jdmrx-7

ok here it goes
i need help with the install of my megasquirt. ive read all the post here and at megasquirt well most of them. im getting lost in this version that version CAS, Dizzy. here is what im working with i have a built and tested megasquirt hardware revision 2.2 software revision msv3.0. i want to put it on my 89 gt-x fc turbo and run it as a standalone or do i have to get the MSII. I know i have the CAS system allready. from what i have read it seams that i can run standalone. i want to remove all the factory wire harness.

i need a wire diagram for the CAS to hook it up to the MS

im lost any help is good help and well needed here in Japan

jdmrx-7

can u run edis on the rotor?

johnnyg

Is that the **** I keep getting spam emails about?

jdmrx-7

what? im not spamming anybody im tying to get on the right path

renns

Megasquirt has been coded to support the standard FC CAS and coils, but I'm not aware of anyone running this configuration yet. Check posts by Muxthaibxr (sp??), as he's done the most recent code work on this project. In summary there are two issues:

1.) CAS support for proper timing signals. This is done now, and Mux. had an FC running nicely using the CAS for timing. This requires a daughterboard with two VR sensor signal conditioning circuits. Some prototype boards are out there, but it is quite possible to build this circuit on perf-board if you are into that sort of thing. Here's some more details: http://megasquirt.sourceforge.net/extra/wheel2.html

2.) FC coil support. Leading-only ignition has been used succesfully by a couple people. The programming for trailing with programmable split is done, and has been bench-tested. Some minor circuit board modifications are required to bring out the three ignition timing signals (IgT - leading, IgT - trailing, and Trailing Select). The details are here:
http://www.msefi.com/viewtopic.php?t=7544

This is a diy project, often pursued by highly technical folks who aren't that keen on documentation. This makes it difficult for new arrivals to quickly get up to speed. Much is possible with MS if you have the technical aptitude, and patience to work your way through the reams of documentation. Your install will be more complicated than most (but certainly not impossible) due to the experimental nature of items 1.) and 2.) listed above.

BTW, EDIS is another option, but requires a 36-1 wheel mounted to the front pulley. It offers zero-split or fixed-split timing without coding changes. If you've got the full set of 2nd gen hardware now and are interested in beta-testing, I'd recommend making contact with Mux. and see about running that hardware directly.

jdmrx-7

thanks for the reply. things are a little clear

know sence i have the 2.2 v3.0 i dont need the LM1815 board am i reading this right. if not how do i set it up

renns

You need some way of conditioning those AC signals you get from the two VR sensors in the CAS. The LM1815 daughterboard is one method. There are other signal conditioning methods that have been used with good results as well, with a proven circuit built into the new V3.0 board - see the 'Tach Input' schematic here: http://www.msefi.com/msinfo/ms2/pcb.htm In ignition timing applications, it's critical that you get a true 'zero-crossing' detection method working, otherwise you'll have timing drift with changes in engine speed. Both the V3.0 tach circuit and the LM1815 offer true zero-crossing. If you're just squirting fuel, true zero-crossing is not generally an issue.