I've got the VE table so that all LTFT's are logged between -5 and 5. 3 that I'm tuning currently, and the only modification it has is a "torque" cam from Summit Racing. Now i want to … I'm new to the HPTuners, and to tuning in general. He then … Before we begin, it’s a useful thing to understand exactly how LTFT’s and STFT’s work, and their relationship to the MAF and VE table. Lower airflow values seen at idle will typically result in the LTFT Lo variable being used … Does anyone see an issue tuning the VVE and MAF at the same time with the following formulas, regardless of MAF settings? Assumption is open loop and using a wideband. Is there a procedure to tune an 2001 8. I tried to tune the VE with the Wideband and STFTs … Here is some info help you guys get started tuning with HPTuners. But of course I have a huge list of mods I want to … I was looking at the new maps included in 7. Credit to ozorowski, Keith from HPT, and WS6snake-eater from HPtuners bulletin board for compiling … Steve @ VersaTune wrote: add the STFT and LTFT to get the combined fuel trim. This week I started tuning my 08 G8 GT after installing a Vararam CAI over the weekend. (value in maf hz should be 500,000 which matches … My knowledge of MAF tuning is limited, but I have done it once or twice. Can someone give me a good, … LTFT stays at 0 no matter of what by 0124alexrx8 » August 22nd, 2024, 7:57 am ^ that. MAF … (Note: If all the LTFT’s in your histogram are between +/- 10, skip ahead to “Tuning With STFT’s Alone”) Now, copy your LTFT histogram, and “Paste Special – Add” it into the VE table. So most guides go something like this: Disable (Almost completely) power enrichment by some means, reset fuel trims, drive for 30ish minutes while graphing LTFT … MAF Sensor Scaling (Idle and Cruise): Tuning Crash Course!! GM Gen 3 Mass Airflow Tuning and Scaling, MAF Histrogram Setup, HP Tuners How-To Tutorial Wonder if the tuning guru's could offer the pros/cons of tuning the MAF by disabling the LTFT & using the STFT instead. New here so trying to educate myself on this tuning system. … Open your scanner to your MAF Frequency X LTFT+STFT Histogram. Key terms … Hi Andre, <br /> we are using HP Tuners and struggling with a few things:<br /> 1. The OTS maps have some pretty brutal surging. Never tuned for much of a cam before. You can multiply … Share your videos with friends, family, and the world LTFT’s are just an average of an already average value (STFT’s), STFT’s are instantaneous, and since we can manipulate the MAF to bring this values down and make … Fuel Trim Tuning (MAF) without a wideband Is it possible to do MAF tuning without a wideband O2 sensor? My LTFT's seem OK (between -5% and +5%), but at times, my … OK I tried the tune the VE with LTFT, but had better luck turning of LTFT and using short terms to dial it in with. It emphasizes reading help files and documentation to understand the software before starting. I'm usually around 0. This video will show you how to improve **engine performance* and get started with *automotive tuning**. With the current VCM Suite there is a LTFT & STFT average selection for setting … GM Gen 3 MAF Tuning Intro, The Basics For Mass Air Flow Goat Rope Garage 125K subscribers Subscribe 12. Originally I was doing the VE tuning using the LTFT technique (no WB02 installed at … The ECU uses at least a couple different LTFT variables depending primarily on airflow. 1. Since all fuel calculations and load targeting are based on MAF … In " EC Tunes MAF tuning made easy" he has you turn off the LTFT then tuning the MAF table. Once you feel your STFT's are not going to get any better, you need to re-enable your MAF and setting the MAF Fail Frequency back to 13500 and the DTC PO103 back to what it was set to. Speed Density Depending on what values you are tuning (MAF or VE) you would multiply by this percentage error value the specific MAF or VE cell in your tune via the Editor. Create youself a MAF Freq. from tuning software training to custom tunes HP Tuners Dealer- VCM Suite (free 2hr training session with purchase), credits … LTFT Tuning, Using the Factory 02 Sensors to Dial in Partial Throttle and Idle Engine Knock, False Knock, Knock Sensor Sensitivity Explained! Everything you need to know about MAF vs. Reducing the idle timing by increasing idle torque reserve slightly … Im new to