Ive been doing nothing but tuning and Ive gotten my ve table within 3% error running sd. Also when running sd I have no kr and have been dialing in the maf table using supras sheet. After several runs (around 25k values) with lots of good info over the past couple days I can only seem to get good readings between 2500 and 9250 Hz after that the adjusted values stray from the curve and dither off into left field. On a better note my maf readings that are on curve are well over a stock 5.3 they are almost perfectly matched or a little over the manero, I have an aem intake and stock throttle body.

Whenever I do run the maf I get LT trims that are all negative and go up to -11, I also have kr so Im thinking it just needs more calibration and is off. What am I missing? Why does the truck run better in sd? The maf calibrations I believe are the culprit but they look spot on. Is it the combination of the mass air values with the ve values that is giving crazy values.

Does anyone use hand smoothing to complete the rest of the graph?

 

you may want to look into your timing tables first on this. remember that with the truck in speed density the timing is selected based on how much air the computer things is coming in. with the maf connected you could easily be off by a few degrees difference with an actual reading of how much air is coming in. if this is the case you can find this out by running the truck under as close to identical conditions and see if the log shows you are running alot less or more timing with and without the maf.

unless you've changed the stock maf out or taken out the screen there isn't much reason to go through and change the maf hz value's. just leave the maf on there and tune it. if you don't plan on running speed density all the time then you might as well tune the truck with the maf on there.

 

now Im getting dtc rich banks 1 and 2, I would be worried if there was black smoke or no power but this thing pulls like its gonna take me to the moon, I mean it feels dead on. Do I need to look into tuning the injectors. I appreciate any thoughts.

 

I like running the mass air for the reason of accounting for different climate changes altitude, moisture air density etc. not to mention gas mileage. When I go speed density I have no problems the ve is dead on and the maf hz that Ive tuned look dead on also this is from redsupras table

Im now wondering if I need to tune the injectors to go with the increased air and power. I havent researched this. From the way the truck feels and sounds it unbelievable it feels so much faster than when I was running 9.00 1/8

 

i would leave the injectors where they are. when you are tuning with the maf on use the logs to try to get your LT's where you want them try and do it in small rpm area's at one time. run some logs on it and when you're done scroll through the charts to find specific area's where you are working on. then use the table display to look at what to change. take a look at the map reading and rpm as well as your LT's. if your LT's are say -11 at 2100 rpm and 50kpa, go into the editor and change your VE table in the 2000 and 2400rpm area of 45, 50, and 55. now keep in mind that it has to be smooth of the other surrounding numbers. since you are still learning this though, work on the smoothing later. try to keep your range small like that until you get your LT's to within your liking (i try to shoot for a constantly veriable +3 to -3 with zero being the actual target). everytime you get one area within an acceptable range then move on to the next. making large changes at once is something you may do once you have learned alot more about the programming, but i don't recomend it to start with. keep in mind though that timng goes hand in hand with this. if you're that rich you may just be lacking timing in them area's. you can try adding timing by doing the same thing using the chart and table section of the logging and reading from the rpm and dynamic cylinder air. if you're really rich try to add a degree or so of timing at a time in the area it's very rich in to see if it makes any difference and at the same time watching for KR*. KR* is bad, you don't want that.

just a few beginner pointers to go by.

 

I tried tuning with that method over the past couple weeks with the maf still on and It doesnt seem to work thats why everyone tunes the ve in SD. Right now my sd ve table is with in +-3 and alot of cells are 0, the thing runs great in sd, I used values gained from the sd ve in redsupras worksheet and also soundengineer, supras tunes the maf from dynamic air and Hz sound from sd ltft. The values I got were right in line with what was expected. Then your supposed to use those recalibrated values with the maf and turn it back on, when I do this lt's are all out of whack Ive tried tuning the ve for use with the maf the problem there is its constantly changing with temp barometric pressure moisture etc... so its next to impossible.
I guess Im coming to the conclusion that you cant have your cake and eat it too I want the best of both worlds SD and MAF

If I was overly rich I wouldnt be making any power and I sure wouldnt be averaging 15 mpg in the city and around 20 on the highway.
Which would you choose SD or MAF

 

i would go with the maf by far. are you running stock injectors yet?

 

Speed density makes it very easy to get your trims inline if you follow the steps correctly. I ran one 10 minute log the other day, tuned it, plugged the maf back in and the trims now range from -3 to +3. They were at -10 to +10.

I'd try logging with the stock MAF HZ table. See if your trims still stay way negative.

How many times have you ran Supra's spreadsheet? You may have to try logging a few more times to get the trims back to where they are during SD.

 

I'd recommend running SD permanetly but, one of the benefits of this is you can run a straight bellow in place of the MAF, gaining a pony or two. Well, our IAT sensor uses the MAF location. The VE table needs the IAT readings to run calculations.

The GTO guys have found a way to relocate it. http://www.ls1gto.com/forums/showthread.php?t=28166

 

Ive ran his sheet 3 times I also tried the ltft sheet for the maf 1 time, thats a good idea to log the hz Ill give it a shot. Here is a copy of the maf table graph from supras sheet Im using only the good values its hard to get anything over 10k