nate can u send me your dyno sheet
Email

 

Flying ****
I am trying to post a chart that I made based on the dyno sheets of Nates dyno yesterday. I made the chart in excell and pasted it to a word documet with my inpression of the how the dyno went. The message board keeps messing up my chart. I need the my post section to be wider.

 

Ahh, ok.

Hell, send me the chart, i would like to view it.

venomousmofo@socal.rr.com

 

Nate, send me a chart please. Thank you.

mts77@earthlink.net

 

Well I can't wait any longer for Nate to post information on the dyno of his truck yesterday so I will start with some information.

The dyno was done on the same dyno that he dynoed his truck on 03/22/2003. The differences include the addition of an electric fan, spark plugs, NO2 (not used for baseline) and computer re-flash. I believe that the dyno software compensates for weather conditions but on 03/22/03 the temperature was 65 degrees and on 7/8/03 it was 99 degrees. The two dyno conditions were not as equal as I would like to have seen because of the installation of the NO2 system. The system manipulates the vacuum pressure of the line going to the fuel pressure regulator. I don’t know if it affects the vacuum pressure all the time or only when the system is used. These are just the facts form what I saw and what the dyno operators said of the results.

Here is a chart that I made form the dyno sheets. On 3/22/03 Nate made more HP and TQ but his AFR was consistently one point leaner. The dyno operator felt that it was because of the changes to the fuel pressure regulator (due to the NO2 system). As I said before I don’t think that this gives us a true apples to apples comparison. The most interesting thing about the program (re-flash) is that it seemed to adjust for different jets for the NO2 system. With the fuel pressure regulator vacuum line modified the fuel ratio was consistently rich both with and with out the NO2. Run.006 is with the NO2 system completely hooked up but not spraying. Run.001 is when he dynoed on 03/22/03 Run.012 is with a 45 NO2 jet with the fuel pressure regulator vacuum line returned to stock. Run.011 is with a 50 NO2 jet with the fuel pressure regulator vacuum line returned to stock. I do not know what each jet size equals in HP shot but it was supposed to be a 55 to 75 lb adjustable dry kit. As you see in runs 011 and 012 the AFR stayed in the mid 12s even as we adjusted the shot. The dyno operator said that it was only the second time that he has seen a computer adjust to the different shots of NO2. He said that he was surprised that Nate could run the truck with three different setups and the same chip/program. I wish we could have gotten a run with no NO2 and the fuel pressure regulator vacuum line returned to stock. We got a total of 9 dyno runs with the dyno operator changing jets and playing with the vacuum lines. We only paid for 3 runs and a NO2 bottle fill so we did not want to push our luck. As the dyno operators changed jets and ran the truck they kept saying that they expected the truck to run leaner with each step up in jets, one of the guys said “I don’t know how this thing keeps hitting around 12.5:1 AFR”. One of the guys then questioned us as to who wrote the program and how to get in touch with them.

RPM 3.0 3.5 4.0 4.5 5.0 5.5
Run.006 HP 160 300 350 360 368 345
7/8/03
TQ 280 458 450 420 380 325
AFR 15:01 12:01 11.5:1 11:01 10.9:1 10.9:1
Peak # HP 368.3@4.9 TQ 457.9@3.5



RPM 3.0 3.5 4.0 4.5 5.0 5.5
Run.001 HP N/A 175 350 380 375 370 3/22/03
TQ N/A 250 460 440 410 350
AFR 15:01 12.5:1 12.2:1 12:01 11.9:1
Peak # HP 392.4@4.8 TQ 470.8@4.1




RPM 3.0 3.5 4.0 4.5 5.0 5.5
Run.012 HP N/A 285 380 430 440 435
7/8/03
NO2 TQ N/A 440 510 510 460 410
AFR 12.5:1 12.4:1 12.4:1 12.4:1 12.4:1 Peak # HP 514.0@3.7 TQ 445.2@4.8



RPM 3.0 3.5 4.0 4.5 5.0 5.5
Run.011 HP 150 298 400 450 450 440
7/8/03
NO2 TQ 260 445 540 540 480 420
AFR 15.0:1 12.0:1 12.9:1 12.7:1 12.6:1 12.4:1
Peak # HP 462.9@4.9 TQ 553.3@3.9



My personal opinion is that the re-flash will do exactly what some have said it would do and that is adjust to SOME modifications within reason (1-6lb over pulley, up to a 100 shot of NO2, difference in atmospheric conditions). I don’t know of any single program chip that can do that. This is just a recap of what I saw with my own two eyes and the data off the dyno sheets. I will let Nathan post his dyno sheets.

 

I'm trying to follow this. I had an old NOS system I used for a couple of weeks last year. It had a vacuum system which would cause the regulator to hold around 60 or something psi fuel pressure when I sprayed. Are you saying that when you were dynoing the truck with the system intact your air fuel ratio was higher with the higher pressure and lower with the vaccum at stock levels and spraying?