tuning and need help figuring out what to do to fix two issues. I've included a scan with some data, I wasn't able to get … In the majority of factory cars, a MAF sensor is used to tell the ECU what mass of air is entering the engine. Simplest way is to make a histogram using the table 'MAF Airflow vs. Short term or Long term fuel trims? So, following great instructions on ls1tech, I set up a graph of LTFT+STFT against MAF HZ so I can fix my MAF table. . What you will most likely do is use LTFT/STFT histograms on a table that maps MAF Hz elements. Right now I'm running a zzp tune with a MAF relocate and … Specifically, long-term fuel trim (LTFT) plays a significant role in diagnosing issues that may arise in the fuel delivery system. There are 2 ways of doing this, the simplest is to view the LTFT values, average them, and scale the entire … I have done a lot of reading and watching videos about MAF and VE tuning and they all seem to say get a wideband sensor, turn off DFCO, PE, DOD, disable MAF to tune VE … The car was running rich under most conditions. I am going to attempt non-WOT VE table tuning tomorrow or this weekend. 7V (~50g/s), in closed loop operation, the ECU would have to reduce the pulse width in order to maintain 14. I tried the smooth throttle … LTFT perfect when in SD then Approx +10 with MAF Started by bolesauto, 03-21-2021 08:43 PM Replies: 4 Views: 1,984 Last Post: 03-21-2021 10:15 PM by bolesauto This is going to cover just VE/MAF tuning, no other tune adjustments (PE, WOT tuning, Trans tune etc. Using techniques from Goat Rope Garage's … C5 Scan & Tune - Disabling LTFT's with MAF still enabled - How many of you are permanently turning off the LTFT's and just running with only the STFT's enabled with MAF. The reason for the re tune is that we just put heads and a cam in the car. Temporarily disable VVE/SD via the following: * Airflow / Dynamic: … Filter this out and your steady state MAF values developed from your LTFT/STFT should be very close to any overlap developed from the WB in OL/WOT tuning sessions. Re-enable DFCO … Im going to give up on LTFTs. This is for a LS3 (Gen IV) but is still very much … I have a 2000 Silverado 1500 5. 4 and found " {B5001} MAF Calibration Table - LTFT Bank 1%" I did a search and didn't find alot of info on tuning this way. a) What do I have to adjust in my tune to optimize things? b) Should I raise my airflow in "MAF Calibration: Airflow vs. If you are using an average value in your Histogram … This document provides instructions for tuning a Gen III vehicle using HP Tuners software with a wideband O2 sensor. MAF tuning is an effective way to adjust your engine fueling. Suggest looking at You Tube video titled LS3 MAF TUNING USING STFT - HP TUNERS by hughesperformancetuning. Record the combined fuel trim on the calibration spreadsheet next to the corresponding MAF … Hey everyone, I'm trying to get started with tuning the VE/MAF table via LTFT and STFT, (I'll be putting a wideband in eventually for WOT and fine tuning) but when I attempt to … GM uses a Hot Wire MAF design which is similar to a hot wire anemometer used in industry to measure air volume flow in air handlers and laboratory instrumentation. If the MAF table is left with stock values near 2. i cant … This is a simple guide to tuning the ve table using stock 02 sensors and what I have learned through my own experience and knowledge gathered from others. This will work on vehicles with one or two MAF tables. Watched Goat Rope vid on maf tuning but he goes so fast its hard for … Hi All, After a while I was able to get my STFT values within +- 3% on a stock MAF. Which is better to log and correct with for MAF rescaling. I was hoping the OEM MAF calibration would get me close enough. 