Car is a 06 pontiac grand prix gxp 5.3L ls4 im currently using hp tuners beta 2.2x anybody got any clues? thanks for any input
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Car is a 06 pontiac grand prix gxp 5.3L ls4 im currently using hp tuners beta 2.2x anybody got any clues? thanks for any input
2006 GXP with E40 will have two MAF tables - low and high.
Engine>Airflow>General>MAF Calibration.
Thanks shrek i needed that clarification....so if were to swap MAF's how should i go about tuning it then?Quote:
Originally Posted by Shrek
So your question is not - "Where are the MAF tables in an unfamiliar controller?" (E40) - but rather, "How do I use HPT to make tuning changes?"Quote:
Originally Posted by GXPLS4
Regarding the tuning process - tuning the MAF is probably the most straight forward tuning endeavour. You could use fuel trims or a WBO (wideband oxygen sensor) - a WBO is preferable.
Given your question, you are obviously a new user of tuning software. Search this Forum and others, for tuning tips and "How to" documents - there is a lot of information out there.
Books on the subject, or the first DVD set by Greg Banish are also a great resource for new tuners.
Once you have self-educated on the basics of how to use the software to tune the MAF, VE, etc. - post questions regarding the validity of your results - and these will probably get answered.
A general question like "How do I tune the MAF?" - will often go unanswered, as it is indicative that the poster has done little or nothing to learn how to use the software on their own via research / books / DVDs / courses.
Good answer on guiding him to learn how to tune, but I also feel these forums really should have some community written guides that Chris or Bill could sticky for people. Over the years, all I've seen is people saying "Buy this! Buy that!" when we could easily work together instead of monetizing everything.Quote:
Originally Posted by Shrek
However, there are some very good resources, especially Greg Banish's publications that are a must-read in my opinion!
Ok, now that my rant is over.
OP, check out this link for some histogram configs for E40 with the low/high MAF tables:
http://www.hptuners.com/forum/showpo...85&postcount=2
You will need to put your vehicle in to Speed Density or MAF only mode and tune each mode one at a time. The HPTuners help file should tell you how to do this. If you search for LS2(even though you have LS4, use your head here) tuning guides with Google, you should be able to find something.
Check this out from the HPTuners forum, follow Bluegoat's directions and focus only on how to tune your MAF for now. Not the best, but helpful: http://www.hptuners.com/forum/showthread.php?t=24869
If I had an E40 equipped vehicle, I'd give a shot at writing a step by step with screenshot guide on how to do this. I do have an E38, so I may write something up for it. The only difference when tuning MAF for the E38 is that I have one table, not a high and low, but the concept is the same.
Many E38 operating systems have 2 maf tables.Quote:
Originally Posted by Gh0st
Hello Ghost,Quote:
Originally Posted by Gh0st
I agree that "How to" documents are best generated by the Forum membership. While other Forums seem to do this on a frequent basis, this particular Forum does not.
That said, there is a ton of information on this Forum contained within the threads. The individual would have to take it upon themselves to organize this scattered information into a cohesive document. This could be a simple matter of copying relevant information from a thread into an ongoing Word document.
All it would cost is the person's time - a free education as it were.
I operate an automotive business specializing in custom vehicles - but I still answer questions on this Forum (and others) to help those who have genuinely attempted to problem solve on their own - but have hit a roadblock.
Out of respect for the time of the rest of the Forum membership, before posting a question of this Forum, a minimum basic tuning knowledge is required.
The "I've tried nothing, and am fresh out of ideas" approach of some posts, disrespects the limited time the knowledgeable have to contribute to this or any Forum.
The onus is on the individual to learn the basics for themselves - either formally or informally.
One good rant deserves another .......
Guys i totally get the search function and yes im a noob to hpt as i just came from using diablo intune which is a completley diffrent ball game. There are plenty of guides on here but im not clear on the e40 portion because it has low and high maf tables. and btw im looking to replace to the MAF with a 85mm unit soim looking to change MAF tables and tune accordingly from there. but doing so with 2 MAF tables is what confuses meQuote:
Originally Posted by Bill@HPTuners
Glad to hear you have been getting up to speed on MAF / VE tuning. If you understand the concept of correcting a single MAF table based on WBO data - a calibration with two MAF tables is really no different to tune.Quote:
Originally Posted by GXPLS4
Just make sure the value at 5800 Hz in both tables is identical. 5800 Hz is the upper most cell in the Low MAF table, and the lowest cell in the High MAF table.
