Nitrous Question

[Redline240]

I have a question regarding the fuel system needed to run nitrous...i've read in a few threads that larger injectors are needed, wouldn't this only be the case with large dry shots? The KA runs rich stock so a 75shot of dry would be alright but above that more fuel is needed and that can only be added through the injectors. However a wet or direct port setup adds fuel to match the amount of nitrous through whatever nozzle is used, be it NX's shark nozzle or NOS's fogger nozzle...so wouldn't the stock injectors be fine with either of these systems since the extra need fuel needed is added with the nitrous?

I realize the fuel pump needs to be upgraded, but is a FPR needed?

Redline

[Nathan]

From what I know about nitrous, your right about a few things...the wet system works as you described, although you might want to run seperate fuel lines/pump for it, or upgrade the stock pump etc. The stock injectors should be fine with a direct port wet system, but you shouldn't neglect the timing issue. It will need to be retarded while you are spraying, if its a large enough shot to warrant it (I think a 75 certainly would). Also, I wouldn't go running a dry 75 shot on a totally stock engine, thats just asking for problems. At least run a wet system for that, or switch out to a nitrous tuned ecu with 370cc injectors or something.

[Redline240]

Well i was thinking i would use a MSD 6AL for the timing retard so that i can still maintain good NA hp...i just used the 75 as a reference for the dry shot, i'm planning 200+ shot of direct port with maybe a 75 wet off the launch...the pistons will have to go out for some forged ones and probaly the rod bolts too, but most of the rest of the internals should hold...some S13 cams, p&p, HS header, custom intake, etc...

But back to the fuel, i have a walbro 255 inline and i was thinking i'd add a 255 intank as well....also i'd like to upgrade the lines to -6 and run it to a distribution block with a return. Then from there one line to the fuel rail, one to the direct port selinoid(sp?) and one to the wet....

Also, is it possible to run both wet and direct port off the same bottle? Couldn't i just use a T or Y to seperate the main line? Both wouldn't never be use at the same time...

My concept obviously needs refinement, so please improve on it!

Redline

[WhiteSilviaS13]

I just found out i've been spraying 120 shot dry on my ka!! ive been using a .055 pill and i've gone through 2 whole bottles just to show how strong the ka is. Still not a good ideal to do but to answer your question i think the stock fuel pump is okay for a 75shot dry as long as you get a fpr. Im going to go to 75 shot myself with an fpr. Its a good ideal to change out the fuel pump because its old and you dont want it dying on you when you spray. Does anyone know the sizes of the pill for what horsepower?

[Asleep Altima]

you should look into the digital 6+ if you plan on spraying a lot fo n2o. ive got it and im extremely pleased with it. im running advanced at 23 n/a and i have it set to retard 6.9 degrees while spraying. wet or dry, i personally would limit it to a 75 shot on the stock fuel system. nx has a very nice self contained direct port kit out that comes complete with a secondary fuel rail. the fuel rail has 4 injectors and n2o and fuel lines - all in one. you cant go wrong. the only thing i would add after that would be a bigger fuel pump and maybe an fpr. im very happy with my setup now though. about 15 bottles and (knock on wood) no problems.

[Redline240]

you should look into the digital 6+ if you plan on spraying a lot fo n2o. ive got it and im extremely pleased with it. im running advanced at 23 n/a and i have it set to retard 6.9 degrees while spraying. wet or dry, i personally would limit it to a 75 shot on the stock fuel system. nx has a very nice self contained direct port kit out that comes complete with a secondary fuel rail. the fuel rail has 4 injectors and n2o and fuel lines - all in one. you cant go wrong. the only thing i would add after that would be a bigger fuel pump and maybe an fpr. im very happy with my setup now though. about 15 bottles and (knock on wood) no problems.

Yeah i know about the NX setup but i'll be making a custom intake manifold so i don't mind the drilling involved with the N.O.S fogger setup either...but i'm pretty sure the NX only offers up to 150 shot where as N.O.S offers up to a 200 shot...

As for the Digital 6+, what differs it from the 6AL? Can it be tuned with a laptop?(i've been looking for a excuse to put it in the car, lol) Is it much more expensive?

Redline

[Asleep Altima]

the digital6+ has a launch rev limiter, an rpm rev limiter(of course) and 10 degrees of timing retard in increments of 1's and 10ths of a degree. its also faster so to speak than the 6al with the new processor it uses. its a little bit more expensive at 279 but you dont have to buy any rpm chips or anything like that since now, its all built in. it also can retard the timing at startup depending on your engine timing requirements... all in all, it was pretty much made for a nitrous setup, whereas the 6a and 6al were designed to be universal. as for nx, im not sure what the max jetting is... with the direct port setup it may be a little higher, but id have to look into it, i dont want to lie to you.

[Aries]

the NOS dirrect port supports 500 hp on one kit.the NX dirrect port supports 550hp on one kit.It's a difference in the way the jetting is done.

NOS = rear flare.NX = front flare.

The solenoids are identical and made by a company in SAn Antonio Texas for both companies as well as Nitrous Works and TNT.

[Asleep Altima]

i think also, isnt the nx jetting in metric?