This is the nozzle my kit came with and I couldnt make it work any other way without my hood hitting the line etc... SO I have the nozzle pointed so the nitrous is ejected right towards the intake. I didnt think this would be a problem since the engine will just suck in all the nitrous anyway.

This is all I have to work with and dont have access or funds to set it up any other way,

 

oops, here is the other pic of my nozzle.

 

Moniture the airfuel and see how the mass air meter pics up the mixture and responds.
Dave

 

So it wont pick up that the nitrous is being sprayed this way?

 

It should. But dry kits can be alittle finiky and nozzle placement can play a huge roll in how the mass air meter sees the mixture. This is why we like our Halo design so much. It completely fogs the air intake track to where the mass air meter has no choice but to see the nitrous.
Dave

 

I used dual nozzles on my Blackwing. The MAF needs to read the Nitrous, I used two so that the nitrous streams would collide in front of the opening and then get sucked through the MAF to get a good Mix







Try yours as is, start w/ a 50 shot, if the AFR is good then go to a 100

I had issues with mine at 100 shot, my 26 pound injectors were maxed out (99-00 have small injectors). A set of 42 pound injectors solved that problem.

When I was stock I did not have to change timing until I got above 100 shot. I used a predator to monitor KR.

 

interesting. I really have no way of testing my AFR yet, and now I am thinking that the interface might be a good option for me. You say if AFR at 50 is good, then go to 100, but are my 28.8 injectors really big enough for that? You said yours were maxed out at 100 and are only a little smaller than mine. \

If you dont mind me asking, what is KR?

Also, am I even going to notice a 50 shot lol?

 

Do not spray the car until you know what the A/F ratio is. You dont need a tune to get this, a few WOT dyno pulls w/ A/F will tell you where you stand. On a Pre-maf dry shot you have to mess with the nozzle position to get it correct. that only goes so far before you have to start messing with the tune. With the interface you simply adjust the fuel settings to dial in your A/F. just make a pull on the spray, see where you are at and adjust accordingly. I am not sure if you have installed the kit or not but the interface can be use on pre and post MAF dry shots.

As for your injectors you really won't know until you try it. 50 shot is good, 75 should be as well. 100 shot will be getting close to maxing out the injectors. You could be fine on the 100 shot, but no one can say that for sure right now.

KR = Knock Retard

 

These are when I was Stock 99 LS1
50 shot good AFR, no you would not feel it much on the street. Point of starting small is testing the system to ensure WOT, Window Switch FPSS etc all work under controlled conditions.



Upped the shot and ran out of injectors (logging w/ EFI Live showed them at 106%)...Lean on spray is bad...Matt at HSW hooked me up with new Delphi injectors (Delphi 42's) after I determined it was the injectors that were maxed out.



KR as Mike said is Knock Retard. The LS1 has two knock sensors under the intake. Common practice is to log looking for KR to adjust timing as needed. You can log KR using HPT or EFI Live, or the handhelds have Real time monitoring, where you can have a buddy watching it while your spraying.

With the 42's and H/C (400 RWHP N/A) duty cycle on a 100 Dry is just under 70%

 

Do you know what your duty cycle was with 50 shot on the stock injectors beer?

 

Just get a damn wet kit!!!

Don't have to worry about all this duty cycle/nozzle placement bs.

 

haha but its too late for that, hope beer comes back and answers my question

 

Sorry I do not, it must have been acceptable though, the Dyno shows a nice AFR under 12.0 like it should be. I did not start logging Injector duty cycle until a few months after the dyno, and it was pretty much while trying to get the 100 shot to work. This being said guys have run 125 shots with the smaller injectors, basically by spraying right at the MAF wires.

Nozzle placement is critical (at least it was...) unless you get something like the "Interface" This tricks the MAF to seeing/reading what you your shooting.

Jim

 

Concidering budget is a bid concern I would call Dynotune and get what it takes to convertthe system to a dual nozzle system and do yours like Beer did his.
Dave

 

General rule of thumb is 125 on a bone stock car. Shoot Robert56 on this board a PM. He has a z and has done quite a few dry set ups in his day. I'm sure he can at least get you going in the right direction.

Trying to get nozzle position just right on these cars can be somewhat tedious work. I would recommend getting it on the dyno to verify a/f with nozzle placement and adjust accordingly. Or if you can't get the maf to register everything you can use the Interface to "pick up the slack" on the current nozzle placement or you can simply move the nozzle post maf.

Nick

 

That sounds TOO easy.....

 

haha, well I guess the interface is an ode to the guy that invented the light switch...who knew nitrous could be as easy as that? Maybe we should put the little Staples EASY buttons on the Interface.

Nick