68% LTFT and dont normally see more than … Idle tuning, SD tuning, MAF tuning, General If your post is missing anyone of those it will likely be deleted since I need that info to verify its a working configuration. The air … If you’re a car enthusiast looking to get the most out of your vehicle’s performance, tuning your MAF (Mass Airflow) sensor with HP Tuners can make a significant difference. I've installed the tune like 1 month ago, drove the car for a good 300-400 miles, and I get … Forum Tuning GM V8 Tuning GM V8 Tuning - Engine, Gas (Gen 3) Airflow mode / LTFT histogram Page 1 of 3 1 2 3 Last Results 1 to 20 of 60. Set PE mode to 100 tps Disconnected the MAF Reset trims Several instances of … LTFT+STFT vs MAF I have set up my LTFT+STFT vs MAF table and have logged a drive from work. The messed up the idle on my z06 and now they are going goofy on my cammed, bolt on truck. … After this, you will need a wideband, and move on to WOT tuning of the MAF and then tuning of the VVE tables. I've … It is essential to reset the Long Term Fuel Trim (LTFT) after performing any maintenance work that may impact the engine fuel and ignition system. There are 2 ways of doing this, the simplest is to view the LTFT values, average them, and scale the entire … Summary While the best method to accurately adjust your VE table and/or MAF calibration is to use a wideband AFR meter, a technique many tuners rely on instead is the fuel trims. 54% This is meant to serve as a basic how-to for setting up a MAF fuel trim Graph (or graphs) in VCM Scanner V3. In stock form, the calibration of this sensor Is there only a single LTFT for the entire MAF range? Assuming #1 is true, if I wanted to calibrate the MAF table [id_maf_tab] (for example, if I installed the RS4 MAF and … The part where it describes tuning the MAF table can be simplified a bit by using a custom histogram in HPT instead of exporting the data to Excel. Of course this is logging with MAF, CL, LTFT's enabled so everything … Forum Tuning GM V8 Tuning GM V8 Tuning - Engine, Gas (Gen 4) Quick guide to simultaneous VVE/MAF calibration for gen4+ Page 11 of 12 First 7 8 9 10 11 12 Last Results … Now there are 2 methods to tuning the Maf, adaptation, disable cylair anticipation, and LTFT, and datalog STFT B1 & B2. LTFT and STFT are percentage corrections in fueling, so you can take the table … In this webinar we’ll discuss the pros and cons of both techniques and see how to set up a histogram to capture the data you’ll need. I think I have one more run on another day with the VE and it will … C5 Scan & Tune - Need help on tuning ltft with hptuners - I have a few bolt ons on my MM6 C5 (K&N gen II FIPK, WCC MAF, R/T X-pipe and cats, B&B Triflow). Copy all results, paste special multiply by % - Half. In this webinar we’ll discuss the pros and … It looks like the first step is to calibrate your MAF table using LTFTs. my maf curve looks like a squiggly line from the last shop that tuned it. 1 maf. The car is pretty stock. Originally Posted by Ziggo As said before, it helps to apply the smooth throttle fix or be using a boost based tune. I've included a scan with some data, I wasn't able to get … In tuning part throttle we will tweak the MAF transfer function according to the LTFT values we logged. But there are some situations when it is not a suitable tuning technique and some situation where it is. I opened the tune and i noticed … Second off I am tuning with no MAF as I guess MAF tuning is a PITAis that correct or no? I currently put a set of Long Tube Headers off road x-pipe catless, and CAI on … Forum Tuning GM V8 Tuning GM V8 Tuning - Engine, Gas (Gen 5) Global B MAF Scaling procedure Results 1 to 9 of 9 G'day, I did a scan on my car and the LTFT and the STFT were not registering. Im running -10 to -14 on my LTFT's and my injector dutys are running 105 to 125%, … i am trying to figure out how to tune my maf. I … In this video, learn to correct fuel trims and adjust fuel using *hp tuners**. At least I think I`m pretty close with the VE tuning, so yesterday I started with the MAF tuning. 5% bigger than stock. Â As … ERM Performance Tuning - - Interactive Learning . MAF is the first place I started. vs Fuel Trim histogram (LTFT) … Hello again! Now I`m trying to dial in the MAF sensor on my LS 5,3/4L60E setup. … I feel like I take 1 step forward and 2 steps back. ) This is going to assume its a factory tune and a stock vehicle since … I'm new to the hole Gen IV tuning program, I did a Ve, and maf tune on a E40, using a wideband, to populate the VE table. My question is can I simply just past special % over my MAF table to correct … the values i'm getting for the stft+ltft don't seem right though because when the maf is at the 4656 hz it's showing this on the chart that the hz on the stft+ltft histo it's at 2375 hz and … I tried tuning with LTFT on, but it kept screwing up because my MAF calibration wasnt "perfec" I turned it off, ran it for a long time with it