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.
Forum for discussing how to install MicroSquirt(TM), choose and troubleshoot sensors, wiring, and communications for MicroSquirt (TM) and MicroSquirt Module(TM).
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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.
I have just ordered a microsquirt and have been looking at the installation instructions and other documentation and could not quite wrap my head arround how to wire up the dual spark for my application.
I have a 78 Suzuki GS1000 (inline 4 wasted spark)that i have converted from Points to Dyna S electronic pickups. Each pickup drives one of the 2 coils.Is it possible to have the Dyna S hooked up to the microsquirt so that i will be able to adjust my timing and get rid of the mechanical advance?
Flatline_Racing wrote:
I have a 78 Suzuki GS1000 (inline 4 wasted spark)that i have converted from Points to Dyna S electronic pickups. Each pickup drives one of the 2 coils.Is it possible to have the Dyna S hooked up to the microsquirt so that i will be able to adjust my timing and get rid of the mechanical advance?
From the drawing, it looks like the Dyna S electronic pickups also are a ignition amplifier, since the outputs go direct to the ignition coils. In other words the high-current drive is part of the Dyna S.
If this is the case then what you will want to do is pull the output high with, say a 1Kohm resistor, and hook this junction to the VR inputs of uS. The pullup resistor setup should provide the switching squarewave needed. However, the first VR channel in uS is set to 150mV crossing, so you may wan to use the opto input for the first channel. The second VR input trip point is higher at 1.8V, so this would be perfect for the second pickup.
I have a similar set-up. A GS1100 2 valve engine in a lotus seven clone running a Dyna S too. I'm interested in how this works out.
How many watts would the resistors need to be?
I Think that it can be a normal 1/8 or 1/4 watt resister. All that it is doing is pulling the output high instead of leaving it floating. Assuming 12v and a resistance of 1kOhm then the current through it will be 12mA. If I am wrong could someone who knows please let me know before i 'F' something up.
Thanks,
FLR
Last edited by Flatline_Racing on Tue Aug 28, 2007 5:15 pm, edited 1 time in total.
newtyres1 wrote:Use a 1/2 watt resistor to be safe, it's not really any/much bigger, the 1/8 watt could get warm at high revs, depending on duty cycle.
