So being from Salt Lake City, I only see myself as having 2 tuning options for my NA/nitrous g35. I have the tuner version already, I just need help deciding which route to go.

1)local tuner, little to none experience on vq35de's, mostly a domestic platform tuner. just became a certified osiris tuner in the past year or two. but is at my exact elevation of 4500 ft.

2)drive to vegas and have church tune me since that would be closest well known tuner. he has experience with nitrous on these cars and is well known. but, the vegas elevation is less than half of where i am at now.

doing a 150 shot of nitrous on 11:1 built motor, so need a good tune. what should I do? worried the change in elevation will mess with the tune some when i come back home if i get it done in vegas.

thanks

 

You seem smart, and especially since it's NA just self tune... nitrous isn't rocket science.

 

if it was just NA, i would. its simple enough, get a/f where you want them, i think about high 12s or 13 for NA, then advance timing till you get some knock with a good listening device, then retard a tad bit. that part is easy enough, it is the nitrous i am worried about. i know, pull timing, but how much? i tried that on my last motor with a utec and no matter how much timing i pulled, i melted plugs, was with rich a/fs too. so i promised myself i wuold just pay for a professional one this time around.

 

All I have to say is don't f*ck with nitrous

 

^that's dumb, dude. A well controlled nitrous system is easily more reliable than FI.

 

https://my350z.com/forum/nitrous-oxi...-about-it.html

 

Make sure to use a 'wet' kit, 1-step colder plugs, start by pulling quite a bit like 5-6 degrees. Advance slowly with knock device once the A/F's are legit. I know a guy who ran stock timing on a 100 wet shot for years. Tuned by simply swapping jets and his A/F was perfect. Like I said there isn't a whole lot to it...

 

thats just it, i was on a wet 100 with 2 degrees pulled and methanol injection and i was melting plugs still. all nitrous setups are not created equal. i am doing it professionally, just need to decide which one to use. basically it comes down to how big of a factor is the elevation thing, because that is the only down side to driving it to vegas.

 

anyone want to recommend one of my two options?

 

How much tuning has the local guy done with the Osiris software. As others have said, NO2 is pretty easy to get right and if hes manily a domestic guy i'm going to go out on a limb and say that hes got some experience with nitrous.

elevation will play a big difference with your tune, when i drive back to my home in MI from Virginia Beach (only about 1000ft diff) theres a noticable change to the way the car feels.

just my two cents.

 

tuning is tuning. you dont need specific car knowledge. if your local shop does alot of domestics, then they prolly have done alot of nitrous setups.

Your tune is very basic, so I'd get done at your elevation.

 

thanks for the response.

i know he has done one HR and one DE. i think that is all he has done. both just had a few bolt ons and that was it

 

are there little specific things with osiris and the car that are not basic knowledge?

for example, im am guessing the target a/f ratio for an LS1 is different than a vq35.
or how the variable intake timing affects the power curve on a vq as opposed to an LS based motor.

these are the things that bother me that he will not know and i will be missing out on power

 

I think he has done an HR and a DE each with just a couple bolt ons, and that is the extent of his osiris experience.

is your car tuned with osiris? and you still felt the change with the elevation?

i experienced the same thing when i self tuned my car with the utec a couple years back. i thought it was just that i did something wrong. at a lower elevation, my tuned map was sluggish at best. went back to the stock map and the car instantly woke up.

i called osiris and church about this issue and if it would be there with osiris, and both said that the tune would auto correct so it would be fine. I would like to take their word for it, but i have a feeling the car would not adjust as much as i would like. especially worried about it if it doesnt correct appropriately for the nitrous and i end up messing up another engine.

 

there is also another option. here in salt lake there is a very well known tuner for hondas. has multiple civics in the 8s. anyway, he is local and at my elevation, but has never used the osiris software. maybe that is my best option?

 

You'll be fine with the domestic guy near you. Stop overthinking it. Its getting dyno tuned right? Your panicking.

 

yes, dyno tuned. im not panicking, just was an expensive venture for me by not having a good tune on my last motor. a mistake that cost over 10K and i just am being extra careful how i procede so that does not happen again.

 

Whoever does it have it tuned at your altitude.

 

Ok, thanks