Log data, apply corrections, hand smooth the curves - and confirm the 5800 Hz cells before a reflash of the new tune.
awesome thats kinda how i thought it should be just wasnt confident in that realm yet. thanks EVERYBODY im sure ill have more questions in the futureQuote:
Originally Posted by Shrek
Well that just ruins everything for me then. I guess if I write anything up it will have to be specific to my application :cheers:Quote:
Originally Posted by Bill@HPTuners
Nah man I agree with you. The only way I learned was research and trial and error. I just want to take what I know and what others may know to help people new to tuning. There's no reason people should HAVE to bust their ass to find information is all I'm getting at. I certainly don't believe we all should know how to tune before asking a question...the whole point of the forum is to share ideas and discuss :drivin:Quote:
Originally Posted by Shrek
I agree, however we currently support some 30+ controllers, each of which is different from the next so its up to the community to build a how to. I have no problem stickying a how to document that someone has done but they've already been done in most cases and just needs to be modified slightly for a specific application ie if someone did a maf tuning how to document for an LS1 it would take very little effort to convert that same how to doc for an E40, E38, E67, E37 or similar pcm.Quote:
Originally Posted by Gh0st
looks like I may have even made one back in 08, not sure if its finished or not though lol
http:///files.hptuners.com/support/SDTuningGuide.doc
The other thing to be careful of, is how you setup your histogram in the scanner relative to the 5800hz section. If you set it up to reference the MAF tables in the PCM with your AFR % Error, you're going to run into a situation where whenever you're above 5800 HZ, any error at all will hit the 5800 HZ cell in the low table, and whenever you're below 5800 HZ, any error will hit the 5800 HZ cell in the upper table. You could put an exclusion into the scanner on the lower table %error histogram to not include any data above 5900 HZ, and then setup the upper histogram to not include any data below 5725 HZ (the 2 halfway points between the next cells in both tables that I see in the E40 OS I'm looking at).Quote:
Originally Posted by Shrek
Your other option is to just setup your own table and manually enter all of the HZ cells that both tables see, then just copy/paste special by % the correct sections of your log into the corresponding tables, with your final step being to make sure 5800 is exactly the same in both cells...otherwise you run the risk of something really funky happening right at 5800 HZ.
That's what the forum is for...I ask what some guys consider to be some pretty dumb questions sometimes...but then at other times I also get pretty advanced...you'll do the same.Quote:
Originally Posted by GXPLS4
Ok so heres what confuses me befor i jump into this bill i read your writeup excellent info im starting to gather info from diffrent sources now however im still unclear when it comes to this MAF table. mostly all im looking to do is swap to a 85mm northstar maf the tables i find though have more numbers than hz cells both hi and low which leaves me quite clueless.
N*star
1.59 1.88 2.2 2.58 2.99 3.45 3.95 4.5 5.1 5.76 6.46 7.23 8.06 8.95 9.9 10.91 11.98 13.14 14.39 15.74 17.19 18.74 20.39 22.14 23.99 25.95 27.99 30.14 32.38 34.71 37.16 39.73 42.5 45.41 48.47 51.67 55.02 58.48 62.1 65.86 69.77 73.82 78.06 82.48 87.07 91.82 96.74 101.82 107.08 112.48 118.07 123.83 129.76 135.87 142.17 148.61 155.26 162.11 169.17 176.44 183.94 191.72 199.8 208.06 216.62 225.44 234.52 243.89 253.45 263.21 273.23 283.55 294.15 305.06 316.32 327.93 339.92 352.32 365.16 378.47 392.3
06 GXP
low:
0.0517 0.0682 0.0868 0.1085 0.1343 0.1653 0.2025 0.2460 0.2976 0.3565 0.4237 0.5002 0.5859 0.6800 0.7844 0.8960 1.0179 1.1533 1.3042 1.4695 1.6566 1.8653 2.0937 2.3397 2.6032 2.8843 3.1788 3.4909 3.8205 4.1678 4.5305 4.9118 5.3138
MAF HI
5.3138 5.8832 6.4940 7.1502 7.8602 8.6249 9.4465 10.3249 11.2601 12.2543 13.3094 14.4275 15.6087 16.8561 18.1706 19.5491 20.9990 22.5223 24.1210 25.8034 27.5695 29.4234 31.3673 33.4031 35.5227 37.7435 40.0718 42.5179 45.0931 47.8079 50.6767 53.7149 56.9382
If this is a cognitive exercise - something you are undertaking for the experience - then you could use a spreadsheet program (like Excel) to extrapolate the values.
However, the copy & paste approach won't work out very well. The Northstar MAF has been transplanted into a new airflow path - different ducting, underhood temps, and an engine with a different VE.
The MAF needs to be tuned to its new environment. As an example - many who have installed a cold air intake on a Trailblazer SS, would have noticed the truck go lean. Same engine, same MAF - but very different ducting / airflow. In your case, the entire environment has changed with respect to the MAF - requiring a retune.