The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
This forum is for discussing ignition setup, tuning, and troubleshooting for MicroSquirt (TM)
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
DJ Kill wrote:
Why is maximum advance for further timing calculations (for boosted or NA engines) is assumed to be reached at 3000 rpm and not at higher rpm?
same question :why 3000 rmp? on a suzuki swift i have set the redline to 8300 rpm and i dont understend why a flat map from 3000 rpm to 8300 rpm
And i tried the XLS spreadsheet "just for the fun of it" and thought the advance figures at low rpms, especially around idle became VERY weird...
The idle advance figure ended up at the 100kpa bin, now that can´t be right ?
if i put in 8 degrees idle advance i get 29degrees advance at 30kpa/800rpm , that´s a bit rough on a standard engine i think
Although it follows the general "guideline" of advancing the timing at lower loads i don´t think that way of doing it would work to well every time, you need to scale it up so the lower left corner on the "MT" screen becomes low for the idle to work nicely. On most cars anyhow.
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.
woh wrote:...Have a look at this ignition map. It comes from the Jeff Hartman book, Fuel Injection installation, performance tuning, modifications. I modeled this map for my car...
Werner, the statement at the bottom of the pic says the greatest advance at highest load, but unless I'm reading it wrong (lowest pressure and rpm 'idle' at top left and highest pressure about 100kpa at bottom center), it shows the greatest advance at light load where cruise would be. The map in general appears okay but the statement appears wrong - no?
David
snillet wrote:And i tried the XLS spreadsheet "just for the fun of it" and thought the advance figures at low rpms, especially around idle became VERY weird...
The idle advance figure ended up at the 100kpa bin, now that can´t be right ?
if i put in 8 degrees idle advance i get 29degrees advance at 30kpa/800rpm , that´s a bit rough on a standard engine i think
Although it follows the general "guideline" of advancing the timing at lower loads i don´t think that way of doing it would work to well every time, you need to scale it up so the lower left corner on the "MT" screen becomes low for the idle to work nicely. On most cars anyhow.
Can anyone comment on this, I couldn't agree more with what's said above. I'd really like to use this generated map as it is very close to what a friend tuned his car to (at no small expense) on a rolling road (within 1 degree at nearly all points!). Except around idle.
The best approach I can see to this is to create a flat little island in the map where the engine idles, say a 4x4 grid with an advance of 10,10,10,10 and all around it, the timing will leap back up to the generated values...
Excellent guidelines for setting up a starting point ignition map Lance!
After uppgrading to headers and dual 2,5" exhaust and goint to squirt'n spark extra, I really wanted to use the "standard" ignition timing for my car, but that was sort of lost as i locked up the distributor and threq the vacuum unit away..
I had some of the key figures for thew stock setting, but didn't quite know how to turn that in to an ignition map "emulating" the stock distributor advance.
Figure it wouild make sense to tune fuel first using a known working ignition timing, and start tweaking once the fuleing was sorted!
, that´s a bit rough on a standard engine i think 