 

easterisland

With the fuel pressure vacuum system for the NO2 system set up the truck would run rich both without NO2 and with NO2 (10.7:1 to 11.0:1). With the vacuum line at stock it ran around 12.5:1 both wiht NO2 and without NO2.

 

Just incase anyone has any trouble trying to read those numbers, this is a little more eye friendly format:

[code]
Run.006 7/8/03
RPM 3.0 3.5 4.0 4.5 5.0 5.5
HP 160 300 350 360 368 345
TQ 280 458 450 420 380 325
AFR 15:01 12:01 11.5:1 11:01 10.9:1 10.9:1
Peak #
HP 368.3@4.9
TQ 457.9@3.5


Run.001 3/22/03
RPM 3.0 3.5 4.0 4.5 5.0 5.5
HP N/A 175 350 380 375 370
TQ N/A 250 460 440 410 350
AFR 15:01 12.5:1 12.2:1 12:01 11.9:1
Peak #
HP 392.4@4.8
TQ 470.8@4.1


Run.012 7/8/03
RPM 3.0 3.5 4.0 4.5 5.0 5.5
HP NO2 285 380 430 440 435
TQ NO2 440 510 510 460 410
AFR 12.5:1 12.4:1 12.4:1 12.4:1 12.4:1
Peak #
HP 445.2@4.8
TQ 514.0@3.7


Run.011 7/8/03
RPM 3.0 3.5 4.0 4.5 5.0 5.5
HP NO2 150 298 400 450 450 440
TQ NO2 260 445 540 540 480 420
AFR 15.0:1 12.0:1 12.9:1 12.7:1 12.6:1 12.4:1
Peak #
HP 462.9@4.9
TQ 553.3@3.9
[/code]



[edit] correct error from below[/edit]

 

03Lightning, it looks like the HP and TQ figures in run .012 are switched, correct?

Jim

 

Yes the peak HP and TQ are switched. It should be
Peak #
HP 445.2@4.8
TQ 514.0@3.7

 

Hey fellas, I was too tired to post last night. The truck ran pretty good even though it was hot as hell. The guys at SpeedWorks made the dyno painless, especially for helping us determine problems with the vacuum line on the N.O.S. kit going to the regulator. The problem was is that it was conflicting with the computer (reflash) from doing its job. I think it probably messed up my baseline a/f/We took it off and that damn computer adjusted the a/f ratio as needed. I couldn't believe it. We threw all kinds of jets at it with the fuel vacuum off the kit and the computer adjusted the a/f to make it safe. The reflash probably actually stoped the messed up NOS fuel vacuum line from doing harm to the motor. The truck runs strong and is more refined. I told the guy that did the re-flash in my mod setup that i was only going to be running up to a 75hp shot. So we actually reached a point where it could adjust for anything we threw at it except where we were actually pushing the threshold on the tune . heh. The threshold was more around a 100-110 shot. The shot was pretty safe ,but if we bumped the jet up any farther it probably would (edit: take longer to reach it's a/f goal by adjusting from the lean ratio of more nitrous). Thats where you see the 462 rwhp on a size .52 jet spraying with out the regulator vacuum. It was a safe shot from the computer actually adjusting the a/f from I think it was a 15 something back down to about a 12.4. Thats just pretty damn impressive to me. I'm happy with the results. I need to find a .50 jet to run .

\Even with the hot weather my truck runs alot better than it did with the chip. And ofcourse, how can you compete with spraying any shot you want up to 100hp and it being safe?



edit: Vinson is emailing the dyno sheets, so if your address is in here you will be recieving them.

 

Yooo Hooo

Team Truck Blower
Team Naysayers

Where are you?




So now what, boys?

 

I have only made a couple of posts on these reflash threads so don't take it that I'm bashing anyone.

What mods did you have to get the 462? It says 110 hp NOS and what else the 4lb lower? If that was all you got with an air/fuel of 12.4:1, I wouldn't be overjoyed.

The fact that you are happy is the main thing.

 

It was a 4lb, NO2, throttle body, filter, electric fan, re-flash. Oh, I think that it was a 75 hp NO2.

 

A/F's of 15 down to 12.4? come on ****(cheerleader for TRF), you tell people all the time that 12.4 is dangerously too lean.

and you had a vacumm leak on top of that, so the computer should have been adding fuel, so with the vacumm leak fixed, your gonna be even leaner.

Never said the reflash wasnt gonna work, just doubted all the armchair tuners here spouting off info that they couldnt back up. None of you ever did answer Beef's or my questions.

Now lets get some track comparisons and some accurate info on how the new reflash actually determines A/F strategy.

Congrats on the dyno runs.

CUT THEM AND VOID