JEB99TA

iTrader: (32)

This doesn't sound right, but, I don't know much about nitrous usage. GM High Performance magazine has an article that says you only get 20 seconds from a 20 lb bottle. I have been thinking about a 100 wet shot with a window switch, fuel pressure switch, and fuel pump.

With this setup, if I sprayed at 3000 to 5500 rpm's with my A4 (shift point is 5800 rpm), how much would a 20 lb bottle be worth? Maybe this mag article was basing their information on a MUCH different setup? 20 seconds on a 20 lb bottle doesn't sound worth it to me. Then, again, a 20 second insurance policy would sure have come in handy a few times.

Please share your experience with me so I know what to do.

GM Muscle

iTrader: (9)

Somethings not right with that figure, I think they moved their decimal point over or something. I think most guys running 100 shot figure about 1lbs every 10-12 seconds. I get atleast 6-8 good runs out of a 15lbs bottle running a 150rwhp shot. The last couple of pounds are kind of unusable for me because I can't get the bottle back up to pressure I want so I'm really only using about 12lbs or so.

860 Performance

iTrader: (1)

That is definetly not right.

Rule of thumb is you should get 100hp for 10 seconds=1 lb

JEB99TA

iTrader: (32)

Now, these are the numbers I thought would be about right and would make nitrous a very worthwhile investment IMO. After reading that article, I just wanted to totally give up on a nitrous kit. Thanks for the real info. With my 10-bolt, I think my limit would be a 100 shot ... anybody think I could go a little bigger without blowing my rearend up?

GM Muscle

iTrader: (9)

With the good old A4 you should be alright with a 150 shot on those Nittos. I was always scared mine would break but then I started hitting it alittle harder out of teh hole and it did just fine. It's basicly coming out of the hole to hard that's going to kill it sooner or later.

JEB99TA

iTrader: (32)

Well, I often read that a lot of people here go with a 100 shot and then want more. I upgraded my 99 to 28.8# injectors. Maybe the injectors would be pushing 80% duty cycle to it's limit ... or even exceeding it ... with a 150 shot?

Randy WS6

iTrader: (69)

Maybe the person that filling the bottle , I've been filling my wone bottle for 5 years now and if you get the Mother bottle with (out) a siphon tub in it that pushes liquid out and not gas, you will not get a full bottle by (liquid weight) .I've had to turn the mother bottle upside down to get liquid. I've worked in a fab shop for 18 years now and work with oxygen ,co-2 ,argon gases the is compressed gas, not liquid and the full bottle weight a lot more than a empty bottle does so if you fill the bottle with out liquid flowing out of the line ,you will get some liquid but maybe a haft a bottle the reset is compress gases.If you do'nt beleave me go to your welding supplier and they will tell you the same thing.

GM Muscle

iTrader: (9)

A wet kit will not effect your duty cycle at all. You will want a better fuel pump though to feed a 150 shot.


Randy are you saying you prefer syphon tube bottles? I've always hated them because I always end up sending back atleast 5+lbs. Now, I know it's impossible to get every last pound unless you where to chill the mother bottle but, alot of the siphon tubes don't even reach the bottom of the bottle. I've been thinking of switching to a tubless on a stand to get more out of every bottle.

Randy WS6

iTrader: (69)

No i like with out sphon tub, but if it don't have it you need to turn the mother bottle upside down to get all liquid, some bottles saids it on the bottle that it have a sphon tubs in them and some don't

Green Thunder

iTrader: (11)

It all depends on how much of a shot they are talking about..

JEB99TA

iTrader: (32)

Nitrous ... looks like a reality soon. Thanks for all your comments/help. Nitrous is the only way I can afford that kind of power right now. I was disheartened by that write-up. Now, I feel a lot better and will continue to plan on a wet nitrous setup.

If you have any advice, please feel free to post it. I can use any information > do's and don'ts that anyone might offer.

I have a reputable Performance Shop who will install this professionally with a new in-tank fuel pump, window switch, fuel pressure switch ... $1,800.00, including tuning. That may seem a little steep, but, these guys are great and they back their work extensively. Thinking maybe a TNT F2 kit ... start out with a 150 wet.

If I ever can save up for a 12-bolt, I could go higher. What are your thoughts?

GM Muscle

iTrader: (9)

If your comfortable mechanicly I would install it yourself. Not so much to save money but to know the system well and where everything is routed. If you have any issues, (esspecially electrical) you will be able to track the problem down in no time.


Randy I thought that's what you where saying but I wasn't sure. Kinda sucks flipping over a 230lbs bottle though, doesn't it?

TigerFan187

iTrader: (1)

My buddy and I just went through two 50# bottles and the one I got had a syphon tune and the one he got didnt. Lets just say mine was gone first becuase its a pain to fill with the other. We only got a few(2 or 3) lbs more out of the bottle w/o the syphon tube.

JEB99TA

iTrader: (32)

I thought about installing it myself ... should be a pretty easy install. It's just that it's so time consuming, doing the kit, the fuel pump, windows switch and then going to get it tuned ... well, I came to the conclusion that it would be much better to do a turnkey install ... just drop it off one morning and pick it up the same afternoon tuned .... be done with it. I'd love to do it all myself, however, just too much going on with the house, work, wife, and kids.

The TNT F2 is normally around $250.00 and with fule pump, W/S, fuel pressure switch and the tuning, I couldn't do it a whole lot cheaper, I don't think. Maybe I'll end up doing it myself 'cause I certainly don't have money to waste. If I had LS1 Edit or HPTuners, I would for sure.

GM Muscle

iTrader: (9)

Yeah it does take some time to install everything, I took a weekend to do mine. $250 for the install is a great price though.

JEB99TA

iTrader: (32)

That's the cost I figured up ... after totalling up all the parts and the cost of the tune. Of course, this is considering the market price, tax, and shipping. Performance shops can get the parts a lot cheaper than I can, so, they'd be making more than $250.00 on it. It's just that it would save me $250.00 if I bought all the parts ... for the price I would have to pay for them and then go spend $250.00 more to get it tuned.