My datamaster files.....

[WyoSyclone]

Re: My datamaster files.....

I'm looking at run #4.....
17.1 lbs of boost
11.8 afr's.... I'd run a little richer if it was me.... 11.2 maybe
intake temps are OK for that scenario (cruising) 106f goes up to 123.
Looks like you're running out of fuel - STerm is adding and inj DC is 117%
you're running 63mph to 80 in 3 seconds which seems OK.
Your KR is a little high - 5.1... could be that getting richened up a bit will help that.

Do you know what your fuel pressure is set at? I'm set at 48lbs static (engine off, system primed), and that seems to work well for me (mods in my sig).

I would try a rolling start in 1st gear from about 3mph (shifter in D)..... make sure the Knock window is active and get out of it fast if you see anything greater than 6 degrees of KR.... your truck looks like it is running similar to mine. The shift into overdrive can be pretty brutal on these trucks... lots of aerodynamic drag and shifting right into the highest torque area of the engine.... KR can sneak up on you fast here.. also be ready to get out of it if KR spikes.

 

[SY2767]

Re: My datamaster files.....

I'm looking at run #4.....
17.1 lbs of boost
11.8 afr's.... I'd run a little richer if it was me.... 11.2 maybe
intake temps are OK for that scenario (cruising) 106f goes up to 123.
Looks like you're running out of fuel - STerm is adding and inj DC is 117%
you're running 63mph to 80 in 3 seconds which seems OK.
Your KR is a little high - 5.1... could be that getting richened up a bit will help that.

Do you know what your fuel pressure is set at? I'm set at 48lbs static (engine off, system primed), and that seems to work well for me (mods in my sig).

I would try a rolling start in 1st gear from about 3mph (shifter in D)..... make sure the Knock window is active and get out of it fast if you see anything greater than 6 degrees of KR.... your truck looks like it is running similar to mine. The shift into overdrive can be pretty brutal on these trucks... lots of aerodynamic drag and shifting right into the highest torque area of the engine.... KR can sneak up on you fast here.. also be ready to get out of it if KR spikes.

My fuel pressure is set at 40 lbs truck idling vac line off. I will turn it up as soon as i can track down a gauge, if i can't borrow one i will just buy one i guess. Thanks guys for looking at this for me because i know nothing on how to read datamaser and this really helps me to learn.

 

[Tooky]

Re: My datamaster files.....

OK I took a quick look at all 4 files.

#1. Files test3 and test4 both show a BARO reading of "84.9", while test1 and test2 show BARO reading 96.7. I explain this in my PowerTunePlus.com Tuner's Guide to DataMaster - our chips all have a bug in them where randomly, the "barometer" reading will read lower than usual, and result in abnormally high boost pressure readings, for example readings beyond "15 PSI" on a 2 Bar MAP sensor!!! (Something that is normally impossible). So SY2767 was not really hitting 17 PSI, at least according to DataMaster. BUT, the MAP sensor was getting maxed out (flat-lining) so there's no way to know the REAL boost peak, and the fact he says his Autometer boost gauge is only showing 8 PSI makes things even more confusing.

Like I said on my Tuner's Guide - if your BARO ever reads stupid (10-15 KPA less than normal like this example), all you have to do is turn the key off for a second, and restart the truck and verify on DataMaster that the BARO went back to the normal 96 KPA reading (or whatever is normal for your locale - in the high mountains 84 KPA could be normal.)

#2. Since it's a stock chip, the AFR Target readings are actually useless. On a wideband-patched chip, these WOULD be actual wideband AFR readings, but not in this case of a stock chip. (I mention this on my Tuners' Guide, too!!)

#3. As far as the run itself, it looks to me like it's going rather lean all the time at part throttle (which is the only time the stock O2 sensor can tell you how rich/lean it is). STerms as high as 181, something ain't right!! I would start by bumping up the fuel pressure 5-10 PSI and see where it changes them!! Look at file test1.uni, starting at Record #289. He's starting from a 0 MPH stop and gently accelerating. Turn on graphing for STerm-Cnt. It rises CONSTANTLY as he accelerates, because it's so lean! Look at the O2 mV confirming this... 22mv!! Way lean.

