Descriptions can be found in the photo detail. The first two graphs have the correct A/F ratio with the nitrous after we fixed the N.O.S nitrous kit fuel regulator vacuum problem. It was fighting the computer from making correct a/f adjustments through adaptive strategy.

https://www.f150online.com/galleries...4867&anum=3451

https://www.f150online.com/galleries...4868&anum=3451

https://www.f150online.com/galleries...4869&anum=3451

https://www.f150online.com/galleries...4870&anum=3451

 

bad linky

 

fixed.

 

I'd like to see dynos off the Nitrous....guess I'll have to do my own.

 

from the other thread i belive only 11 and 12 are wit Nos

 

There are 2 baselines there cyntax. the one with 368rwhp and 370 .

 

Wait, so did you do a dyno for the reflash only? That's what I'm curious about the most...

 

Nate, Im sorry if this starts to hijack this thread elsewhere. You say your tune is fat because of Vacuum leak ? Vacuum leaks after the mass air will cause you to lean out not richen up, am I missing something ?Your numbers are impressive and the most important thing is you have stated your happy with your new product. I just have 2 points to make:


1) A/F is not a straight line like some of the Proflash people said.

2) Its obvious your truck is running very fat without N20 but on N20 it leans out. It was stated before that a reflash would keep the same A/F as mods were added.


It seems like everything Mike Wesley and even Sal have said, they both achieve the same goal.


Thanks for the info and results you have shared with us Ive been waiting for the Predator and if its not out in a week or so, Im going to do this reflash because I dont want dealer giving me crap for a chip when my A/C or brakes dont work.

 

Didn't they have problems with the nitrous?

 

Cyntaxx, Im sorry I didnt make it very clear. What I meant was some of the Pro Flash people ( Wont name names ) made it seem as if you could add mods ( more boost or N20 ) and A/F ratio would remain the same. This is what I meant when I said it leaned out, the Pro Flash people were wrong or misleading. I didnt mean he was running lean on N20.

 

I believe the reflash can adapt to a certain amount of changes. However, I wouldn't expect it to hold true to the same AFs with a 110 shot of nitrous.

Hopefully common sense will prevail here.

 

My thoughts exactly! But what do I know?

 

This isnt common sense for somebody who has no understanding in the dynamics of how the stock CPU tables work and stock cpu processes its information. Give me a Speed Pro/ Fast and I somewhat have a idea but I have no idea how a stock CPU is programed to ****ion. Instead I must read thru all the bullchit and false info guys post on here.If we all understood this, we could burn our own chips and the tuners wouldnt be needed. Like I continue to say, Some of the pro-flash people in other threads lead me and others to beleive that a reflash would have not only a straight A/F ratio. It was also stated that a reflash would be able to compensate for extra boost or small shot of N20. That is not the case, what I see in this case is the same thing that happen on my stock truck. Stock pullied A/F ratio on dyno was in 10something:1 area, I added a 6lb pulley (no chip) and it simply leaned out now to low 12something:1.


Its not adjusting to anything, the extra air is leaning out the mixture. If it was adjusting the a/f ratio would be closer to the base pull. As Ive said, vacuum leaks after the mass air cause you to run leaner, what would the real a/f be without the Vac leak ?

 

I understand where you're coming from but you must realize that there are tons of information chip tuners will not disclose either. Oftentimes it's a crapshoot sending in a list of mods and hoping your tuner got it right. This isn't meant as a slight towards any particular tuner, but chit happens. There has been more than one Lightning vendor on this forum that has caused someone's truck to fail due to a chip. Not saying that 100% of the fault is the tuner's, but *some* of it is.

Ask yourself this...why do many Lightning vendors give you a pig rich tune on a street program? Most are aiming for mid-11s these days on a dyno, which runs .4 - .9 pts leaner with a tailpipe sniffer. It's because mistakes of running lean have been made in the past and they want that increased margin of safety. Bottom line: it's C-Y-A.

And of course, it doesn't take any real knowledge in PCM calibration or function to know that a 100 shot of nitrous will affect AF ratios.

 

I think some of you guys are not understanding. There was NO vacuum leak. The old school N.O.S kit has a fuel regulator vacuum with it. It's a T. In this T is fuel jet....just like the one put into the nozzle. This jet changes the fuel pressure. It was fighting with the computer to make a correct adjustment, and I ran lean. I took it off and it ran fine. I sprayed with it on and off....and the nos fuel regulator vacuum T caused a rich condition everytime. The sparys without it on is what you see. Nitrous is wacky. You will always run a little bit leaner. This is suprising seeing as how i was just shooting a shot of nitrous in there with nothing to really controll it except the spray jet and the computer did the rest of the work. My results are not a prime example due to the N.O.S. vacuum T. There was no leak. It was causing problems. The computer adjusted a/f for every shot we threw at it.

edit: Buzz. Do you understand what i said before. We changed out jets one after the other for all kinds of nitrous shot sizes. Do you understand? from 50hp to about 100-120hp. It corrected it. The 462rwhp is the biggest shot we sprayed, and the 445 is about a 75. I told the recalibrator that i was only going to be using up to 75. It adapted. you understand?