nitrious ? for aries

[240ondrugs]

Just installed my direct port kit in my s14! 1 bad thing , it bogs as soon as I squeeze then a couple seconds later it halls ***! Do you have any clue why it does that? thanks for any help you or anyone else has to offer!:help

[Repo Man]

Is your mixture too rich? If you inject too much fuel, you will be too rich which could make you bog. Do you have an air/fuel gauge? If you're stoich, or close, then obviously it's something else.

[240ondrugs]

for the whole time the button is pressed it sits on rich and doesn't move.

[Repo Man]

for the whole time the button is pressed it sits on rich and doesn't move.

Well, there is your problem. Too much fuel. You need to dial back your fuel. Do you have an adjustible regulator? Or maybe switch to smaller fuel jets? I'm not sure just how your system is set up, but you need to push less fuel, just not too much. I'm sure that's why you're bogging.

[240ondrugs]

yeah I think i'm getting to much fuel. The only thing that would bother me about that is I called jim wolf tecnologies and got the jets they told me to get to make a 75 shot.

[Repo Man]

Well, regardless of what they told you, you have too much fuel. You must cut back on fuel and keep an eye on your air/fuel gauge and get as close to stoich as you can w/o running lean.

[240ondrugs]

I figured it out. My line had air in it and my bottle pressure was to low! Now it works awsome. Thanks for the help guys. :ylsuper

[Aries]

I answered your email about this glad it helped

Let me know when you'd like to run your nitrous 240 against mine.The KA Lives Again!

[GatorS14]

Is it "safe"run the new N.O.S. direct port kit on stock KA24de?(I have I/E)should I upgrade anything?what else should I buy to accomodate the system?I also have denso platnium spark plugs is this ok?

[Justicc86]

if it is an autometer air fuel gauge and installed properly than at wide open throtle it should read rich

just a little fyi:pface

[Nismo_Freak]

Is it "safe"run the new N.O.S. direct port kit on stock KA24de?(I have I/E)should I upgrade anything?what else should I buy to accomodate the system?I also have denso platnium spark plugs is this ok?

I'm not a genius on nitrous use but if you plan to use a decent shot, 75 shot or larger, I'd suggest a fuel pump upgrade. While your at it swap out the stock 240 fuel filter for a 300Z unit, it adds good flow and will be one less thing to worry about. Especially for the price you cant beat it. I'm kinda paranoid about nitrous use, so I'd have more than adequate fuel delivery. It only takes once to blow the motor to peices. If your motor is high milage and you want to use a larger shot, 100+, I'd suggest swappin out the headgasket for a metal unit as they are more durable. Other than that I can see the 240 runnin a 100 shot on stock internals, with proper fuel and timing tuning, fairly well.

If you spray a wet shot you shouldnt have to increase the size of the injectors.

[MaineExport]

Who makes a decent fuel pump for the KA?

I have an NX dry kit on the way... I opted for dry because of price, ease of installation, and the MAFS will take care of the need for more fuel (in theory)... I have heard wet kits can casuse detonation on the KA because the intake manifold doesn't distribute liquid fuel very well...

Anyway... can someone explain the ins and outs of detonation? I was under the impression that it was running dangerously lean... but what damage will that cause in reality?

I'm genuinely curious... I have never played with N2O before.. and I want this learning curve to NOT involve a new engine if I can help it!

[96_S14_SE]

walbro or specifically the walbro 255

[Nismo_Freak]

Detonation is actually the flame front advancing too fast. This is due to the mixture being too lean, compression being too high, low octane, timing, etc. Detonation will lead to pre-ignition, the ignition of a mixture as it enters the cyl., and this will destroy all kinds of stuff. You can notice this as pitting in the cylinder head on the intake side. There is also nitrous backfire which is when the mixture explodes in the header or exhaust port. This makes a lovely sound and screws up all kinds.

Running a little rich will slow the flame front due to a smaller chance of the presence of oxygen per mm of travel. Timing also needs to be retarded by a good bit, once nitrous is engaged. This can be done via a timing box in the nitrous system that pulls timing once the system is engaged.

You can pick up a fuel pressure regulator and up the fuel pressure if you get detonation with the wet shot.

On Aries's car we are running twin 315lph fuel pumps for the nitrous alone. Then he has 700cc(?) (72 lbs) injectors and a fuel pressure regulator being fed by a single 255lph.

[MaineExport]

Thanks Nismo-Freak!

So if I am to run a 75 shot... I am planning to upgrade the fuel pump and smack a pressure regulator on there. What is the standard fuel pressure (1:1).... what should I up it to? What should I look for to retard the timing... where can I find a timing box?

Also... A/F ratio gauge... any recommendations (brand)?

[Nismo_Freak]

Get a Greddy A/F gauge... kinda expensive but you get the most accurate reading most of us can afford. Its a semi-wideband unit. Stock on the S14 is 40psi at idle. I have no idea how much enrichment the nitrous will call for... I would up the pressure 4 psi. The wet shot will add fuel and the extra 4 psi should account for anything that has accumulated on the manifold due to its "anti-fuel" flowing ability. If you notice detonation up the psi another 4 psi. If you find yourself going over 50 psi at idle with the wet kit you will want to switch to larger injectors and go with a dry shot. Above 50psi you run the risk of blowing o-seals in the fuel rail. This causes leaks and other mal temperments. As for timing retard there are several devices out there. You can always just retard timing via the distributer but that will effect off-bottle driving to a great degree. Like I said I'm not highly educated about nitrous use, that'd be something to consult Aries about.

BottleFedAllison is his AIM name.

He'd be more than happy to answer your questions.

[240_Keyy]

what did Aires Dyno the other day at CXI in Houston? I had a friend of mine there who caught the run on video but didn't get the numbers.

[Nismo_Freak]

He hasnt mentioned it to me. I'll be taking my KA up there to get some runs in sometime this month. March 7th we are gonna run the car with its new nitrous setup at RCR in Seguin.

[240_Keyy]

Just talked to one of the 2 guys who were there that day and actually saw the numbers, all I can say is that his MKIII supra, that put down 260hp, beat him by a substantial margin. What is the deal with that car man? Seems like it is runnin funny or something from the sound of the tape...

[Nismo_Freak]

Who knows... the motor is fairly stock. Could be a number of things.