SY2767: Does this thing hesitate or run weakly when you gently accelerate from a stop?

#4: One last thing I noticed. On run test4.uni, it looks like you're hammering the gas from a 50-60 MPH roll with the transmission in OD (4th gear overdrive). I would be careful doing this, high speed WOT downshifts in 4th gear can be very hard on the 700R4 transmission and also can create dangerous boost spikes. What I try to do, to be easier on my transmission, is to gently downshift into 3rd around 50 MPH and let the truck "stabilize" for a second, and then hammer it.

 

[SY2767]

Re: My datamaster files.....

OK I took a quick look at all 4 files.

#1. Files test3 and test4 both show a BARO reading of "84.9", while test1 and test2 show BARO reading 96.7. I explain this in my PowerTunePlus.com Tuner's Guide to DataMaster - our chips all have a bug in them where randomly, the "barometer" reading will read lower than usual, and result in abnormally high boost pressure readings, for example readings beyond "15 PSI" on a 2 Bar MAP sensor!!! (Something that is normally impossible). So SY2767 was not really hitting 17 PSI, at least according to DataMaster. BUT, the MAP sensor was getting maxed out (flat-lining) so there's no way to know the REAL boost peak, and the fact he says his Autometer boost gauge is only showing 8 PSI makes things even more confusing.

Like I said on my Tuner's Guide - if your BARO ever reads stupid (10-15 KPA less than normal like this example), all you have to do is turn the key off for a second, and restart the truck and verify on DataMaster that the BARO went back to the normal 96 KPA reading (or whatever is normal for your locale - in the high mountains 84 KPA could be normal.)

#2. Since it's a stock chip, the AFR Target readings are actually useless. On a wideband-patched chip, these WOULD be actual wideband AFR readings, but not in this case of a stock chip. (I mention this on my Tuners' Guide, too!!)

#3. As far as the run itself, it looks to me like it's going rather lean all the time at part throttle (which is the only time the stock O2 sensor can tell you how rich/lean it is). STerms as high as 181, something ain't right!! I would start by bumping up the fuel pressure 5-10 PSI and see where it changes them!! Look at file test1.uni, starting at Record #289. He's starting from a 0 MPH stop and gently accelerating. Turn on graphing for STerm-Cnt. It rises CONSTANTLY as he accelerates, because it's so lean! Look at the O2 mV confirming this... 22mv!! Way lean.

SY2767: Does this thing hesitate or run weakly when you gently accelerate from a stop?

#4: One last thing I noticed. On run test4.uni, it looks like you're hammering the gas from a 50-60 MPH roll with the transmission in OD (4th gear overdrive). I would be careful doing this, high speed WOT downshifts in 4th gear can be very hard on the 700R4 transmission and also can create dangerous boost spikes. What I try to do, to be easier on my transmission, is to gently downshift into 3rd around 50 MPH and let the truck "stabilize" for a second, and then hammer it.

Thanks for the input! My truck usually runs fine gently accelerating from a stop, but it does surge while idling sometimes. After i bump up the fuel pressure i will do a couple of more runs as suggested with the truck in D and post them. I was told by the previous owner that the trans was rebuilt as strong as a 700r4 could be, i have no way to conform this other than the B&M deep pan and braided trans lines plus it shifts very firmly.

 

[turbodig]

Re: My datamaster files.....

Tooky hit the nail on the head.

You need to do a log from a dead stop, trans in D, no boost launch. Stomp the pedal.
Go up to 100 MPH, if you can get by with that.

Files from a roll aren't as useful.

 

[SY2767]

Re: My datamaster files.....

Tooky hit the nail on the head.

You need to do a log from a dead stop, trans in D, no boost launch. Stomp the pedal.
Go up to 100 MPH, if you can get by with that.

Files from a roll aren't as useful.

Will do.

 

[SY2767]

Re: My datamaster files.....

Its been a very long time and how times have changed..... i now have a 2.5 year old son and my truck has been collecting dust for quite some time, just out 2-3 times a year!! Looking for a TY that's more user friendly with a kid, plus i want something to pass down to him when he gets old enough.... I should do that last run soon. LOL