May 29, 2018 Cramming a lot of basic Tuner Studio and Megalog viewer knowledge into this video to cover a lot of the normal questions I get. Let me know what else you might like to see. I use megasquirt. Otherwise you might be unlikely to successfully assemble, test, install, and tune the MegaSquirt ® EFI controller. It is an experimental fuel injection unit, after all. One of the reasons the MegaSquirt ® EFI controller came about was because Bruce and Al wanted to increase understanding of fuel control requirements for as many people as. It makes sense to me to get it close first, and then go back and fine tune. If that is true, how many times should a person use autotune to get it close. Can a person simply use auto tune until you get green in most of the cell weighing and that is good for those cells?
Power, performance, optimal efficiency; the objectives of almost any tuner, the key to achieving these objectives is in the data produced by your engine. To achieve these objectives you must know what your engine is asking for or it will never run its best.Captured Data logs are where a modern EFI controlled engine asks. But capturing data is only the first step; you then need simple ways to understand what that data means, what your engine is asking for. Being able to easily select, navigate and compare data fields is critical, but there is more. You want to see the whole story, not just at log traces 1 by 1 in a limited way. To get the full picture you need to see how different fields are related and affect one another, how it all ties together. You need the right tools to work with your data. Suddenly that data becomes so much easier to see and understand, you can sort through vast amounts of data in simple comprehensible views, then act on it.
Whether you are a Professional Tuner or a Weekend Hobbyist, well designed software becomes your most valuable tool and can truly make data simple to work with.
EFI Analytics MegaLogViewer provides tuners the power to view and analyze data in ways not available with other tuning software. If you have used any other software to view datalogs, once you try MegaLogViewer and see how much simpler it make navigating, and how much nicer it works, you will never go back.
MegaLogViewer MS MegaSquirt Edition download Registered Features: - VE Analyze - Standard Line Graphs - Scatter Plots - MegaSquirt Ignition Log Viewer - Option Calculated Fields - Custom Calculated Fields | MegaLogViewer HD Heavy Duty Edition download Little snitch os x 10.13 download. Find here Little Snitch 3 and earlier versions. Little Snitch 3.8.2. Compatible with: macOS 10.13 High Sierra; macOS 10.12 Sierra; OS X 10.11 El Capitan; OS X 10.10 Yosemite; Little Snitch 3 can be registered with licenses obtained for Little Snitch 4. Release Notes. Little Snitch 3.6.4. Compatible with. Already a Registered MegaLogViewer MS user and want to upgrade? For MegaSquirt and more! This is the Premium edition of MegaLogViewer! Increase windows boot camp partition size mac osx. All the features of MegaLogViewer MS plus: - Histograms / Table Generator - Support for dozens of log formats than any other - 1 click smoothing This is the edition to download unless you have a BigStuff3 ECU Learn More download For use with logs for: MegaSquirt AMP EFI MS3-Pro TTS Buell Power Commander Power Vision TCFI Twinscan Motec Holley exports MDF Mclaren Dynojet HPTuner exports EFI Tech ProEFI DTA Fast Electromotive MX2 Torque for Android Tuner Pro csv exports Diablosports ECUDataScan OBD Tester EvoScan Haltech exports Many many more. Download this and if it can not load your delimited log file let us know and it will. Registered Features: - VE Analyze (MegaSquirt, AMP EFI, DTA Fast, Speedino) - Standard Line Graphs - Scatter Plots - Histograms / Table Generator - MegaSquirt Ignition Log Viewer - Option Calculated Fields - Custom Calculated Fields | MegaLogViewer BigStuff3 Edition download BigStuff3 users will also want to check out the all new BigComm Pro Registered Features: - VE Analyze - Standard Line Graphs - Scatter Plots - Histograms / Table Generator - MegaSquirt Ignition Log Viewer - Option Calculated Fields - Custom Calculated Fields |
In 2005 MegaLogViewer was first introduced to support MegaSquirt EFI Controllers, the continuously expanding capabilities, functionality and ease of use has driven adoption by many others for tuning and non tuning use. MegaLogViewer’s Delimited File loader is so adaptable that it can load nearly any delimited or csv log file, along with several specialized loaders for more complex or binary files. People are now using MegaLogViewer for MegaSquirt, Harley Davidson, Buell, Pro EFI, VEMS, BigStuff3 and countless other EFI controllers along with use in some colleges and Universities for data analysis. If you have any delimited file formats that do not load, let us know, support can generally be added quickly.
For controllers that are fully supported such as MegaSquirt 1, 2 & 3 or BigStuff3 the power becomes even greater with Table Tuning and VE Analyze. The VE Analyze in MegaLogViewer is the original VE Analyze that set a new standard for VE Table auto tune correction in 2005. Since that time there have been many attempts to create auto-tune type functionality by many EFI controller manufacturers, but MegaLogViewer is still unmatched in log file accurate VE Table correction using logged data, just as TunerStudio has no live auto-tune competitors in the same class!! They are both built using the same analysis technology and algorithms.
