Hello all!
I am currently planning a EFI conversion of a '72 Opel GT and as a result have been digging through every piece of documentation from the MegaSquirt sites, aided by my trusty Heywood and Blair textbooks.
I don't have a specific motivation other than really as a learning event (I am a college student studying combustion), but I am interested in the more specific rules which are being used to create the spark tables here: http://www.useasydocs.com/theory/spktable.htm
I noticed when a different table size is selected and no other modifications are made to the input variables, very odd and unexpected behavior in the construction of the spark tables can occur. I would expect to simply see finer granularity, however what I end up seeing sometimes is a complete loss of the 'curve' idea and a simple shortcut to max advance at max rpm.
I would really like to be able to see the code which is generating the tables so I may more specifically see how the 'rules' are driving the table. I understand there is a version of these rules here: http://www.useasydocs.com/theory/advrules.htm. However there seem to be additional constraints coming in to play in the auto-generating table code.
Does anyone know how I might be able to view the math going on behind the scenes in the spark advance table generator?
Thank you for any input you may have!
Jay
Spark Advance Table Generation
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Spark Advance Table Generation
Jay Swift
Student - Oregon State
Student - Oregon State
Re: Spark Advance Table Generation
I found this thread from almost 10 years ago, however the excel sheet and the table generator online give differing results.
http://www.msextra.com/forums/viewtopic ... 94&t=20237
Does anyone know how the online generator is made?
http://www.msextra.com/forums/viewtopic ... 94&t=20237
Does anyone know how the online generator is made?
Jay Swift
Student - Oregon State
Student - Oregon State