Nismo Tune too hot for nitrous

[Rockrover]

Hey guy's...Been researching my arse off, and may be purchasing a 75 shot nitrous set up for my 11' Nismo. Either Zex or (most likely) NX.

I know the 350 guy's are running heavy shots (150) on nothing more than a step colder plugs.

My issue is I don't have access to any credible Uprev tuners in the New Mexico area. There is one in Albuquerque, but I've heard some negatives, and don't really trust the tuner to be competent enough to; a) understand the Nissan mapping, b) Not make the engine more susceptible to detonation and leaning out. Seems if the tuner isn't knowledgeable, the car gets worse, not better.

My concern is with the stock Nismo tune. I read that the timing is hotter, and the AFR is leaner. Two issues you don't want with No2. Question is, how much leaner, and how much more advance? I'd like to believe that a 75hp shot once in a while will be fine without a tune, and I've read that to be true on a standard non-Nismo tune, but what about the Nismo tune?

I plan on using a NX Maximizer 4 controller, which claims to monitor AFR through our wide ban 02, and cut the solenoids if the programmed high/low value is exceeded. That coupled with a low pressure fuel cut-off, and I should be able to keep things...Well...In the box.

So how much hotter is the Nismo timing? Should I be really all that concerned with a 75 shot? If I do this a step down on plugs will be done of course.

TIA,

--D

[G37Sam]

I wouldn't run a Nitrous Kit on a High Compression motor without a very a careful tune. You'd definitely have to enrich your mix and retard a few degrees to compensate for the Nitrous.

[gbrettin]

You would be the first Nismo that I know of running N2O. My advice would be to start small and data log.

[NeverBoneStck]

U need a tune with that 75 shot and colder plugs.

[Rockrover]

Originally Posted by gbrettin

You would be the first Nismo that I know of running N2O. My advice would be to start small and data log.

Gotta' be a first for everything right?

I was thinking the same thing wih the data-logging. Start with the 35 shot, log, adjust if required and move up from there. I just have to find the right tuner to help with an e-tune for No2. Any ideas? Z1?

Still wondering how much more advance is programed on the Nismo versus other tunes. Time to make some calls.

[Dragon_Ball_Z]

Subd


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[NismoRudyJ]

I run 100 wet shot on mine! Going on 2 months now with no issues! The shop I deal with hooked me up! Retards ignition timing a few degrees when the wot switch is activated

[Jordo!]

It's never especially advisable to run nitrous on any motor without further tuning...

At minimum a way to pull timing would be good. Colder plugs wouldn't be a bad idea either.

[Rockrover]

Originally Posted by NismoRudyJ

I run 100 wet shot on mine! Going on 2 months now with no issues! The shop I deal with hooked me up! Retards ignition timing a few degrees when the wot switch is activated

Good to hear!

Can you give specifics relative to your build; Type of system, management unit, tune specifics, plug type, etc.

How about a review on the hit? On at 1st gear? Third? Seat of the pants feel, and traction(?).

Seems there are a few 370 No2 builds, but a only a few on actual day to day performance.

Thanks man.

--D

[btimola]

The tuners in albuquerque suck? I was going to go get mine tuned from el paso

[Rockrover]

Originally Posted by btimola

The tuners in albuquerque suck? I was going to go get mine tuned from el paso

I didn't say they suck...Just that I'm not super confident that they've done enough VQ37VHR motors to warrant 'expert' status. As we all know the tuner is the key to out smarting the Nissan engineers. Tuning isn't rocket surgery, but we've all read on these boards about a bad tune, FI and BOOM. I'm attempting to build a case to run a 75-100 shot of nitrous. Too lean and too much timing and BOOM. Tuner cause and effect? I don't want to find out the hard way.

As you know there are two UpRev tuners in Abq. I'm talking with Motive now. Seem to be the better of the two, but 'better' and 'competent' have yet to be determined in my mind.

[NismoRudyJ]

I'm loving it so far! It's twin Holley Sniper kits! Stock plugs. Waiting on my AFR gauge to arrive and will be getting dyno time sometime after New Years! Already done a few pulls with, not advisable I know. Cant resist! We did some runs over the weekend and at a 20 roll, started spraying in second gear! Broke traction going into third! Tried in 1st and spun allot! She pulls pretty nice though

[gbrettin]

I'm running a 100HP shot on my stock tune and been through 7 tanks, 3 tanks @ 75HP and 4 @ 100HP. I'm picking up UPRev pretty soon and will be data logging in the spring. I wish I had something to show you now....

I wouldn't waist my time with a 35HP - 50HP shot. To be honest, 75HP was a great starting point. I heard Z1 has dyno tuned some Z's with nitrous so maybe you could give them a call to pick their brain.

Originally Posted by Rockrover

Gotta' be a first for everything right?

I was thinking the same thing wih the data-logging. Start with the 35 shot, log, adjust if required and move up from there. I just have to find the right tuner to help with an e-tune for No2. Any ideas? Z1?

Still wondering how much more advance is programed on the Nismo versus other tunes. Time to make some calls.

[NismoRudyJ]

That's real good to know dude! So 7 tanks and not a single issue?

[gbrettin]

Originally Posted by NismoRudyJ

That's real good to know dude! So 7 tanks and not a single issue?

No issues at all, my car runs like new. I should note that I don't run with spray for long at all when I use it.... say 5 - 12 seconds and long durations before the next use.

I forgot to mention that I'm running with a 34 row oil cooler to help with heat.