This power to analyze data has lead to MegaLogViewer being adopted by not only many car enthusiast groups, but by universities and laboratories for purposes not even related to the automotive industry! Adding to this power the latest version has the capability for adding new binary log file formats in a plugin style. So even if you are stuck with a tuning or non tuning application that MegaLogViewer does not support with native binary log files, contact us and we can likely make it happen!
Features:
- MSQ File Table Editing
- Auto Update - check here for more info on Auto update
- Scatter Plots rendered almost instantly with hundreds of thousands of records.
- Scale change, from 1/10 to 10x zoom
- Playback from 1/8 speed to 8x speed
- Overlayed Graphs
- Compare mode - Overlay second file values
- Wideband O2 - AFR calculations
- Calculated Fields - RPM/Sec, Vacuum, Boost, PW-1. See Math Parser
- Frame to table Cell display
- Mass Air Flow mapping
- Custom Formulas with free hand math
- Save Graph to Jpeg for easy posting to web
- Customizable colors, gauges and UI features.
- User friendly interface that saves all settings and enables navigation by keyboard, buttons and mouse.
- Text Math Parser for custom extensions and fields
Supports Windows XP, Windows Vista, Windows 7, Apple OS X and Linux
New OS X pkg installer!
(Regardless of the firmware you are using)
Last Updated 3-21-2006 by Jerry Hoffmann, www.DIYAutoTune.com
Many of these principals are applicable for a forced induction vehicle but this was written with tuning an NA vehicle in mind. FI people do your homework!
MSTweak will make tuning your cruise and low-load VE map areas pretty straightforward. MegaTune will allow you to set the crossover (stoic) voltage and will report the AFR on a gauge in MegaTune. Also your MegaSquirt will use the crossover point you programmed to allow you to do real-time closed-loop EGO fueling correction.
What MSTweak does is rely on the EGO correction to bring your mixture back to stoic (or back to whatever you set your crossover point at) when it’s not. Using your logs, it records all of the ‘crossover’ points and what the VE was set to at that point and what correction factor needed to be applied to bring it back to stoic. It can then suggest a corrected VE parameter for the point on the fuel map in question. I can’t stress enough how important it is to read the MSTweak help file (it’s short, just do it), especially the section titled ‘How to get a good datalog’. This will save you much frustration and get you much better logs to work with.
How to use MSTweak 3000 to modify your VE Tables
How to use MSTweak 3000 to modify your VE Tables
MSTweak is great but can be a bit confusing at first. Here’s a step by step focusing on using MST3k to modify your tables. The next paragraph focuses more on the tuning side of things.
- Backup your MegaSquirt configuration first to an .MSQ file.
- Connect to your MegaSquirt using MegaTune and open your fuel/VE Table.
- Go to ‘FILE>VE Export’, and save your VE Table to a .VEX file on your drive.
- Open MSTweak and go to ‘EDIT>Settings’. Set the EGO Crossover Voltage to whatever voltage reading your o2 sensor or wbo2 system read at stoic 14.7:1 AFR (or whatever AFR you want to tune to). 14.7:1 is at .5v on most narrowband sensors, wbo2 systems vary and are sometimes programmable. Check the box next to ‘Outlier Elimination’ to enable this. Click Save. (Read the help file for other configuration options.)
- From the MSTweak main screen go to ‘FILE>Open Datalog’. Select as many current datalogs as you’d like to and click OPEN. This will take a moment to process, it can take a while on slower machines or if you open several large logs. When this is complete (finished plotting is displayed at bottom of the Status window) you are ready to load your VE map.
- From the MSTweak main screen go to ‘EDIT>Modify VE Map’.
- From the ‘Modify VE Map’ window go to ‘FILE>Open LD Map’. Select the map you exported earlier (.VEX file) and click OPEN to open it.
- Now click the ‘Calculate Map’ button on the right side of the current window. MST3k will apply the recommended changes to your map.
- Click ‘FILE>Save LD Map’ and save the updated .VEX file with a different name. (That way you still have your old map to fall back to if needed.)
- Open MegaTune while connected to your MegaSquirt, open your fuel/VE Table, go to ‘FILE>VE Import’ and select your updated .VEX file.
- Click the ‘Send to ECU’ button. Click Close.
- Backup your MegaSquirt configuration to a new, updated .MSQ file.
- That’s it!
