Put a zex kit in my 8 a while ago but i just got the bottle filled the other day and started running it around town. Its pretty nice. I kept it down to a 65 shot just to be safe. i got a couple pics of the install i guess i can post here.


http://www.geocities.com/ddrraaggonn/box.jpg
http://www.geocities.com/ddrraaggonn/n7.jpg
http://www.geocities.com/ddrraaggonn/n2.jpg
http://www.geocities.com/ddrraaggonn/juice.jpg

welcome to the elite my friend

Nice...hey any of you fogger types know why people put NOS on a boosted car?

I am assuming it is just to get a large turbo spooled up faster...but if there is another good reason...say I won't put in on mine!!!

Congratulations! you now have no boot space whatsoever!

Nice...hey any of you fogger types know why people put NOS on a boosted car?

I am assuming it is just to get a large turbo spooled up faster...but if there is another good reason...say I won't put in on mine!!!


depends on the application....some use it as an initial boost to help you get into boost quicker.....some use it on the intercooler in the form of a spray bar....colder denser right into the intercooler=more hp....some just like allot more power....and drewman it sounds like your a bit jealous :)

That's pretty cool.
How much difference does it make power wise?
________
Web Shows (http://livesexwebshows.com/)

Its a noticeable power increase but its not like the movies where you flip the switch and your head hits the back of your seat and your vision goes blurry. It does pul you back ino the seat more than usual tho don't get me wrong. And unlike most I'm running a dry shot instead of wet. I have a friend here in town that had a wet shot in his 8 and he had some problems with it (like his intake manifold exploding) And when i spray i am running extremely rich. Like when i first hit it my car even bogs for a split second then takes off. I'm sure part of that is cuz i dont have my purge kit installed yet. But i am quite pleased with my dry kit I'm not having any problems with it yet... I'm running at low temps still got no knocks no idleing problems, everything is peachy.

Hey man good to hear that your nitrous setup is running good. When you gonna take it to the track to get some real numbers.

why would you not tap the rubber accordion tube instead of the hard plastic part of the intake box?

Congrats! I found I had less stress on my previous-previous car using N2O than when I had it booooooooosted. :)

If you run a 65 shot dry...you are going to have huge problems with your A/F unless you do something to add fuel..........The A/F is rich stock...but not enough to support a dry 65shot of NOS :(

If you run a 65 shot dry...you are going to have huge problems with your A/F unless you do something to add fuel..........The A/F is rich stock...but not enough to support a dry 65shot of NOS :(

ok Just so you guys know a dry shot isnt just like just shooting nitrous into your motor. The zex actuater box taps into the fuel pressure regulator so that when you use the nitrous it adds more fuel by pulling more fuel through the regulater instead of mixing it with the nitrous directly. So dry kits add more fuel too just in a dfferent way.

You would have to increase the FP a lot to get the additional flow that you need. Usually dry type systems use addititonal injector pulsewidth to add fuel...that takes some type of ECU modifications or a piggyback ........

I hope you are running an A/F guage and doing some logs.......

Its a noticeable power increase but its not like the movies where you flip the switch and your head hits the back of your seat and your vision goes blurry. It does pul you back ino the seat more than usual tho don't get me wrong. And unlike most I'm running a dry shot instead of wet. I have a friend here in town that had a wet shot in his 8 and he had some problems with it (like his intake manifold exploding) And when i spray i am running extremely rich. Like when i first hit it my car even bogs for a split second then takes off. I'm sure part of that is cuz i dont have my purge kit installed yet. But i am quite pleased with my dry kit I'm not having any problems with it yet... I'm running at low temps still got no knocks no idleing problems, everything is peachy.


Sounds like he got a "puddle" built up inside the intake manifold. Seen it happen quite a bit at the dragstrip....mostly on the V8 cars running dual stage setups, but it can happen just as easily on the street with a basic wet kit.

sweet setup!
Listen to Charles...he's the resident Nos expert.

ok Just so you guys know a dry shot isnt just like just shooting nitrous into your motor. The zex actuater box taps into the fuel pressure regulator so that when you use the nitrous it adds more fuel by pulling more fuel through the regulater instead of mixing it with the nitrous directly. So dry kits add more fuel too just in a dfferent way.

You know the RX8 has a returnless fuel system so there is no fuel pressure regulator, right?

Holy crap. 65 shot dry kit on an 8. You are brave my friend. Welcome to the club.

*Update*

So its been like what over a month.. Hmm.. About a month and a half that I've had Nos in my RX-8. A dry shot non-the-less and everything is still peachy. No CEL lights no problems at all. Still puttin stock evo's in their place and I'm quite happy.

Someone asked why i put it in the hard plastic box. Well i had the special drill bit to make the hole specifically for the nozzle so i used it and i wanted to put it in something hard for better anchoring. I figured the hard plastic with the right hole would be more durable and less likely to stretch or leak.

***paging Mr. Hill***

Thinking about a bigger shot?:aroused:

But you haven't have Nawwwwws for over a month- you've had Zex.

Charles
I am getting the NterCooler kit wired. Can I have the throttle swtich and a regular push button switch? My train of thought is if I want to cool prior to luanching or cooling down afterwards be able to use the push botton. When the heat of the race let the throttle switch do it's thing so I can have both hands on the wheel. Letting me focus on everything else.

Yes I ran it by Cam they were the ones who installed the bottle, spray bar and the NO2 lines.

The wiring for the switches and remote bottle opener are being done locally.

The kit does come with the TPS.

In reference to the time it may take to cool I thought of the same thing. Thats why I was thinking of starting to cool the system prior to launching.

Thanks for the help. It will be done tomorrow I'll let you know how it goes.

So where does one go to get one of these high speed "remote bottle openers" cuz that would make my life grand....

