Nismo Tune too hot for nitrous

Rockrover · 12-22-2014, 01:23 AM

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 · 12-22-2014, 02:09 AM

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 · 12-22-2014, 08:09 AM

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

Rockrover · 12-22-2014, 02:20 PM

Quote:

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.

gbrettin · 12-24-2014, 11:15 PM

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.

Quote:

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 · 12-25-2014, 08:36 AM

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

Jordo! · 12-25-2014, 01:54 PM

Quote:

Originally Posted by 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.

Ehhh -- OEM tune skews way rich (11:1 AFR) so that helps, but you could be causing microdamage to the pistons and other reciprocating parts you will not find out about for a while... you won't necessarily grenade the motor all at once.

I'd at least look into 1 or 2 step colder plugs (and lots of tuners swear by copper ones, although I think stick with iridium and colder... ask Z1?) and if you are running 91, find 93 or higher when you plan to spray. You might look up a blending chart and add a 1/4 tank of 100 pump gas if you can find it to nudge up the AKI.

Winter temps in Michigan will help too.

Good luck!

NeverBoneStck · 12-22-2014, 08:25 AM

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

Dragon_Ball_Z · 12-23-2014, 05:59 AM

Subd

Sent from my iPhone using Tapatalk

NismoRudyJ · 12-23-2014, 07:49 AM

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

Rockrover · 12-23-2014, 10:30 AM

Quote:

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

NismoRudyJ · 12-24-2014, 12:35 PM

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

Jordo! · 12-23-2014, 09:08 AM

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.

btimola · 12-23-2014, 12:37 PM

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

Rockrover · 12-23-2014, 05:39 PM

Quote:

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.

12-22-2014, 01:23 AM	#1 (permalink)
Rockrover Base Member Join Date: Jul 2014 Location: Santa Fe Posts: 18 Drives: 2011 Nismo Rep Power: 11	Nismo Tune too hot for nitrous 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 __________________ 2011 Nismo: Greedy Ti Exhaust, HFC, CAI, Fortune CO w/Swift, 15mm spacers, Kenwood DDX770, WickedCAS Stage III, illuminated door sills, back-up camera, Tint, sound proofing/deadening

12-22-2014, 02:09 AM	#2 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	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. __________________ '14 Viper GTS '08 RB'd G37S - Sold

12-22-2014, 08:25 AM	#8 (permalink)
NeverBoneStck A True Z Fanatic Join Date: Oct 2009 Location: Beaverton, Or Posts: 1,110 Drives: 2008 G37 S Rep Power: 18	U need a tune with that 75 shot and colder plugs. __________________ Juiced! That is all you need to know !!

12-23-2014, 05:59 AM	#9 (permalink)
Dragon_Ball_Z A True Z Fanatic Join Date: Jul 2014 Location: Mississippi Posts: 1,117 Drives: Nismo& Sport/Touring Rep Power: 17	Subd Sent from my iPhone using Tapatalk __________________ Build in Progress

12-23-2014, 09:08 AM	#13 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	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. __________________ Enjoy it. Destroy it.

12-22-2014, 08:09 AM	#3 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,291 Drives: Tricycle Rep Power: 589151	You would be the first Nismo that I know of running N2O. My advice would be to start small and data log.

12-25-2014, 08:36 AM	#6 (permalink)
NismoRudyJ Base Member Join Date: Oct 2014 Location: Louisiana Age: 34 Posts: 23 Drives: 2013 NISMO 370Z Rep Power: 11	That's real good to know dude! So 7 tanks and not a single issue?

12-23-2014, 07:49 AM	#10 (permalink)
NismoRudyJ Base Member Join Date: Oct 2014 Location: Louisiana Age: 34 Posts: 23 Drives: 2013 NISMO 370Z Rep Power: 11	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

12-24-2014, 12:35 PM	#12 (permalink)
NismoRudyJ Base Member Join Date: Oct 2014 Location: Louisiana Age: 34 Posts: 23 Drives: 2013 NISMO 370Z Rep Power: 11	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

12-23-2014, 12:37 PM	#14 (permalink)
btimola Base Member Join Date: Nov 2014 Location: el paso Posts: 185 Drives: 09 370z touring spor Rep Power: 11	The tuners in albuquerque suck? I was going to go get mine tuned from el paso

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