off, and slowly walked the MAF cal in. The author in no way takes … I have read the procedure on tuning with LTFT using CLSD setup Can any one advise me how to do this with using MAF turned on. I adjusted the MAF sensor signal to get better fuel economy. You can skip this part if you so desire, and go straight to … I just started tuning on my 14 GT and I have a slew of questions. On my particular car LTFT's were 7% at idle and lowered to about 3. IMPORTANT I think there are a few things to remember before MAF tuning/MAF scaling. with maf enabled it runs like crap. … C5 Scan & Tune - Maf tuning question - so I've been screwing around with my car until my books get here. I looked through the file and found that whoever had been in the ECU before dea OK, I spent the entire day tuning. Just a CAI and some Roush exhaust. I have a … I just started tuning a 1999 camarow ss that has been tuned prior to me. my advance at idle is 20 is this high and if so how can I correct it? the other is I am running lean … You will need to log MAF Frequency, Maf Airflow #lb/min, spark source, injector duty cycle, pressure drop across injector, measured AFR bank 1/2, short term fuel trims Bank … Hey guys, I'm new to tuning (which I'm sure you hear a lot) and I'm currently working on a tune for my lnf. in sd the truck runs amazing. This article explores what long-term fuel trim is, how it functions, and how it can be … Just to make sure before I do something really stupid. ** Try to avoid sharp throttle changes for MAF only tuning, so readings are more accurate. For the webinar lesson we’ll be using the HP Tuners software In tuning part throttle we will tweak the MAF transfer function according to the LTFT values we logged. Typically however when doing strictly VE table tuning--you will set the MAF to fail ( putting it into open loop) so you can dial in the VE table without the fuel being adjusted via the … 1. Seems like from my research that the only … So for a stock tune from the factory it seems to run lean according to my LTFT's but STFT's look pretty good. Output Frequency', then plot the … MAF-Only Tuning: save as temporary file. These same settings should be used whether you are maf tuning or ve tuning. MAF Tuning and data-logging using LTFT's/STFT's Tuning / Diagnostics -- engine and transmission The absolute best method and fastest method to tuning the STFT and LTFT is to make a histogram of LTFT + STFT vs MAF frequency and another histogram of LTFT + STFT … So, following great instructions on ls1tech, I set up a graph of LTFT+STFT against MAF HZ so I can fix my MAF table. I have been using SCT's Pro Racer Package (SCT Advantage software) for almost 10 years but one of the … LTFT's have two independant areas of adjustment don't they? Idle and part throttle? Regardless, my trims are within 1% now. PS - Somebody has tuned this car at some point, and as … Thats all there is to it. Every time I think I understand something about tuning my car, something happens that goes against what I thought I knew. Doing this yeilded me very precise results for the average of LTFT and allowed me to really tighten up the MAF values. … I took the maf values down to 0 and it would crank, but only run about 15 sec, then die:doh: . Here is what I did: Copied the high Octane table over the low. not the same power. This This will require looking at both the LTFT and STFT data on a cell by cell basis. 7 AFR, eventually leading to negative values for LTFT. While in closed loop, he logged his LTFTs per MAF-hz value and then averaged them per MAF-hz. Air comes into … When tuning a MAF based engine management system, the first priority is to calibrate the MAF sensor. The only difference is whether the maf is enabled or disabled. Huge thanks to everyone who has helped me … Since the IAT is located in the MAF, when I unplugged the MAF the IAT went to -38degF. a: If the majority of your LTFT cells, are greater than a 10% swing (+- 10), then refer to method 1. My MAF (and T/B) is about 2. By clicking the disable button to LTFT and STFT is that sufficient or do we need to c STFT = Short Term Fuel Trims LTFT = Long Term Fuel Trims So, what is all this MAF calibration business and what does it mean? Here it is in a nutshell. When you get there select the very first cell on the left. leygugf7d
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