Here you go my install will be finished tomorrow.

http://www.nitrousexpress.com/Pages/Opener.htm

I will update tomorrow night.

I had to go test the setup. I went throught he whole 15lb bottle last night. The car did run better and cooler. I have not installed an after temp market gauge. So all I can say is it moved two clicks to the right. After running and realeasing what ever was left in the system prior to the next run. I was able to put my handon the Manifold it was hot but not to the point i couldn't place my hand there.

The system was wired with:
an arming switch
Bottle opening switch
TPS switch (throttle switch)
and a push but switch to use at my will

this is always interesting and i hope mr. hill reads this hehe. But sometimes like when im showing off to my friends and take them for rides i do it in 3rd and hit the nitrous about 6k rpms and then at 8k it like hits some kind of fuel cut type of thing it feels like. Like it feels and sounds like hitting a governer almost and the CEL will flash a couple times and everything goes back to normal. Usually i wait like a min then go back to using nitrous and it does just fine. Anyone have an input on that?

You are detonating.

The computer pulls lots of timing to stop it.

If you continue, you will be grenading.

S

So in conclusion, a dry shot will cause bad things to happen sooner or later, because the Zex system can't really increase the AFR on an RX-8 to what it needs to be to safely boost?

Correct.... you will need to run a wet kit to add more fuel when the nitrous is in use. I have to clue how his engine is still alive if he is only adding nitrous and no fuel. Especially if its detonating and it is being played off like a "fuel cut".

Use a wet kit. If you for some reason still want a dry kit you would have to use engine management with some kind of switch setup so it adds more fuel when the nitrous is active.

Where's my popcorn. This is going to be interesting.

I have the ZEX Wet kit with a 65 shot of nitrous and a 55 shot of fuel. I have done hours of tuning with Mazdamaniac on and off the dyno to get this right. I also have the Accessport. I have already blown one intake manifold.

I just can't wait to see what happens to you guys.

http://www.mazdamaniac.com/images/misc/dtm.gif

^ ok I can take it.

Well i ran my dry kit for about 3 months.. Finished off about 4 bottles and never had an intake explode. I never actually anything severe happen.... It was fun, but now i have moved on. As a few other people on here have said i was wrong.. And i would not recommend a dry kit to the other rx8 users. But since i had the money to not care if i blew my engine i kept doing it anywayz. Although my engine survived just fine with no problems i still wouldnt do it.

So my overall opinion *Dry Kit NOT Recommended

But it was fun and if you got money to pay for an extra engine if/when it does decide to grenade then its some cheap thrills lol :spank:

~Donald

Well i ran my dry kit for about 3 months.. Finished off about 4 bottles and never had an intake explode. I never actually anything severe happen.... It was fun, but now i have moved on. As a few other people on here have said i was wrong.. And i would not recommend a dry kit to the other rx8 users. But since i had the money to not care if i blew my engine i kept doing it anywayz. Although my engine survived just fine with no problems i still wouldnt do it.

So my overall opinion *Dry Kit NOT Recommended

But it was fun and if you got money to pay for an extra engine if/when it does decide to grenade then its some cheap thrills lol :spank:

~Donald



Well put.

Also the intake exploding. Most likely due to fuel and nitrous "puddleing" up inside the intake and then being ignited.

Ideal nitrous in my mind would be the duel nozzel direct port system that charles has photos up of. Seems to be the best way to do the setup and has the most potential for larger shots (more safely) in the future.

sweet thanks for the help phish and bloodroz

Puddleing is the only thing that scares me, o by the way installed the TB spacer looks great will finish my set up this weekend.

If your using the spacer and runnin a full throttle switch, you should be ok.

Puddleing is the only thing that scares me, o by the way installed the TB spacer looks great will finish my set up this weekend.

The key to preventing a nitrous backfire is two fold: Running a window switch to ensure you're only spraying at max load and the second is not operating the nitrous at low RPM's. Since the intake isn't designed to flow liquid but air there are areas where fuel can puddle and a nitrous backfire can occur.

While I'm not an experienced user of nitrous, based on what I've seen I wouldn't operate nitrous anywhere below 4,000 RPM's. That way you've got plenty of vaccum to pull the fuel and nitrous into the motor.

It's not an idiot proof system and responsibility is still needed to prevent damage to your car.

CRH what will you think of next? Can't wait till I test my setup this weekend.

I may have discovered another way to use the factory PCM to retard the timing during nitrous use so stay tuned for developments on THAT particular front..........;)

THAT would be an excellent tool to help increase the amount of nitrous that could be used. I certainly would love to see a 100 or even a 150 shot of nitrous on the RX8. You wanna talk about catching somebody off guard!

explosion much?


65 shot dry shot? u have one hell of an engine

I ran 65 shot wet and i was scared everytime i flipped the button!

The Zex kit I recommend (and sell at quite a competitive price) has the WOT trigger built-in. That's one of the several reasons I prefer the Zex #82021 over others out there.

I have also activated my own nitrous system at RPMs as low as 2,000 (in 6th gear) but that was because I needed to discover the limits of the engine. I wouldn't suggest anyone else try this and I suggest activating nitrous systems above 3,750 RPMs just to be safe.

Another issue with activating nitrous systems at low RPMs is the way the PCM may interpret the load on the engine and the ignition timing the PCM specifies for the engine. I may have discovered another way to use the factory PCM to retard the timing during nitrous use so stay tuned for developments on THAT particular front..........;)


watever man u r such a tease! F the coils. i want the ingnition retardererererer

MM and I discussed the concept of using the knock sensor input as a way to retard the timing during nitrous use but it would be pretty close to what I have in mind anyway so we will continue pursuing our current thought.

Still pursuing that thought? ;)

Interested with my upcoming install..

Nope.