Ok so I�m ready to order my nitrous kit. And yes I have already used the magical search link that god blessed us with. I know some people are going to be mad and say use the dam search button, and I did but I have some more detailed questions that I didn�t find to be asked.

I decided on the NX MAF wet kit with a 10lb bottle (because of ease of install and quality). Im only planning on using a 50-75 shot until I get comfortable with n20 than maybe up to a 100 or even a 150. I have a 98 a4 T/A with 112k miles. I just had the wires and plugs changed out about 1500k miles ago, and I used a/c Delco iridium�s they were plugged at .60 ( I don�t know why my buddy mechanic plugged them but he did).

I will be installing this myself. I don�t plan on putting it on a wideband dyno until I do a 100+ hp shot. Is this a bad idea or should a wideband dyno still be done on a 50-75 hp shot?

Question 1.
Spark plugs
Are these spark plugs that i currently have ok to use with a 50-75 shot until I use 100+ shot or do I have to change them out, if so I would like to use the tr6 or denso iridium? What do I plug these at so that I can run a 50-75 shot and still be safe for a future 100-150 shot? Also when running n20 and using tr6's how often do the plugs have to be changed out? and when doing a N/A run with plugs gapped for n20 will the car respond as good when there gapped at factory spec's ex. .60?
I looked at the sticky but it only show ls1 w/AFR heads.

Question 2.
Timing
I read that timing doesn�t have to be pulled for a 50-75 shot, its only need for anything over a 100 shot, is this right?
Im looking at by the Timing Tuner, to use only as a window switch (3000-6000rpm) for the 50-75 shot with out pulling any timing. Then when im ready for a 100+ shot I would like to use as a window switch and to retard the timing. And when I do a N/A run advance the timing. Can the timing tuner do this?

Question 3.
N20 arming
How do you a4 guys use the n20? When second gear kicks in and third or only in third? Or do you use another technique, please post others?


Brackets
I have seen some of the sponsors sell solenoid brackets. do any sell a bracket that will accommodate the solenoid that comes with the NX part number 20109 to fit on the throttle body ( I just like the way it looks mounted there), or is there another location that would be better? Im also going to mount the bottle in the spare tire location so I will need a bracket for that install.

I do plan on buying a bottle warmer, purge kit (vented through nostrils), and bottle opener when I go with a 100+ shot.

Sorry for it being so long but I didn�t want to leave out any detail. Mods in sig. and I have 555r's for traction problems that I will be mounting on for the n20 use.

And a special thanks to everyone at ls1tech for your help, this is the site I refer to for help and has always been successful.

 

Here's my .02 (I am not a No2 expert either, most of this comes from threads here and on vette forums)

Question 1.
Spark plugs - Most everyone seems to run the TR6s. That's what I run too. Gapping them.. well, some have opened them up to .050-.060 however MOST of the threads I've read, they're setting them at .035-.040.

Question 2.
Timing - Seems that most of the threads agree that under 100, stock timing is ok (no other major mods) and after 100, retard 2-4 degrees depending on how much juice.

Question 3.
N20 arming - From everything I've read, not too many guys shoot in 1st. Neither do I. I wait for my A4 to hit second gear, then flip the switch. I'm installing a window switch but still I'm not going to arm until 2nd just to be safe. I let it shoot through to 3rd. I'm using 100 dry shot but don't race it hard. Just for fun once in a while.

Brackets - maybe someone with your set up can shoot you some pics.

Bottle warmer - good idea. get the type with some sort of sensor. Some sense the pressure which is great, unless you forget to turn the bottle on.. then they just keep heating it up. Others sense the temp of the bottle.. may be a little less accurate but a little safer.

Also look at a few other safety gadgets.. a fuel pressure safety switch, window switch, a fuel pressure gauge and a air/fuel gauge.

 

for the 50-75 shot will i be ok using the ac dleco that i have gapped at .60 until i get a 100+ shot or do i have to change them out for tr6's with nitrous gap?

thanks

 

go ahead and change them out to NGK TR6s

 

you didn't search enough anyway

tr6, stock gap works fine from my experience (.35) on like a 100 shot. arm the n2o however you want. i have a window switch, a wot switch, and a arming switch. if i do it on the street i manually hit the button when im confident with the traction. at the track i let the window switch turn it on/off.

fuel pump doesn't hurt, you don't really need to pull timing (wet), DEF. hit that **** in 1st gear if you can hook. i like to use a bone stock fuel/timing maps since the systems are designed for that anyway. less work/tuning too like that. a4 don't spray it through the shifts if you like your trans, use a window switch/warmer/purge all of that junk if you want it to work right. a "bare bones" kit could make the car faster but also hurt some parts and you won't get the full potential out of it.

solenoid brackets- you are kind of on your own. maybe call harris speed see if they have something that you can adapt to your noids. they'll prob answer any questions you have too.

 

so the timing tuner (pull timing) isnt really needed its more of a prefernce?
thanks

 

if you get knock retard pull out timing. if you don't leave it alone.

 

sleeperstyle is dead on with his suggestions...DEFINATELY SPRAY IN FIRST GEAR!!!

 

Q1: Plugs, I didnt know AC made iridium plugs....sure you didnt mean platinum, as in stock type? If stock get them out now. I prefer to use the TR6 (or Autolite but forget #) and up to a 100shot you can run .040" (max gap for TR6). Good plugs, easy to read after a run, and cheap enough you can swap them out every other oil change or whatnot.

Q2: Timing, at 100 shot dont worry about it unless you get detonation. Then, either use a blend of race gas, or get some timing pulled. I wouldn't use a timing tuner for a window switch, tap into all the features it offers or simply get your car tuned.

Q3: Arming, on an A4 car its not will the trans go, but when. So be prepared. Before anyone jumps in and pounds chests about the stock trans....I ran over well over 600 quarter mile passes, blowing up to 175 shots regularly (at times 220) and this was less than 12mo span. It did go, most likely from a tuning issue of shift rpm vs mph vs nitrous anyway...the trans will get abused so be ready for it. Some will spray out of the hole, like me, and some will WS the spray and only after 1st...out of the hole, with tuning and suspension will net some very nice results.

Hope this helps. Good luck with it.

 

i live in cali and 91 octane is the highest pump gas available. with out running a tune on n2o does anybody know if a can put in an ocatne booster additive (or are these junk?). or can i add some c-14 jet fuel (i think thats what its called) to the tank. i know a buddy that buys this at a local performance shop and adds it to some of his n2o foxbodys before headding out to race. i would like to know if its ok to add to my car without a tune???
thanks in advance

 

Yes, use Torco if ya can get it and/or if ya need it. Or you can get it online for deal.
Robert