Hey everyone! This is my first post. I was wondering if anyone runs a direct port system on their Z. I've read that if you have pistons and rods, that a direct port setup is a better way to go because each piston gets EXACTLY the same amount of fuel and nitrous. I have yet to see anyone anywhere run a direct port system on their Z. Why?

 

because the stock manifold doesn't give you the ability to really do direct port nitrous

if you buy the kinetix SSV manifold or SSR's manifold, then you can do direct nitrous

the other reason for people not really going nuts with nitrous on this car is the lack of good EMS units that have mapping provisions for nitrous and pulling timing.

The Emanage Ultimate can use multiple maps, so that might be useful in having one map for normal driving, and another map for huge nitrous


direct port nitrous starts at around a 150 shot so doing it means BIG nitrous, not a small extra shot of it.

 

not true, you could go as low as 72 crank-rated hp, after that your jets are getting so small they may get clogged.

 

which kit does 72 crank hp with a direct port for a 6 cylinder engine?

I started a thread not long ago asking if anyone knows of any 50whp direct port nitrous shot kits and everyone said they don't make direct port kits that small. That they're much much bigger like around 150 shot. NX only seems to have 150 whp shot kits as being the minimum

 

direct port in my opinion ( which never mounts to more then a bag of dog poo) is cool, but not practical for this car. A wet shot is well designed and can suit ur need/s easily.

 

I have to disagree...although it may be more work to set up and initially dial in a wet direct port is often safer if not more effective in EFI applications. Lets face it, the biggest argument against wet systems being used in dry manifolds is the (very real) potential for fuel puddling within the intake manifold. This possibility is eliminated with fogger systems as the mixture is better directed into the combustion chambers. That being said the only (production) intake that I think that this would be practical with would be the SSV.

One of the things that we tried when working with more complex intake geometry (read Viper intakes) was a dry system that used propane in conjunction with nitrous . Set up the same way as a (conventional) single nozzle wet system, propane eliminated the possibility for fuel puddling and has a higher octane than gasoline (even racing fuel). The down side was that it was (overall) a real pain in the butt for regular use. And no, I don't recommend anyone run out and try this.

Just my 2 cents...

 

absolutely agree. Direct port is always better in so many ways if done correctly.

 

well, no one makes a direct port "kit" you have to build your own man, it can be done, i did it on my celica, if you have any more questions feel free to pm me.

 

what are these then?

http://www.prostreetonline.com/store..._piranha_kits/

http://www.prostreetonline.com/buy/n...port/80006-15/

http://www.machv.com/nxdirefinits.html

 

I think he meant specifically for the Z.

As far as how small of a shot you could go down to, you might want to look into the Maximizer which allows you to adjust the shot to exactly what you want it to be. I can set mine up to spray 0 - 100 % at whatever RPMs I choose to span it from. The Maximizer has a great deal of features for both performance and safety and with the upcoming realeases of firmware, will have much more to offer. I spoke to FJO in Canada (the makers of the Maxizer) and they stated the the next release of firmware will include not only ramping based on time or RPM, but adjustable patterns based on throttle position. The benifit from this is obvious for other than dragstrip applications.

 

I meant you have to build your own custom setup using one of those kits, sorry if i wasnt clear, and its really not hard to do, what we did on my celica was T-off the fuel line and run an in-line regulator between the T and the solenoid, we would regulate the pressure to 7.5 psi, at this pressure, your fuel jet will need to be the same size as your nitrous jet to get proper fuel, this kept potential for error down and allowed us to toy with a proper shot, if you put necesary time and energy into building a direct port kit, it is 100 times safer than any single fogger and has vastly more potential.

 

yeah but isn't it like that with pretty much all nitrous kits? they're mostly universal right?

 

With all this said, A EFI wet kit is some much easier. PPL are running 150 w/ stock internals. I wouldnt do it, but they are. Its all preference; like running a maximizer or not.



Side Note:
I forget on which forum I read, but there was a thread about "LOW" possiblity of "pooling" on our stock manifolds due to the curvature. (HUGE DISCLOSURE::: I have not measured nor seen the manifold, this is strickly hear-say or "read-say").

 

pooling was a concern with the both the manifold and the intake, but a lot of things have to go wrong for that to happen.

1. you have to have a very high nitrous shot ie. 125shot+
2. you were not at WOT when the system is activated
3. you forgot to purge before a run while nitrous had been in the feed line for a while. air built up in the line and the fuel was not properly vaporized upon leaving the fogger when the system was activated.... ill keep it short.
4. no pruge system is present

to name a few...

if thats the case, im sure it will all end with a big BOOM!! aka backfire. best case scenario, you'll have to replace you air filter because it would of been shredded. worst case....=$$$

 

Thanks everyone for all the information. I plan on buying the SSR Manifold and doing a custom NX direct port system. Thanks again!

 

Very true. My "best case scenerio" resulted in me leaving my air filter and the Injen CIA bracket that it attatched to, somewhere on the I410 Loop.

My backfire was a result of stupidity because I became complacent. I was so used to everything always working no matter how I went about it, that I began to take less and less precautions, i.e. purging and checking bottle pressure. I used to only purge when I first opened the system, but I have changed my ways as a result of the backfire. I now purge just about every time and especially if a little time has elapse between sprays.

As a result of the backfire, I now have a short ram style setup and found out by accident that I actually prefer it this way.

 

Why the SSR and not the SSV?

 

i too learned the hard way. i "forgot" to purge and had a backfire with a 125 shot. fire came out of both my exhuast AND my intake filter. lol. the filter swelled up like a marshmellow from the pressure. luckily i left one of the main ring clamps off of the intake so when the pressure built up, that connection just popped off and minimized damage. i think having it happen while i was on the freeway helped. could of been much worse at lower engine speeds.

there have been people that had to get new hoods because of their intakes blowing up and shredding the hood.

 

how long do u purge in order to clean the line out?

 

I have the digital pressure guage by DynoTune so I purge it down to below 50.

I have it installed in the Cubby box. So I can see that im in my desired pressure before spraying.