Nitrous tuning

[nurmikko22]

Hi guys. So I picked up a plate kit and larry's nano system and plan on running a 100 shot this year, but had a few questions on tuning. I live near the Grand Rapids area and wanted to know who you use to do your tuning and what afr your running. From what I've read, it seems like 11.5-11.8 afr is fairly safe. I do know that the nano system will bump nitrous flow, so I was planning to increase the fuel jet by 20% and stick with the recommended 100hp nitrous jet. I also picked up a timing tuner, so I can pull 4 degrees while spraying. If any of you have used the nano system, what jetting combo did u end up using and how much timing where u pulling?

[Nocooler]

Chace - start out by pull 6*-8* of timing. Use BR7ef plugs - gap them around .030 -.032.

AFR - it's a crap shoot. You'll have to find out what the engine likes. Reading the plugs is a better way to tune a N20 engine, that way you know what's going on in the chamber.

Keep it lean and undertimed and it'll stay together. Rich is not safe for nitrous engines.

[Fox Slaughter]

Chace - start out by pull 6*-8* of timing. Use BR7ef plugs - gap them around .030 -.032.

AFR - it's a crap shoot. You'll have to find out what the engine likes. Reading the plugs is a better way to tune a N20 engine, that way you know what's going on in the chamber.

Keep it lean and undertimed and it'll stay together. Rich is not safe for nitrous engines.

I was just reading an article and it say 11.5 for nitrous. I thought that was on the really rich and 12.5 would be a better choice.
This true?

Obviously read the plugs, but then when you get the plugs right you can get the AFR reading.

[nurmikko22]

Thanks for the input. I'll pull a little more timing and see what the plugs look like... After I get everything hooked up. I've got some work to do.

[Nocooler]

Start out safe - I've still got timing, and jetting to play with on my car.

[c0ncEpT]

I was just reading an article and it say 11.5 for nitrous. I thought that was on the really rich and 12.5 would be a better choice.
This true?

Obviously read the plugs, but then when you get the plugs right you can get the AFR reading.

11.8-12.2 is a good place to shoot for as long as your wideband is accurate. 12.5 is to lean IMO. But I agree you need to pull the plugs and read them. The plugs will tell you what the motor wants.

[DETROITMUSCLE]

good advice so far, I would add that in order to PROPERLY read a set of plugs they should be new or very very light use on them. New is always best and easiest to see and read. Also the only way to get a proper reading is to shut the car off after making a pass, don't let it idle that will give a false reading because obviously the trims ect are much different at idle than WOT. Here is a decent writeup that will get you familiar with what to look for on a set of plugs.

http://www.angelfire.com/fl4/pontiac...Readplugs.html

[nurmikko22]

Thanks, that is a good right up plugs

[Nocooler]

Jeff - I know everyone does it different but I've always seen the plug cut apart and the fueling read on the porcelain, not on the base ring.

[DETROITMUSCLE]

Jeff - I know everyone does it different but I've always seen the plug cut apart and the fueling read on the porcelain, not on the base ring.

I have heard you can use some sort of scope but I would always cut them, just introducing the method with that link, gotta start somewhere.