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--- techtalk:ref:engctl50f [2020/01/11 23:13]
ixl2relax [Discussion of Old / New Ignition Map Perspectives]
+++ techtalk:ref:engctl50f [2024/01/14 16:17] (current)
hippysmack
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 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
-====== REF: Engine Control 50f ======
+====== REF: Engine Control - Sub-50F ======
 \\
-===== Discussion of Old / New Ignition Map Perspectives =====
+===== Excerpts from XLForum Discussions & Perspectives Related to Ignition Timing Maps =====
-**Note:** Keep in mind that there will always be some argument over the right perspective for creating tuned maps, just as there is for tuning carbs or reading spark plugs. Early experimentation with the TC88A module may have created maps based on a different perspective of the required timing than the later maps were built upon. However, as always, every engine wants and needs settings that are specific to that particular build configuration. There is no One-Size-Fits-All timing map even when the engine configurations, terrain, single/double riders, weight and riding styles are very similar. It is the user's responsibility to evaluate the information they find in order to know that it is compatible with their engine configuration. Also realize that those who are aggressive riders will often tune right to the edge of usability in order to find a bit more power, while other, less agressive riders, may prefer to tune their timing for to avoid variations and factors that might push it over the edge.
+**Note by IXL2Relax:** Keep in mind that there will always be some argument over the right perspective for creating tuned maps, just as there is for tuning carbs or reading spark plugs. Early experimentation with the TC88A module may have created maps based on a different perspective of the required timing than the later maps that were built. However, as always, every engine wants and needs settings that are specific to that particular build configuration. There is no One-Size-Fits-All timing map even when the engine configurations, terrain, single/double riders, weight and riding styles (which all affect engine performance) are all very similar.
+It is the responsibility of the user doing the tuning to evaluate the information they find in order to know that it is compatible with their engine configuration and riding circumstances. Also realize that those who are aggressive riders will often tune right to the edge of usability in searching for a bit more power or responsiveness, while other, less agressive riders, may prefer to tune their timing to avoid problems from some variables and factors that might push it over the edge.
+If, somehow, you overlooked these, be sure to read these comments:\\
+[[techtalk:ref:engctl01#why_adjust_the_spark_timing|Why Adjust The Spark Timing?]] by **RacerWill**\\
+[[techtalk:ref:engctl01#too_much_advance_timing|Too Much Advance Timing]] by **Aaron Wilson**\\
+[[techtalk:ref:engctl01#manifold_absolute_pressure_-vs-_vacuum_reading|Manifold Absolute Pressure -vs- Vacuum Reading]] by **RacerWill**\\
+~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
 \\
-http://xlforum.net/forums/showthread.php?t=1422868\\
+https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/132778-daytona-tc88a-do-your-own-mapping-tips-questions?t=1422868\\
 **Post#117 - Xena commenting on 'Best Map' - May 2012**\\
@@ Line 36: / Line 45: @@
 Also keep in mind that many of us are writing our own, which is the basis of this thread. If you are interested in writing/loading your own you just need the module, the software, the cable, and a Windows based computer. As noted earlier in this thread I'm running what I've dubbed the "Black Panther" Map. It's just another Map in addition to the many Maps that lots of other people have written. I am really not interested in writing Maps for others, but rather in learning and sharing with folks who want to or are currently doing the same. Sorry for the long winded reply, I'd just rather not confuse people with that gen. stuff in this particular thread because from a technical standpoint it really doesn't apply at all.
-\\
+**Post#132 ~Grind~ posting this seen on Nightrider website.)**
+**Some General Rules-of-Thumb Related to Ignition Advance**
+Low engine load = more spark advance\\
+High engine load = less spark advance\\
+Cold engine = more spark advance\\
+.... (& colder weather makes colder engine)\\
+Warm engine = less spark advance\\
+.... (& warmer weather makes warmer engine)\\
+Low RPM = less spark advance\\
+High RPM = more spark advance\\
+Regular grade fuel = subtract 2 degrees\\
+Mid grade fuel = subtract 1 degree\\
+Premium fuel = no adjustment\\
+Optimized squish band = subtract 2 degrees\\
+~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
+\\
 http://xlforum.net/forums/showthread.php?t=336441
@@ Line 56: / Line 83: @@
 .0 degrees @ 30" MAP / Above 4,500 rpm (Wide Open Throttle) ... just right, and makes more power!\\
-....
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+\\
+https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/11396-final-tc88a-map-program-lots-of-other-data?t=18702
+**Post#396 - JBM - Aug 2007** - Spark advance for manifold pressure below 16 In/Hg\\
+To me it's still a mystery why TC88A doesn't calibrate values below 16 in/hg. In HD's own Screamin' Eagle Ignition Race Tuner (SERT) you may customize the stock ignition module with SE ignition curves and calibrate map values in the range of 0-16 in/hg also. The SERT/OE range is 0-103 Kpa (0-30 in/hg), while the Twintec range is 54-103 Kpa (16-30 in/hg). SERT has 9 rows, and four of those are below the TC88A lowest row. I ran SERT before I installed TC88A.
+**Post#412 - JBM - Aug 2007**\\
+This morning I sent an email to Chris Schroeder from Daytona Twin Tec and asked about those advance issues for manifold pressures below 16 In/Hg in TC88A. With his permission I publish his reply:\\ **Very few engines require additional spark advance below 16 in-Hg manifold pressure. The TC88A uses the 16 In-Hg value for all lower pressures. As further clarification, internal cylinder pressure is so low under these conditions (MAP below 16 in-Hg) that maximum spark advance values near 45 degrees are reasonable for most engine applications. Since 45 degrees is the maximum advance the TC88 series is capable of, there is no reason to complicate the advance tables. Even higher advance values yield little benefit.**
-http://xlforum.net/forums/showthread.php?t=18702
 **Post#1005 - Turbota - June 2010**\\
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 It's a shame that you guys and girls are the only people who are providing Daytona Twin Tecs after sale service, Daytona Aren't, and I appreciate it as I am sure every other person who has benefited from your work.
-...
+~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
-http://xlforum.net/forums/showthread.php?t=1419021&page=24\\
+\\
-http://xlforum.net/forums/showpost.php?p=3938074&postcount=235
+https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/132607-tc-88a-chat?t=1419021
 **Post#235 - Rico05r**\\
@@ Line 132: / Line 171: @@
 I have a newer version of the Jester 8 Ball map for the 1250's.
-....
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+\\
-http://xlforum.net/forums/showthread.php?t=1422868
+https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/132778-daytona-tc88a-do-your-own-mapping-tips-questions?t=1422868
 **Post#193 - Highly-Dangerous mentions Turbota's maps: MAP Modified 35 / MAP Modified 33 / MAP Modified 35 Revised** - Nov 2019\\

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