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.
dontz125 wrote:I'm not familiar enough with the B&G code to comment intelligently on that, but I can say that - now that I know you're working with a single - the Extra code allows 'cam' sync of singles using the MAP sensor. No fussing with cam sensors required ...
I think you just made my day. But this is the first I've heard of this and I can't' find any information about using the MAP signal for a cam sync. Can you point me to some documentation on how to set this up?
So, where's the ideal location to trigger a cam signal for a single cylinder? During the crank tooth gap?
It is during the crank tooth gap, as I understand it. The manual reiterates this several times for "dual spark" modes.
You've read the bit about "tying" IGN1 & IGN2 to get a sequential or wasted ignition event?
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Right. I think my confusion is in part due to the "dual spark" mode. Is this mode primarily for V-twin engines?
So, the microsquirt documentation wants the cam signal to happen during the crank's missing tooth location (at least in dual spark mode?).
The Extra code documentation states the exact opposite:
http://msextra.com/doc/ms2extra/MS2-Extra_Dual.htm With a missing-tooth main wheel, the missing tooth provides the main position reference to the Megasquirt. The cam signal should occur away (not co-incident with) the missing tooth, the exact angle is irrelevant, so long as they NEVER overlap.
MSExtra is different to B&G "Dual Spark"...they are two different firmwares that can run on the same hardware. If you are planning on using one, then you have to meet the conditions that are relevant. "Dual spark" is not just for V twins.
Mike
PS The MAP signal syncing than dontz125 refers to is an MSExtra add on. It is what some KTMs use.
MSExtra is different to B&G "Dual Spark"...they are two different firmwares that can run on the same hardware. If you are planning on using one, then you have to meet the conditions that are relevant. "Dual spark" is not just for V twins.
Mike
PS The MAP signal syncing than dontz125 refers to is an MSExtra add on. It is what some KTMs use.
Got it. Thanks for the info. I'd like the option of trying different firmwares but it looks like this cam sensor location will lock me into one or the other.
Obviously the cam sensor location will be fixed to work with one of the firmwares, but you could build flexibility in the missing tooth portion of the crank trigger, by moving the crank sensor or rejigging the wheel.
I've used both firmwares, which is why I get confused too
However, if you want help with MSExtra you will have to post on their dedicated forum, as the forum rules state.
This is on a tiny 250cc engine... Getting the trigger wheel squeezed inside the case and the sensor took a small miracle. There isn't going to be much re-configuring going on in the future if I can help it. lol.
The manual is being updated, and this feature is pretty new. I can give more details over on the Extra forum. Like Mike said, we'll get scolded otherwise ...
dontz125 wrote:The manual is being updated, and this feature is pretty new. I can give more details over on the Extra forum. Like Mike said, we'll get scolded otherwise ...
Come to the Dark Side - we have cookies!
Thanks, dontz125. I just arrived to the Dark Side tonight with much success! And I don't have to drill a hole in my valve cover!
