Pics of Nozzle placement would be good

 

Yes, I do. You see, the 12.4 blip, which will be a little richer on race day, is in fact only on a 170 shot. The rest of the 235 shot comes on at 4400rpm, then being rich is a big concern, and in fact is a little to rich. But again, this area will in fact be a little leaner on race day. All the parameters have been checked and everything was/is fine. remember, that was the first time running this size hit and a little fine tuning is left to be done. however, at no time was it unsafe. guys run that timing and a/f with 150/175 shots all the time. really, if everything is inline, 24* of timing is not really much, imo. wait till you see my 285rwhp shot (3rd stage going together as we speak).
Robert

 

Nozzle placement hasn't changed from my last set-up, however, changed from NOS nozzles to CF SS nozzles and a slight modification. Oh and two styles of nozzles are being used 3 of one style, and 1 of another.
Here's the quad location with old brass nozzles. The two closet to the engine (talking about new set-up) are the first stage, and one is a CF 90* fan and the other is a modified 90* to be basically a straight shooter. The 90* nozzle is my main a/f controler, it's about 3-inches from MAF and is very sensitive to direction of spray concerning targeted a/f.
The closet pair is the 2nd stage and they are basically straight shooters, watch the apex of these two nozzles, as they meet together in center of box and create a kind of null area and then mix well and turn in with incoming air, works great.
Third stage single wet nozzle can not be seen in this pic.

Robert

 

So you have 3 straight shooters mixing in the "middle" of the airbox and 1 90* fan shooting down the intake. It is interesting that the MAF is so picky when it comes to giving the correct A/F in regards to nozzle direction.

I am trying to figure out how I want to configure my dry nozzles in my Blackwing intake and I want to get it right the first time so I don't end up with a bunch of holes in it.

 

When I speak of tuning with nozzle, what I mean is use a 90* or two and get it close to maf 3 or 4 inches. then all you have to do is rotate nozzle untill desired a/f is reached. if you mount to far away then it will read lean and no way to adjust a/f accept going into computer. In my personal web in pics section is a black wing with known good loctions marked.
Robert

 

10.85 run today, more left in it. Only 5 runs so far, but working better than great. Will do a follow up thread with more info later.
Robert

 

Congrats on the new best Robert
BTLFEDSS

 

Thanks Matt, I must have missed ya the first time around (added my new time in original post). Yea, i did the return/reg cause i didn't want any deviation in the psi at highest demand, considering I am pushing it on a stock internal ls6, so everything in tune must be right on. Yes, this was/is my personal Z06.
Robert

 

The car is running great! The car was tuned without any nitrous runs. The A/F on motor sits around 12.5-12.8 if I remember correctly. I'll post up a spreadsheet later. When we sprayed the 150shot after the tune, the bottle was almost empty and we only gained 85-90rwhp off of a 150 shot. I was there to tune not to make power as I had a motor only tune with advanced timing and needed it retarded! We also had some MAF issues we had to overcome.

The next time I had it on the dyno (dyno day).........the bottle was full and the pressure was way too high which made a lean spike. The pressure was between 1200-1250psi and the recommended pressure is 1050. BTW, the ws was set to come on at 4200 for the dyno only! Just to be safe! The first pull was the pull that made the most power.....559rwhp 578rwtq SAE! We also shut it down at 5000 rpms. So all that power was made within 800rpms! If I remember correctly, N20 makes its tq peaks at lower RPM's!

The next pull was made with me lowering the pressure and Robert drilled my fuel jet from .46 to .52! That made a real rich condition which was below 10.0, but the A/F system couldn't read that low! It still made 550rwhp! The next pull was made with 150's because I was getting freaked out by the A/F ratios that were going on! Both times the pulls were shut down at 5000rpms. My redline is set at 6800, so IMO this car could have made 600rwhp with the right fuel jets and the psi set correctly. I have since bought some more fuel jets to do some fine tuning and try to hit that goal! I'm willing to bet that once this kit is dialed in I'll see high 600's for tq maybe even low 700's SAE!!!

Roberts car is running strong no doubt and he is a great nitrous creator/installer. You should see the install he has on his Vette. But I think I can make much more power than I am right now with the 200's if I just get it figured out.......

There is more to come with this setup!!! I'll keep you all posted.

 

And i remember not even 2 years ago when some poeple used to call us pussies for running dry.
(I got a modified 2 stage NOS 5177, capable of 250 shot)

Just out of curiosity, I'm running 22* max timing (11.75 SCR, 8.65 DCR, .040 squish)
Am I too conservative on the timing?

 

Test and tune to find out . If the cars running to your satisfaction why change it?

Nice results Robert

 

Thanks, BTLFED and JoeyGC5.

Posted by Predator Z
Yea it amazing what the dry hits are capable of, and safely. I believe dry is the way of the future for FI cars.
On the timing, well max timing does not equal max power. Really the only way to know what timing is best is to dyno tune for max power and see if you get any kr. I would prob stay where you are for now if not getting kr unless you are on a small hit. It's hard to state an absolute number on the internet, to many variables per car.
Robert

 

When we gonna see some pics Robert?

 

Went to take some pics this weekend, but camera is on the blink, won't work anymore. By the way, I blasted it with a 250rwhp shot on 2-1/4 runs this weekend.
Robert

 

cool I still need to tune mine and need the now how !!

 

TTT, for the corvetteforum guys.
Robert

 

still no pics?

 

Got my new camera today, so depending on how my back is tommorow, I get some pics.
Robert

EDIT: Here is my current time slip, I think I can get a couple tenths off this, maybe this weekend.

and a printout of the a/f that dyno day, but it's more stable after some finetuning.

Robert

 

Pics in this thread,
Robert's N2O Pics
Robert

 

Awesome results Robert!