Tuning Cruise and low-load areas of your map with MSTweak 3000
So you basically rough out your VE map or use the default map. Just get the car drivable and err on the side of caution with the ignition and fuel, then take a few miles of logs and feed them into MSTweak3000 to get a rough idea of what VE range you will be in and adjust the rest of your map to where it makes sense (add fuel at high RPM ranges and under higher load). If MST3k (MSTweak 3000) sets your cruise VE at 3200 rpms to 60% you but didn’t adjust the 3700 RPM point and you notice it’s set to 90% there you would want to apply some correction to that to bring it back in line with what MST2k is reporting. Say 65%. At this point you really have got a better starting point to get the most benefit from MSTweak 3000.
![Megasquirt base tunes Megasquirt base tunes](/uploads/1/2/6/0/126068168/203260050.png)
So once you’ve got that ‘starting point map’ I mentioned above you’re ready to get some better datalogs. Take a couple hours of logs under multiple conditions (cruise and low rpm, no full throttle power runs yet) and feed them into MSTweak allowing it to correct your map. This will get you MUCH closer to a solid map in very short order.
IMPORTANT: I had a question about this that I’ve verified on the MSTweak forum atwww.msefi.com. The datalogs are tied to the VE table that the MS was using when the datalog was created. In other words if you capture datalogs and then update your VE table after those datalogs were captured then those logs are no longer valid data to feed into MSTweak because they were based on your old datalog files. Datalog, MSTweak to mod you VE table, delete your old ‘used’ datalogs, and then start over at the beginning of the sentence. Once you mod your VE table your old datalogs are no longer valid to tune with.
So capture some logs, feed them into MSTweak and adjust your VE table and then THROW OUT the old logs. Capture new ones if you want under the new VE table and repeat the MSTweak process until you are happy with cruise and low rpm performance. I tuned for stoic 14.7:1 at cruise. I may lean it out more under cruise at some point for economy. I’ve read best economy is at around 16.5:1 if your car likes to cruise that lean. (Read disclaimer below)
Tuning Higher Load areas of your map manually
Next you look at your map and estimate your fueling needs at higher throttle/map and rpm bins on the map. MSTweak3000 is great for cruise and low-load but won’t help you very much here. First you are once again just trying to rough this in based on your cruise VE’s which should now be pretty accurate. As always err on the side of caution by estimating a bit more fuel than you’d expect to need in these upper areas of the map. Then get out on the road (safest and probably most effective with someone else driving though I did it by myself) and do some partial accel runs (in the 70-80 kpa range) into the higher rpm ranges, either datalog it or watch in real-time and adjust your table accordingly. Take one row at a time and tune all higher load (not tuned previously with MST3k) columns in that row. Then move on to the next higher row and do the same thing. Rinse and Repeat. (OK, so don’t rinse anything, just repeat for all rows.) A wideband system is extremely helpful here. You probably want to tune (NA) to about a 12.5-13:1 AFR under throttle. Adjust your 80-100kpa bins based on the results of your 70-80 kpa tuning, like +10% fuel per 10kpa increase (just to rough it in). Then tune the 80-90 kpa range and repeat the adjustment of the 90-100kpa bins to rough them in further, lastly tune the 90-100 kpa range (full throttle run).
I’m sure I missed something here but it should give you a good idea of what I went through anyways which worked for me. My car is running great though I may still take it to a dyno to perfect the ignition map and get all the power I can out of my 86 MR2.
DISCLAIMER — Read the official tuning section in the MegaManual! Read the MSTweak help file! I didn’t write MegaTune or MSTweak3000 so I don’t know everything there is to know about both of them. Be conservative on the ignition timing while tuning and make sure you know more about this than what you just read here. Read lots of books and look for successful examples. Bottom line: take it easy and don’t blow your car up… and if you do it’s not my fault!
So where do I get MSTweak?
- Go to www.msefi.comForum Index -> File Download Area -> Megasquirt Downloads -> Tuning Software -> MSTweak
- Direct link is http://www.msefi.com/dload.php?action=category&cat_id=28
- You will have to login to the forums in order to see the download link.
Where can I ask questions?
- Also on the MSEFI.com forums. MegaSquirt EFI Forum Index -> Software -> MSTweak
- Direct Link is http://www.msefi.com/viewforum.php?f=27
![Tune Tune](/uploads/1/2/6/0/126068168/967438844.jpg)
MSTweak3000 Won’t Read my Logfiles now that I’ve upgraded to MSnS-E 029!
Resolution from ’71jeep’ on the MSEFI.com forums:
Go into Wordpad. Open up your datalog (make sure in file types you select all files other wise you will not be able to see your datalog) and delete the whole first line the first line is just a sentence that states what code it is and a few more words and it should work I ran into the same problem I am not sure what changed. But I found if you delete this it works just fine.
Taken from thread at: http://msefi.com/viewtopic.php?t=17062
Megasquirt Self Tuning
Also this thread covers other possible causes and solutions: http://www.msefi.com/viewtopic.php?t=16283