry kits actually but something about the newer fuel systems doesn't quite work right dry. As for direct injection type units- those are the best but are pricey and usually are for big hp numbers. I ran an NOS fogger system back in the day on my 68 Mustang and that sucker hit hard....too much for most engines. Since my cobra is a stick I probably don't need to worry about using the nitrous under 3000 rpm. I lied though. I have a Zex unit on my Lightning and that only has a 2600 rpm stall....the 5.4 would be a mod motor too- right? Once again, hp is a matter of jets. Nitrous units basically are the same up to the nozzle.

 

[QDRHRSE]

My buddy has a 2001 cobra. He saw basically the same % increase as I did with his nitrous kit. His HP is higher of course. We still are pretty even though I guess its due to his weight and lack of DR's and running 4.10's. We are both running mid 12's.

Thanks. That's what I was looking for.....mid 12's on radials would be nice. Does your friend have a tuner of some sort?

 

[kanye west]

i have a gt and high to mid 12's is the mark you will probabaly be in. As for Blackfang what the hell is he talking about that wasn't even the question. Is he like retarded. Or just likes to arguee?

 

[blackfang]

i have a gt and high to mid 12's is the mark you will probabaly be in. As for Blackfang what the hell is he talking about that wasn't even the question. Is he like retarded. Or just likes to arguee?

I merely stated that there is a better Nitrous product out there. I am going the Nitrous route after a heads and cam builupand have done some research. Plus friends running it and helping them install there kits. I am running what gives you the most hp, and has been known to work.

There are tons of people using NX and it is very cheap to get, easy to install and you dont need anything else to trick the computer into providing the right fuel. The thread starter believe they are all the same, they are not. Nitrous types, whether it be wet, dry, or direct port all are different and each brand is not created equal. I am sure you can elaborate since you are compelled to insinuate I am retarded.

A good 100 shot on a bolt on cobra should net high 11's with the right tire. As for mid to high 12's..If I had a bolt on cobra and sprayed a 100 shot and got a high 12, I would kill myself. The car can do that with just gears, exhaust and a DR.

Now you can elaborate.

 

[QDRHRSE]

I merely stated that there is a better Nitrous product out there. I am going the Nitrous route after a heads and cam builupand have done some research. Plus friends running it and helping them install there kits.

The difference between you and me is that I've already done it. You can talk until you are blue in the face. I don't need to do the research. I've already been there done that. You know an awful lot for a guy who hasn't tried any of the kits for yourself and has "helped" friends out. I have done quite a few build ups and maybe that's why everything is the same to me. You are really funny. If nitrous kits are so different why are there only 2 styles of jets and 2 or 3 different solenoid designs but dozens of companies that produce kits? The execution and the delivery is almost identical with every kit. If I were to take the labels off of the solenoids you wouldn't be able to tell who made them.

 

[blackfang]

I am done with it. Your posting in the other thread and everyone elses reply shows it as well. Have fun and I hope that motor lasts since you wont be heating the bottle, nor running any safety measures.

Yeah you have done it, but not on a mod motor. Things are a little different as the motors internals, and tuning is different. I hope you dont get upset when you are making less power than those running NX kits with the same mods.

 

[QDRHRSE]

I am done with it. Your posting in the other thread and everyone elses reply shows it as well. Have fun and I hope that motor lasts since you wont be heating the bottle, nor running any safety measures.

Who says that I don't have a bottle heater and or a purge valve? My truck is doing fine with 15lbs of boost and nitrous. If I don't have any saftey stuff, why do I run a wideband? Once again you keep talking about power....you can always slap bigger jets into any unit. You're missing the point completely. I did take a bashing in the other post though.....I'll agree to that. It's too bad people are afraid to tune their own vehicles. I bought tunes from a pro and my truck went a lot faster with us data logging and tuning at the track. It will catch on as soon as people here stop being afraid of their cars.

 

[blackfang]

Nice try. My point is our 4V's can't handle more than a 100 shot without upgrading components. Keep thinking you can just rejet for more power and see what happens.

You are saying that the Gen X upgrade is a waste. What do you think is in that kit? A bottle heater and purge. and blowdown tube which is NHRA required

Keep bashing how thats not needed, but you will never pass Tech at a track without it.

I am not afraid of my cars. I modify my tunes in both of them

 

[QDRHRSE]

100 hp is such a small shot that a warmer and purge are totally unecessary. I have leftovers from my old NX kit off of an old 5.0. With a wet kit, air in the lines will be accompanied by fuel so it won't hurt anything.....it would make you bog and belch fuel out the exhaust. A blow down tube is $30 bucks vs $300 for a genX kit. You are fixated with the fact that an NX kit makes more power but @ 100hp whats the difference.....you can jet any unit to make exactly that [give or take a couple of HP]. Only at 150+ hp is an NX unit going to show a real difference.....we were talking about a measly 100hp right? Hypothetically, if we put the same car on a dyno, we could eventually get them both to make almost exactly the same amount of power with both units by jetting them.

 

[blackfang]

You're right 100% dude.