Have you maxed the single nozzle kit?

[turbows6]

I have Razor's kit on my TTA, and have a second nozzle kit that I have not installed. I was just wondering how many people have maxed out the single nozzle? Running 25#'s if I have the gain turned all the way up, My o2's are dipping into the .780-.790 range with the initial at the 3 o'clock position. (5 o'clock being maxed out on initial and gain)

I have really just now gotten the car going with most of what I wanted to do, and it feels like it pulls a LOT stronger than my low 11 second Dart. I'm just thinking that from what I feel the single nozzle would push a car to 10.0 easily. Am I wrong?

 

[GNVYUS 1]

I've maxed it out, but due to completely different reasons from everyone else on here. IMO, the only true way to know when you're maxed out is to know your MAT temp. You can literally keep pumping alky until the MAT is 70 degrees if you wanted.

Basing an alky max out test on 02 millivolts tells you nothing about the kit. If you put the alky system on max and run 22psi of fuel pressure, that will kill 02's yet MAT's could be in the 80's.

 

[Razor]

Your to adjust O2's(air fuel) with gasoline and control knock with the alcohol.

"if" you are maxed out when the knob is on 8, air fuel is where it needs to be(780-800), and you still get some knock... then add another nozzle.

I dont see a reason your setup should have to run the initial that high with a gain setting that high unless the alky pump is weak, you have a leak on your alky system, or your covering up a poor fuel delivery issue.

The idea behind the twin nozzle is to decrease pump pressure and increase volume at a lower pressure keeping volume up. Example single nozzle your at 180 PSI. Add the twin nozzle now bring pressure down to 130 PSI. You have head room for more pressure/volume.

Think of a motor that "can" turn 9000 rpm's. It will live longer at 8000 rpm's than it will live at the 9000 it can turn. So if your running a pump maxed out and it where to lose a little pressure/volume you'd be setting yourself up for a problem. Always plan for headroom. Never run any system maxed out as it will fail sooner than latter. This applies to practically everything in life.

Can a single nozzle kit support 10.0's even 9's.. sure with the proper motor. Same motor can run high 10's on pump gas and 16 PSI boost. Can a single nozzle support 10.0's on a motor that runs 12's on pump gas.. dont think so.

Suggest you test your system for pressure.

 

[turbows6]

I figure that it's just as easy to turn the alcohol kit up as it is to add fueling through the chip, and it cools the intake more. Why not? I'm not having any problems with spool-up and the engine is making a lot of power and running smoothly.

The reason I am running the initial high is because it runs smoother at part throttle (ex. holding 8-10 psi in 3rd gear) The kit is set to turn on at 10#'s

FWIW I'm pretty confident that the car would run faster than 12's on pump gas only. Eric Marshall said the fueling in an alcohol chip is identical to a chip burned for 16#s, so when I first got the car going I just ran pump gas. I know it's not the track, but I ran a friends Heads/Cam LS1 Camaro and walked away from it pretty hard and it made over 400 rwhp on the dyno and that was with no methanol on 16#s.

I understand that it's not a good idea to run a system on the edge, but after seeing that there was plenty of adjustment room to the up side with heads/cam and the typical mods on 25#'s I was starting to question why it seems a lot of people were adding a 2nd nozzle.

 

[Blazer406]

I figure that it's just as easy to turn the alcohol kit up as it is to add fueling through the chip, and it cools the intake more. Why not? I'm not having any problems with spool-up and the engine is making a lot of power and running smoothly.

The reason I am running the initial high is because it runs smoother at part throttle (ex. holding 8-10 psi in 3rd gear) The kit is set to turn on at 10#'s

FWIW I'm pretty confident that the car would run faster than 12's on pump gas only. Eric Marshall said the fueling in an alcohol chip is identical to a chip burned for 16#s, so when I first got the car going I just ran pump gas. I know it's not the track, but I ran a friends Heads/Cam LS1 Camaro and walked away from it pretty hard and it made over 400 rwhp on the dyno and that was with no methanol on 16#s.

I understand that it's not a good idea to run a system on the edge, but after seeing that there was plenty of adjustment room to the up side with heads/cam and the typical mods on 25#'s I was starting to question why it seems a lot of people were adding a 2nd nozzle.

Are you closed loop with a wideband at WOT? If not.... you are walking a razor blade....... no pun intended.... As Julio mentioned.... might check on the fuel system. If there is an issue with the fuel system....you could be in for it.

IMHO....use only as much alky as required to supress knock.

FWIW.......If your car is o2 correcting at WOT with a wideband..... adding more alky later won't hose the tuneup to bad.

 

[Quik Six]

You haven't said what injectors you are using.

I'm using dual nozzles with factory PAC settings and controller set at 6. Injectors are 57#'s and they are reaching 95% and higher DC maintaining AFR of 10.8. Car makes good power but I do have some flutter at the top end of 3rd. Difficult to maintain boost level at a constant level but RJC monster puck may fix that.

Results with a single alky line was spooky to read on the computer screen. Same settings as above on the SD chip. IDC went to 120 which I understand is not possible but the 10.8 AFR was not maintained; 11.1 was the result. No knock and O2's were in the low 800's. EGT's were good although higher than 2 nozzles. No flutter at all with this setup.

I would prefer to use a single and plan on trying a few more things before I give up on single line.

Good luck to you. Keep us informed of your progress.

 

[Razor]

Always start low and work your way up.

If you dont have a single nozzle system working 110% then you have no business going up on boost and adding another nozzle.

Working 110% is just not the alky, but boost control/fuel system/electrical/etc.

Those who simply crank the boost up and expect wonderful things to happen all of a sudden, typically reach dis-appointment much sooner than latter.